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Journal articles on the topic 'Neutrino rates'

Author: Grafiati

Published: 25 January 2025

Last updated: 31 July 2025

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1

Hargrove, C. K., and D. J. Paterson. "Solar-neutrino neutral-current detection methods in the Sudbury neutrino observatory." Canadian Journal of Physics 69, no. 11 (1991): 1309–16. http://dx.doi.org/10.1139/p91-196.

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The Sudbury Neutrino Observatory will study the solar-neutrino problem through the detection of charged-current (CC), neutral-current (NC), and elastic-scattering (ES) interactions of solar neutrinos with heavy water. The measurement of the NC rate relative to the CC rate provides a nearly model-independent method of observing neutrino oscillations. The NC interaction breaks up the deuteron producing a neutron and a proton. The interaction rate in the original design is measured by observing Čerenkov light from showers produced by neutron-capture γ rays from the capture of the NC neutrons by a

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2

Saez, M. M., O. Civitarese, and M. E. Mosquera. "Neutrino mixing in nuclear rapid neutron-capture processes." International Journal of Modern Physics E 29, no. 04 (2020): 2050022. http://dx.doi.org/10.1142/s0218301320500226.

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A possible mechanism for the formation of heavy-mass elements in supernovae is the rapid neutron-capture-mechanism ([Formula: see text]-process). It depends upon the electron-fraction [Formula: see text], a quantity which is determined by beta-decay-rates. In this paper, we focus on the calculation of electroweak decay-rates in presence of massive neutrinos. The resulting expressions are then used to calculate nuclear reactions entering the rapid-neutron capture. We fix the astrophysical parameters to the case of a core-collapse supernova. The neutrino sector includes a mass scheme and mixing

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3

Chen, Bing-Guang, Tong Liu, Yan-Qing Qi, et al. "Effects of Vertical Advection on Multimessenger Signatures of Black Hole Neutrino-dominated Accretion Flows in Compact Binary Coalescences." Astrophysical Journal 941, no. 2 (2022): 156. http://dx.doi.org/10.3847/1538-4357/aca406.

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Abstract In the coalescence events of binary neutron star (NS) or a black hole (BH) and an NS, a BH hyperaccretion disk might be eventually formed. At very high mass accretion rates, MeV neutrinos will be emitted from this disk, which is called a neutrino-dominated accretion flow (NDAF). Neutrino annihilation in the space out of the disk is energetic enough to launch ultrarelativistic jets to power gamma-ray bursts. Moreover, vertical advection might exist in NDAFs, which can generate the magnetic buoyancy bubbles to release gamma-ray photons. In this paper, we visit the effects of the vertica

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4

Martínez-Miravé, Pablo, Irene Tamborra, and Alejandro Vigna-Gómez. "Identifying Thorne–Żytkow Objects through Neutrinos." Astrophysical Journal Letters 984, no. 1 (2025): L2. https://doi.org/10.3847/2041-8213/adc8ab.

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Abstract Thorne–Żytkow objects (T Z ̇ Os) have been predicted to form when a neutron star is engulfed by a diffuse, convective giant envelope. Accretion onto a neutron star at a rate that is larger than 10−4 M ⊙ yr−1 is expected to lead to significant emission of neutrinos of all flavors with energy of 1–100 MeV. Since the neutrino signal is expected to largely vary in time (from milliseconds to thousands of years), we outline detection strategies tailored to the signal duration. We find that neutrino detection from T Z ̇ Os up to the Small Magellanic Cloud is within the reach of current- and

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Papoulias, D. K., and T. S. Kosmas. "Nuclear study of the exotic neutrino interactions." HNPS Proceedings 22 (March 8, 2019): 79. http://dx.doi.org/10.12681/hnps.1934.

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Open neutrino physics issues require precision studies, both theoretical and experimental ones, and towards this aim coherent neutral current neutrino-nucleus scattering events are expected to be observed soon. In this work, we explore ν -nucleus processes from a nuclear theory point of view and obtain results with high confidence level based on accurate nuclear structure cross sections calculations. The present study explores the differential event rates as well as the total number of events expected to be measured by nuclear detectors, indicating measurable rates. We concentrate on the possi

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Aiello, S., A. Albert, S. Alves Garre, et al. "Searches for neutrino counterparts of gravitational waves from the LIGO/Virgo third observing run with KM3NeT." Journal of Cosmology and Astroparticle Physics 2024, no. 04 (2024): 026. http://dx.doi.org/10.1088/1475-7516/2024/04/026.

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Abstract The KM3NeT neutrino telescope is currently being deployed at two different sites in the Mediterranean Sea. First searches for astrophysical neutrinos have been performed using data taken with the partial detector configuration already in operation. The paper presents the results of two independent searches for neutrinos from compact binary mergers detected during the third observing run of the LIGO and Virgo gravitational wave interferometers. The first search looks for a global increase in the detector counting rates that could be associated with inverse beta decay events generated b

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Walg, Jonathan, Jon Feldman, and Itzhak Orion. "Decay rate changes in radioactive gamma emission as affected by 18 MeV proton cyclotron." Nuclear Technology and Radiation Protection 39, no. 1 (2024): 1–11. http://dx.doi.org/10.2298/ntrp2401001w.

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Previous efforts to investigate changes in the decay constants of radioactive nuclides discovered that solar flares can temporarily alter radioactive decay rates. Thus, discerning whether external factors affect radioactive decay rates is vital for understanding nuclear processes. This study sought to explore the effect of neutrinos on radioactive nuclei by constructing a gamma radiation detection system that employs a radioactive source in front of a neutrino emission system. Responding to cyclotron operations, each of the four detection systems registered gamma count rate decreases. The resu

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8

DUTTA, SHARADA IYER, MARY HALL RENO, and INA SARCEVIC. "ULTRAHIGH ENERGY NEUTRINOS." International Journal of Modern Physics A 18, no. 22 (2003): 4085–96. http://dx.doi.org/10.1142/s0217751x03017385.

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The ultrahigh energy neutrino cross section is well understood in the standard model for neutrino energies up to 1012 GeV, Tests of neutrino oscillations (νμ ↔ ντ) from extragalactic sources of neutrinos are possible with large underground detectors. Measurements of horizontal air shower event rates at neutrino energies above 1010 GeV will be able to constrain nonstandard model contributions to the neutrino-nucleon cross section, e.g., from mini-black hole production.

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LIU, JING-JING, ZHI-QUAN LUO, HONG-LIN LIU, and XIANG-JUN LAI. "NEUTRINO ENERGY LOSS ON IRON GROUP NUCLEI BY ELECTRON CAPTURE IN STRONG MAGNETIC FIELD AT THE CRUSTS OF NEUTRON STARS." International Journal of Modern Physics A 22, no. 19 (2007): 3305–15. http://dx.doi.org/10.1142/s0217751x07037287.

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The neutrino energy loss rates on iron group nuclei by electron capture are calculated in a strong magnetic field at the crusts of Neutron stars. The results show that the magnetic field has only a slight effect on the neutrino energy loss rates in a range of 108–1013 G on surfaces of the most neutron stars. Whereas for some magnetars which range of the magnetic field is 1013–1018 G, the neutrino energy loss rates of the most iron group nuclei would be debased greatly and may be even decreased for 4 orders of magnitude by the strong magnetic field.

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10

Biondini, S., D. Bödeker, N. Brambilla, et al. "Status of rates and rate equations for thermal leptogenesis." International Journal of Modern Physics A 33, no. 05n06 (2018): 1842004. http://dx.doi.org/10.1142/s0217751x18420046.

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In many realizations of leptogenesis, heavy right-handed neutrinos play the main role in the generation of an imbalance between matter and antimatter in the early Universe. Hence, it is relevant to address quantitatively their dynamics in a hot and dense environment by taking into account the various thermal aspects of the problem at hand. The strong washout regime offers an interesting framework to carry out calculations systematically and reduce theoretical uncertainties. Indeed, any matter–antimatter asymmetry generated when the temperature of the hot plasma [Formula: see text] exceeds the

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11

Papoulias, D. K., and T. S. Kosmas. "Standard and Nonstandard Neutrino-Nucleus Reactions Cross Sections and Event Rates to Neutrino Detection Experiments." Advances in High Energy Physics 2015 (2015): 1–17. http://dx.doi.org/10.1155/2015/763648.

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In this work, we exploreν-nucleus processes from a nuclear theory point of view and obtain results with high confidence level based on accurate nuclear structure cross sections calculations. Besides cross sections, the present study includes simulated signals expected to be recorded by nuclear detectors and differential event rates as well as total number of events predicted to be measured. Our original cross sections calculations are focused on measurable rates for the standard model process, but we also perform calculations for various channels of the nonstandard neutrino-nucleus reactions a

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12

Sridhar, Navin, Brian D. Metzger, and Ke Fang. "High-energy Neutrinos from Gamma-Ray-faint Accretion-powered Hypernebulae." Astrophysical Journal 960, no. 1 (2023): 74. http://dx.doi.org/10.3847/1538-4357/ad03e8.

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Abstract Hypernebulae are inflated by accretion-powered winds accompanying hyper-Eddington mass transfer from an evolved post-main-sequence star onto a black hole or neutron star companion. The ions accelerated at the termination shock—where the collimated fast disk winds and/or jet collide with the slower, wide-angled wind-fed shell—can generate high-energy neutrinos via hadronic proton–proton reactions, and photohadronic (p γ) interactions with the disk thermal and Comptonized nonthermal background photons. It has been suggested that some fast radio bursts (FRBs) may be powered by such short

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13

Bergström, Lars, Joakim Edsjö, and Paolo Gondolo. "Indirect neutralino detection rates in neutrino telescopes." Physical Review D 55, no. 4 (1997): 1765–70. http://dx.doi.org/10.1103/physrevd.55.1765.

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Akita, Kensuke, and Masahide Yamaguchi. "A Review of Neutrino Decoupling from the Early Universe to the Current Universe." Universe 8, no. 11 (2022): 552. http://dx.doi.org/10.3390/universe8110552.

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We review the distortions of spectra of relic neutrinos due to the interactions with electrons, positrons, and neutrinos in the early universe. We solve integro-differential kinetic equations for the neutrino density matrix, including vacuum three-flavor neutrino oscillations, oscillations in electron and positron background, a collision term and finite temperature corrections to electron mass and electromagnetic plasma up to the next-to-leading order O(e3). After that, we estimate the effects of the spectral distortions in neutrino decoupling on the number density and energy density of the Co

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15

Misch, G. Wendell, Yang Sun, and George Fuller. "Nuclear Neutrino Spectra in Late Stellar Evolution." EPJ Web of Conferences 178 (2018): 04005. http://dx.doi.org/10.1051/epjconf/201817804005.

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Neutrinos are the principle carriers of energy in massive stars, beginning from core carbon burning and continuing through core collapse and after the core bounce. In fact, it may be possible to detect neutrinos from nearby pre-supernova stars. Therefore, it is of great interest to understand the neutrino energy spectra from these stars. Leading up to core collapse, beginning around core silicon burning, nuclei become dominant producers of neutrinos, particularly at high neutrino energy, so a systematic study of nuclear neutrino spectra is desirable. We have done such a study, and we present o

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BECKER, J. K., and W. RHODE. "INVESTIGATION OF EVENT RATES FOR DIFFERENT DETECTOR ARRAYS AND VARIOUS EXTREMELY HIGH ENERGY MODELS." International Journal of Modern Physics A 21, supp01 (2006): 20–24. http://dx.doi.org/10.1142/s0217751x06033295.

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New detection methods for extremely high energy (EHE) neutrinos are being discussed. In this paper, the comparison of different detection methods at energies E > 107.5 GeV are examined, using various neutrino flux predictions. Arrays for acoustic and radio signals from neutrino induced electromagnetic cascades as well as the IceCube array with additional strings ("IceCube Plus") are investigated with effective volumes as given in 5,6. The depth of the detector below the Earth's surface are examined with respect to the absorption of a potential neutrino signal by the Earth. It can be shown t

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Saez, M. M., K. J. Fushimi, M. E. Mosquera, and O. Civitarese. "Limits on active-sterile neutrino mixing parameters using heavy nuclei abundances." International Journal of Modern Physics E 30, no. 04 (2021): 2150028. http://dx.doi.org/10.1142/s0218301321500282.

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The production of heavy-mass elements due to the rapid neutron-capture mechanism ([Formula: see text]-process) is associated with astrophysical scenarios, such as supernovae and neutron-star mergers. In the [Formula: see text]-process the capture of neutrons is followed by [Formula: see text]-decays until nuclear stability is reached. A key element in the chain of nuclear weak-decays leading to the production of isotopes may be the change of the parameters controlling the neutrino sector, due to the mixing of active and sterile species. In this work, we have addressed this question and calcula

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18

Akaho, Ryuichiro, Hiroki Nagakura, and Thierry Foglizzo. "Detectability of Late-time Supernova Neutrinos with Fallback Accretion onto Protoneutron Star." Astrophysical Journal 960, no. 2 (2024): 116. http://dx.doi.org/10.3847/1538-4357/ad118c.

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Abstract We investigate the late-time neutrino emission powered by fallback mass accretion onto a protoneutron star (PNS), using neutrino radiation-hydrodynamic simulations with full Boltzmann neutrino transport. We follow the time evolution of the accretion flow onto the PNS until the system reaches a quasi-steady state. A standing shock wave is commonly formed in the accretion flow, whereas the shock radius varies depending on the mass accretion rate and the PNS mass. A sharp increase in temperature emerges in the vicinity of the PNS (∼10 km), which characterizes neutrino emission. Both the

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NABI, JAMEEL-UN. "NEUTRINO AND ANTINEUTRINO ENERGY LOSS RATES IN MASSIVE STARS DUE TO ISOTOPES OF TITANIUM." International Journal of Modern Physics E 19, no. 01 (2010): 63–77. http://dx.doi.org/10.1142/s0218301310014716.

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Weak interaction rates on titanium isotopes are important during the late phases of evolution of massive stars. A search was made for key titanium isotopes from available literature and a microscopic calculation of weak rates of these nuclei were performed using the proton-neutron quasiparticle random phase approximation (pn-QRPA) theory. Earlier the author presented the stellar electron capture rates on titanium isotopes. In this paper I present the neutrino and antineutrino energy loss rates due to capture and decay rates on isotopes of titanium in stellar environment. Accurate estimate of n

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STAŚTO, ANNA M. "ULTRAHIGH ENERGY NEUTRINO PHYSICS." International Journal of Modern Physics A 19, no. 03 (2004): 317–40. http://dx.doi.org/10.1142/s0217751x04017082.

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Ultrahigh energy neutrinos can provide important information about the distant astronomical objects and the origin of the Universe. Precise knowledge about neutrino interactions and production rates is essential for estimating background, expected fluxes and detection probabilities. In this paper we review the applications of the high energy QCD to the calculations of the interaction cross-sections of the neutrinos. We also study the production of the ultrahigh energy neutrinos in the atmosphere due to the charm and beauty decays.

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Wang, Edward. "Resonant spin-flavor precession of sterile neutrinos." Journal of Cosmology and Astroparticle Physics 2024, no. 05 (2024): 056. http://dx.doi.org/10.1088/1475-7516/2024/05/056.

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Abstract We analyze the impact of resonant conversions mediated by non-vanishing magnetic moments between active neutrinos and a heavy sterile neutrino on the supernova neutrino flux. We present the level-crossing scheme for such a scenario and derive the neutrino fluxes after conversion, paying particular attention to the order in which the resonances occur. We then compute the expected event rates from the neutronization burst of a future supernova at DUNE and Hyper-Kamiokande to derive new constraints on the neutrino magnetic moment. With this, we find a sensitivity down to a few 10-15 μB f

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22

Gizzi, D., C. Lundman, E. O’Connor, S. Rosswog, and A. Perego. "Calibration of the Advanced Spectral Leakage scheme for neutron star merger simulations, and extension to smoothed-particle hydrodynamics." Monthly Notices of the Royal Astronomical Society 505, no. 2 (2021): 2575–93. http://dx.doi.org/10.1093/mnras/stab1432.

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ABSTRACT We calibrate a neutrino transport approximation, called Advanced Spectral Leakage (ASL), with the purpose of modelling neutrino-driven winds in neutron star mergers. Based on a number of snapshots, we gauge the ASL parameters by comparing against both the two-moment (M1) scheme implemented in the flash code and the Monte Carlo neutrino code sedonu. The ASL scheme contains three parameters, the least robust of which results to be a blocking parameter for electron neutrinos and antineutrinos. The parameter steering the angular distribution of neutrino heating is recalibrated compared to

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Kullmann, I., S. Goriely, O. Just, R. Ardevol-Pulpillo, A. Bauswein, and H.-T. Janka. "Dynamical ejecta of neutron star mergers with nucleonic weak processes I: nucleosynthesis." Monthly Notices of the Royal Astronomical Society 510, no. 2 (2021): 2804–19. http://dx.doi.org/10.1093/mnras/stab3393.

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ABSTRACT We present a coherent study of the impact of neutrino interactions on the r-process element nucleosynthesis and the heating rate produced by the radioactive elements synthesized in the dynamical ejecta of neutron star–neutron star (NS–NS) mergers. We have studied the material ejected from four NS–NS merger systems based on hydrodynamical simulations which handle neutrino effects in an elaborate way by including neutrino equilibration with matter in optically thick regions and re-absorption in optically thin regions. We find that the neutron richness of the dynamical ejecta is signific

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Zegarelli, Angela, Michela Fasano, Silvia Celli, Dafne Guetta, Antonio Capone, and Irene Di Palma. "Neutrino predictions from choked Gamma-Ray Bursts and comparison with the observed cosmic diffuse neutrino flux." EPJ Web of Conferences 280 (2023): 09005. http://dx.doi.org/10.1051/epjconf/202328009005.

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The strong constraints from the Fermi-LAT data on the isotropic gamma-ray background suggest that the neutrinos observed by IceCube might possibly come from sources that are hidden to gamma-ray observations. A possibility emerged in recent years is that neutrinos may come from jets of collapsing massive stars which fail to break out of the stellar envelope, and for this reason they are known as choked jets, or choked Gamma-Ray Bursts (GRBs). We here show our predictions of neutrino flux and spectrum expected from these sources, focusing on Type II SNe, through detailed calculations of pγ inter

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Hernández-Molinero, Beatriz, Carmelita Carbone, Raul Jimenez, and Carlos Peña Garay. "Cosmic background neutrinos deflected by gravity: DEMNUni simulation analysis." Journal of Cosmology and Astroparticle Physics 2024, no. 01 (2024): 006. http://dx.doi.org/10.1088/1475-7516/2024/01/006.

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Abstract The local supercluster acts as a gravity deflection source for cosmic background neutrinos. This deflection by gravity changes the neutrino helicity and therefore has important consequences for ground based tritium capture experiments aimed at determining if the neutrino is Dirac or Majorana. Here we explore the deflection effect of the local supercluster using two simulations from the DEMNUni suite characterised by very different mass resolutions, as they are both filled with 20483 dark matter particles (and an equal number of massive neutrino particles) but have comoving volumes of

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Huang, Jihong, and Shun Zhou. "Helicity-changing decays of cosmological relic neutrinos." Journal of Cosmology and Astroparticle Physics 2024, no. 09 (2024): 067. http://dx.doi.org/10.1088/1475-7516/2024/09/067.

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Abstract In this paper, we examine the possibility that massive neutrinos are unstable due to their invisible decays ν i → ν j + ϕ, where ν i and ν j (for i, j = 1, 2, 3) are any two of neutrino mass eigenstates with masses m i > m i and ϕ is a massless Nambu-Goldstone boson, and explore the implications for the detection of cosmological relic neutrinos in the present Universe. First, we carry out a complete calculation of neutrino decay rates in the general case where the individual helicities of parent and daughter neutrinos are specified. Then, the invisible decays of cosmological relic

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Li, Gexing, and Zhihong Li. "A Promising Approach for Determining Neutrino Mass Hierarchy by Using Supernova Neutrino Detections." Astrophysical Journal 976, no. 2 (2024): 206. http://dx.doi.org/10.3847/1538-4357/ad8cd9.

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Abstract The determination of neutrino mass hierarchy is crucial for particle physics, astrophysics, and cosmology. In this work, we propose an easy-to-use method to determine the neutrino hierarchy based on core-collapse supernova (CCSN) neutrino detections. By analyzing the expected event rates of the neutrino burst at a terrestrial water Cherenkov detector, we found that the event rates predicted by the normal and inverted hierarchy models have marked differences in the neutrino energy range 10 ∼ 20 MeV and the postbounce time <0.5 s. Within this specific energy and time range, the analy

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Batziou, Eirini, Robert Glas, H. Thomas Janka, Jakob Ehring, Ernazar Abdikamalov, and Oliver Just. "Nucleosynthesis Conditions in Outflows of White Dwarfs Collapsing to Neutron Stars." Astrophysical Journal 984, no. 2 (2025): 197. https://doi.org/10.3847/1538-4357/adc300.

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Abstract An accretion-induced collapse (AIC) or merger-induced collapse (MIC) of white dwarfs (WDs) in binary systems is an interesting path to neutron star (NS) and magnetar formation, alternative to stellar core-collapse and NS mergers. Such events could add a population of compact remnants in globular clusters; they are expected to produce yet unidentified electromagnetic transients including gamma-ray and radio bursts, and to act as sources of transiron elements, neutrinos, and gravitational waves. Here, we present the first long-term (≳5 s postbounce) hydrodynamical simulations in axisymm

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Dzhioev, A. A., A. V. Yudin, N. V. Dunina-Barkovskaya, and A. I. Vdovin. "Neutrino Spectrum and Energy Loss Rates Due to Weak Processes on Hot 56Fe in Pre-Supernova Environment." Particles 6, no. 3 (2023): 682–92. http://dx.doi.org/10.3390/particles6030041.

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Applying TQRPA calculations of Gamow–Teller strength functions in hot nuclei, we compute the (anti)neutrino spectra and energy loss rates arising from weak processes on hot 56Fe under pre-supernova conditions. We use a realistic pre-supernova model calculated by the stellar evolution code MESA. Taking into account both charged and neutral current processes, we demonstrate that weak reactions with hot nuclei can produce high-energy (anti)neutrinos. We also show that, for hot nuclei, the energy loss via (anti)neutrino emission is significantly larger than that for nuclei in their ground state. I

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Gaba, R., S. Jaydip, V. Bhatnagar, and S. Jyotsna. "Prediction of supernova neutrino signals by detectors and its future challenges." Journal of Instrumentation 18, no. 07 (2023): C07003. http://dx.doi.org/10.1088/1748-0221/18/07/c07003.

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Abstract Supernova neutrinos produced during a core collapse of a massive star, carries 99% of the energy produced during the violent phenomenon. These neutrinos are weakly interacting massive particles and can provide useful information for both particle physics (neutrino oscillations parameters) and astrophysics (explosion mechanism). This information can be used to explore physics beyond the standard model. Neutrinos escape from the supernova core hours before the light, so a neutrino signal providing information about supernova direction can enable early observation. The current generation

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Bottaro, Salvatore, Andrea Caputo, and Damiano F. G. Fiorillo. "Neutrino emission in cold neutron stars: Bremsstrahlung and modified urca rates reexamined." Journal of Cosmology and Astroparticle Physics 2024, no. 11 (2024): 015. http://dx.doi.org/10.1088/1475-7516/2024/11/015.

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Abstract Neutrino emission in cold neutron stars is dominated by the modified urca (murca) process and nucleon-nucleon bremsstrahlung. The standard emission rates were provided by Friman and Maxwell in 1979, effectively based on a chiral Lagrangian framework with pion and rho meson exchange, supplemented by Landau parameters to describe short-range interactions. We reevaluate these rates within the same framework, correcting several errors and removing unnecessary simplifications, notably the triangular approximation — where the Fermi momenta of protons and leptons negligible compared to that

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Wu, Quan-feng, and Xun-Jie Xu. "Shedding light on neutrino self-interactions with solar antineutrino searches." Journal of Cosmology and Astroparticle Physics 2024, no. 02 (2024): 037. http://dx.doi.org/10.1088/1475-7516/2024/02/037.

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Abstract Solar antineutrinos are absent in the standard solar model prediction. Consequently, solar antineutrino searches emerge as a powerful tool to probe new physics capable of converting neutrinos into antineutrinos. In this study, we highlight that neutrino self-interactions, recently gaining considerable attention due to their cosmological and astrophysical implications, can lead to significant solar antineutrino production. We systematically explore various types of four-fermion effective operators and light scalar mediators for neutrino self-interactions. By estimating the energy spect

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DEV, S., and JYOTI DHAR SHARMA. "THE STATUS OF THE SOLAR NEUTRINO PROBLEM IN THE RESONANT SPIN-FLAVOR PRECESSION SCENARIO WITH TWISTING SOLAR MAGNETIC FIELDS." Modern Physics Letters A 15, no. 22n23 (2000): 1445–60. http://dx.doi.org/10.1142/s0217732300001870.

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Resonant spin-flavor precession scenario with twisting solar magnetic fields has been confronted with the solar neutrino data from various ongoing experiments. In particular, the anticorrelation apparent in the Homestake solar neutrino data has been taken seriously to constrain the twisting profiles of the magnetic field in the convective zone of the Sun. The twisting profiles, thus derived, have been used to calculate the neutrino detection rates for the Homestake, Kamiokande (super-Kamiokande) and the gallium experiments. It is found that the presence of twisting reduces the degree of antico

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Jonathan, Walg, Rodnianski Anatoly, and Orion Itzhak. "Solar flare detection method using Rn-222 radioactive source." GSC Advanced Research and Reviews 5, no. 2 (2020): 159–66. https://doi.org/10.5281/zenodo.4319660.

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Solar neutrino detection is known to be a very challenging task, due to the minuscule absorption cross-section and mass of the neutrino. One research showed that relative large solar-flares affected the decay-rates of Mn-54 in December 2006. Since most the radiation emitted during a solar flare are blocked before reaching the earth surface, it should be assumed that such decay-rate changes could be due to neutrino flux increase from the sun, in which only neutrinos can penetrate the radionuclide. This study employs the Rn-222 radioactive source for the task of solar flare detection, based on t

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Bahcall, J. N., and M. Cribier. "The Standard Solar Model." International Astronomical Union Colloquium 121 (1990): 21–41. http://dx.doi.org/10.1017/s0252921100067798.

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AbstractThe main features of standard solar models, the logic of the calculations, and some of the important results concerning solar neutrinos experiments are given. The input parameters that cause the greatest uncertainties in the calculated neutrino fluxes are the nuclear rection rates, the chemical abundances, the radiative opacity, and the equation of state. This article is based, with permission of the publisher, on Chapters 1 and 4 of Neutrino Astrophysics by J. N. Bahcall, Cambridge University Press (1989).

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Albuquerque, Ivone F. M., Jodi Lamoureux, and George F. Smoot. "Astrophysical Neutrino Event Rates and Sensitivity for Neutrino Telescopes." Astrophysical Journal Supplement Series 141, no. 1 (2002): 195–209. http://dx.doi.org/10.1086/340281.

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Riquelme, M., A. Reisenegger, O. Espinosa, and C. O. Dib. "Neutrino emission rates in highly magnetized neutron stars revisited." Astronomy & Astrophysics 439, no. 2 (2005): 427–32. http://dx.doi.org/10.1051/0004-6361:20042263.

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Pascal, A., J. Novak, and M. Oertel. "Proto-neutron star evolution with improved charged-current neutrino–nucleon interactions." Monthly Notices of the Royal Astronomical Society 511, no. 1 (2022): 356–70. http://dx.doi.org/10.1093/mnras/stac016.

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ABSTRACT We perform simulations of the Kelvin–Helmholtz cooling phase of proto-neutron stars with a new numerical code in spherical symmetry and using the quasi-static approximation. We use for the first time the full set of charged-current neutrino–nucleon reactions, including neutron decay and modified Urca processes, together with the energy-dependent numerical representation for the inclusion of nuclear correlations with random phase approximation. Moreover, convective motions are taken into account within the mixing length theory. As we vary the assumptions for computing neutrino–nucleon

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Jentschura, Ulrich D., and Robert Ehrlich. "Lepton Pair Čerenkov Radiation Emitted by Tachyonic Neutrinos: Lorentz-Covariant Approach and IceCube Data." Advances in High Energy Physics 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/4764981.

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Current experiments do not exclude the possibility that one or more neutrinos are very slightly superluminal or that they have a very small tachyonic mass. Important bounds on the size of a hypothetical tachyonic neutrino mass term are set by lepton pair Čerenkov radiation (LPCR), that is, by the decay channelν→e+e-ν, which proceeds via a virtualZ0boson. Here, we use a Lorentz-invariant dispersion relation which leads to very tight constraints on the tachyonic mass of neutrinos; we also calculate decay and energy loss rates. A possible cutoff seen in the IceCube neutrino spectrum forEν>2 Pe

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Itoh, Naoki. "Neutrino Emission Processes in the Weinberg-Salam Theory." International Astronomical Union Colloquium 108 (1988): 434–35. http://dx.doi.org/10.1017/s025292110009429x.

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The neutrino emission processes play essential roles in stellar evolution as expemplified by the observations of the neutrinos from SN 1987a by the KAMIOKANDE-II and IMB experiments. Recently a very extensive study of the various neutrino emission processes based on the Weinberg-Salam theory has been completed by the present author and his collaborators. The neutrino emission processes calculated by the author’s group include pair, photo-, plasma, and bremsstrahlung neutrino processes. The neutrino energy loss rates due to pair, photo-, and plasma processes in the framework of the Weinberg-Sal

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Song, Cui-Ying, Tong Liu, and Yun-Feng Wei. "Neutrinos and gravitational waves from magnetized neutrino-dominated accretion discs with magnetic coupling." Monthly Notices of the Royal Astronomical Society 494, no. 3 (2020): 3962–70. http://dx.doi.org/10.1093/mnras/staa932.

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ABSTRACT Gamma-ray bursts (GRBs) might be powered by black hole (BH) hyperaccretion systems via the Blandford–Znajek (BZ) mechanism or neutrino annihilation from neutrino-dominated accretion flows (NDAFs). Magnetic coupling (MC) between the inner disc and BH can transfer angular momentum and energy from the fast-rotating BH to the disc. The neutrino luminosity and neutrino annihilation luminosity are both efficiently enhanced by the MC process. In this paper, we study the structure, luminosity, MeV neutrinos, and gravitational waves (GWs) of magnetized NDAFs (MNDAFs) under the assumption that

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Sawada, Ryo, and Yosuke Ashida. "Toward Multienergy Neutrino Astronomy: Diagnosing Enhanced Circumstellar Material around Stripped-envelope Supernovae." Astrophysical Journal 982, no. 2 (2025): 93. https://doi.org/10.3847/1538-4357/adb721.

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Abstract A novel approach is proposed to reveal a secret birth of enhanced circumstellar material (CSM) surrounding a collapsing massive star using neutrinos as a unique probe. In this scheme, nonthermal TeV-scale neutrinos produced in ejecta–CSM interactions are tied with thermal MeV neutrinos emitted from a pre-explosion burning process, based on a scenario that CSM had been formed via the presupernova activity. Taking a representative model of the presupernova neutrinos, the spectrum and light curve of the corresponding high-energy CSM neutrinos are calculated at multiple mass-loss efficien

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Paar, N., T. Marketin, D. Vale, and D. Vretenar. "Modeling nuclear weak-interaction processes with relativistic energy density functionals." International Journal of Modern Physics E 24, no. 09 (2015): 1541004. http://dx.doi.org/10.1142/s0218301315410049.

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Relativistic energy density functionals have become a standard framework for nuclear structure studies of ground state properties and collective excitations over the entire nuclide chart. In this paper, we review recent developments in modeling nuclear weak-interaction processes: Charge-exchange excitations and the role of isoscalar proton–neutron pairing, charged-current neutrino–nucleus reactions relevant for supernova evolution and neutrino detectors and calculation of β-decay rates for r-process nucleosynthesis.

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MORRISON, DOUGLAS R. O. "UPDATED REVIEW OF SOLAR MODELS AND SOLAR NEUTRINO EXPERIMENTS." International Journal of Modern Physics D 01, no. 02 (1992): 281–302. http://dx.doi.org/10.1142/s0218271892000148.

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The Conventional Wisdom that there is a Solar Neutrino Problem and that New Physics is required, is examined. The various solar evolutionary models, (or SSM), are described and in particular the four new 1992 papers. While the evolutionary models are generally robust, there are important assumptions and uncertainties (screening, nuclear reaction rates, etc.) which mean that the errors cannot be small. Diffusion in the Sun is expected to be significant but so far there is no calculation which includes all types of diffusion, especially turbulent diffusion. The new and important helioseismologic

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Itoh, Naoki. "Neutron Star Cooling: Criticical Test of Dense Matter Physics." Symposium - International Astronomical Union 125 (1987): 439–46. http://dx.doi.org/10.1017/s007418090016108x.

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Recent developments in the standard theory of neutron star cooling is critically reviewed. Emphasis is placed on the recent developments in the calculations of thermal conductivity and neutrino energy loss rates.

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Abbasi, R., M. Ackermann, J. Adams, et al. "Constraints on Populations of Neutrino Sources from Searches in the Directions of IceCube Neutrino Alerts." Astrophysical Journal 951, no. 1 (2023): 45. http://dx.doi.org/10.3847/1538-4357/acd2ca.

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Abstract Beginning in 2016, the IceCube Neutrino Observatory has sent out alerts in real time containing the information of high-energy (E ≳ 100 TeV) neutrino candidate events with moderate to high (≳30%) probability of astrophysical origin. In this work, we use a recent catalog of such alert events, which, in addition to events announced in real time, includes events that were identified retroactively and covers the time period of 2011–2020. We also search for additional, lower-energy neutrinos from the arrival directions of these IceCube alerts. We show how performing such an analysis can co

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Just, O., S. Goriely, H.-Th Janka, S. Nagataki, and A. Bauswein. "Neutrino absorption and other physics dependencies in neutrino-cooled black hole accretion discs." Monthly Notices of the Royal Astronomical Society 509, no. 1 (2021): 1377–412. http://dx.doi.org/10.1093/mnras/stab2861.

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ABSTRACT Black hole (BH) accretion discs formed in compact-object mergers or collapsars may be major sites of the rapid-neutron-capture (r-)process, but the conditions determining the electron fraction (Ye) remain uncertain given the complexity of neutrino transfer and angular-momentum transport. After discussing relevant weak-interaction regimes, we study the role of neutrino absorption for shaping Ye using an extensive set of simulations performed with two-moment neutrino transport and again without neutrino absorption. We vary the torus mass, BH mass and spin, and examine the impact of rest

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Slad, L. M. "Existing and expected manifestations of a new fundamental interaction." International Journal of Modern Physics E 30, no. 06 (2021): 2150052. http://dx.doi.org/10.1142/s021830132150052x.

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In this paper, a number of characteristics of the new fundamental interaction are described. The interaction is carried by a massless pseudoscalar boson and extends to at least the electron neutrino, proton and neutron. A substantiation of the existence of such an interaction is supported by an good agreement between the theoretical and experimental rates of all the five observed processes with solar neutrinos. A bright manifestation of the new interaction is expected in the observation that its contribution to the rate of splitting of a number of light stable nuclei by reactor antineutrinos i

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Chauhan, S., M. Sajjad Athar, and S. K. Singh. "Neutrino-nucleus cross-sections at supernova neutrino energies." International Journal of Modern Physics E 26, no. 07 (2017): 1750047. http://dx.doi.org/10.1142/s0218301317500471.

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The inclusive neutrino/antineutrino-induced charged and neutral current reaction cross-sections in [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] in the energy region of supernova neutrinos/antineutrinos are studied. The calculations are performed in the local density approximation (LDA) taking into account the effects due to Pauli blocking, Fermi motion and the renormalization of weak transition strengths in the nuclear medium. The effect of Coulomb distortion of the lepton produced in the charged current reactions has also been incl

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Panda, Papia, Monojit Ghosh, and Rukmani Mohanta. "Determination of neutrino mass ordering from Supernova neutrinos with T2HK and DUNE." Journal of Cosmology and Astroparticle Physics 2023, no. 10 (2023): 033. http://dx.doi.org/10.1088/1475-7516/2023/10/033.

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Abstract In this paper, we study the possibility of determining the neutrino mass ordering from the future supernova neutrino events at the DUNE and T2HK detectors. We estimate the expected number of neutrino event rates from a future supernova explosion assuming Garching flux model corresponding to different processes that are responsible for detecting the supernova neutrinos at these detectors. We present our results in the form of χ2, as a function of supernova distance. For a systematic uncertainty of 5% in normalisation as well as energy calibration error, our results show that, the neutr

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