Relevant bibliographies by topics / Direct CP Asymmetry

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers
  4. Reports

Academic literature on the topic 'Direct CP Asymmetry'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Direct CP Asymmetry"

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MOHANTA, RUKMANI. "STUDY OF DIRECT CP ASYMMETRY IN B+→K0π+". Modern Physics Letters A 15, № 09 (2000): 599–615. http://dx.doi.org/10.1142/s021773230000061x.

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The direct CP asymmetry (aCP) for the process B+→π+K0 is studied including the contributions arising from both the QCD and electroweak penguins and the long range inelastic final state interactions (IFSI). The usually neglected space-like penguins and the annihilation contributions are also taken into account in our analysis. The next-to-leading order low energy effective Hamiltonian and BSW model are used to evaluate the weak transition matrix elements. The effect of space-like and annihilation diagrams are studied using the Lepage and Brodsky model. We found that as a result of FSI, the CP a
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Zyla, P. "SEARCH FOR DIRECT CP VIOLATION IN HYPERON DECAYS." International Journal of Modern Physics A 16, supp01b (2001): 684–86. http://dx.doi.org/10.1142/s0217751x01007790.

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Fermilab experiment E871, HyperCP, is designed to search for evidence of direct CP violation in Cascade and Lambda hyperon decays. The asymmetry of the angular distribution of the proton in the Lambda helicity frame between Ξ-→Λ+π-, Λ→p+π- and the charge-conjugate decays, will be measured. During the 1997 and 1999 fixed target runs at Fermilab HyperCP collaboration collected billions of Cascade and anti-Cascade decays that would make it possible to probe this asymmetry at the 10-4 statistical level. The status of the data analysis is described.
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GENG, C. Q., and Y. K. HSIAO. "DIRECT CP AND T VIOLATION IN BARYONIC B DECAYS." International Journal of Modern Physics A 23, no. 21 (2008): 3290–95. http://dx.doi.org/10.1142/s0217751x08041992.

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We review the direct CP and T violation in the three-body baryonic B decays in the standard model. In particular, we emphasize that the direct CP violating asymmetry in [Formula: see text] is around 22% and the direct T violating asymmetry in [Formula: see text] can be as large as 12%, which are accessible to the current B factories at KEK and SLAC as well as SuperB and LHCb.
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ASATRYAN, H. H., H. M. ASATRIAN, G. K. YEGHIYAN, and G. K. SAVVIDY. "DIRECT CP ASYMMETRY IN INCLUSIVE RARE B-DECAYS IN 2HDM." International Journal of Modern Physics A 16, no. 23 (2001): 3805–22. http://dx.doi.org/10.1142/s0217751x01005079.

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The direct CP asymmetry in the inclusive B → Xdγ and B → Xde+e-decays is investigated in the two-Higgs doublet extension of the Standard Model (2HDM). The investigation is performed in the lowest nonvanishing order of the perturbation theory using the existing restrictions on the 2HDM parameters space. It is shown that the direct CP asymmetry in the B → Xdγ decay can deviate significantly from the Standard Model predictions. In the presence of only one source of CP violation (the CKM matrix weak phase) aCP(B → Xdγ) can have the sign opposite to that in the SM. The new source of CP violation ca
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GIRI, ANJAN K., та RUKMANI MOHANTA. "DIRECT CP VIOLATION AND NEW PHYSICS EFFECTS IN THE DECAY MODE B+→ϕK+". Modern Physics Letters A 19, № 25 (2004): 1903–18. http://dx.doi.org/10.1142/s021773230401518x.

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We study the direct CP violation effect in the decay mode B+→ϕK+. This decay mode is dominated by the loop induced [Formula: see text] penguin diagram with a tiny contribution from the annihilation diagram. Therefore, the standard model expectation of direct CP violation is negligibly small. Using QCD factorization approach we find the CP asymmetry in the standard model to be at percent level. We consider then two scenarios beyond the standard model, the model with an extra vector-like down quark (VLDQ) and the R-parity violating supersymmetric model (RPV) and show that the direct CP violating
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Bar-Shalom, Shaouly, Gad Eilam, Michael Gronau та Jonathan L. Rosner. "Second-order direct CP asymmetry in B(s)→Xℓν". Physics Letters B 694, № 4-5 (2011): 374–79. http://dx.doi.org/10.1016/j.physletb.2010.10.025.

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LÜ, GANG, ZHEN-HUA ZHANG, XIU-YING LIU та LI-YING ZHANG. "NEW RESULT OF DIRECT CP VIOLATION IN B → π+π-π+π-". International Journal of Modern Physics A 26, № 17 (2011): 2899–912. http://dx.doi.org/10.1142/s0217751x11053626.

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In the framework of factorization, based on the first-order of isospin violation, we study direct CP violation in the decay of [Formula: see text] including the effect of ρ–ω mixing. The CP violation depends strongly on Cabibbo–Kobayashi–Maskawa (CKM) matrix elements and the effective parameter, Nc. Recently, the experimental data for the branching ratios of [Formula: see text] are accurate and we can give the strong constraint on the range of Nc. We find that the CP violating asymmetry is large and ranges from -82% to -98% via ρ–ω mixing mechanism when the invariant mass of the π+π- pair is i
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Akeroyd, A. G., Y. Y. Keum та S. Recksiegel. "Effect of supersymmetric phases on the direct CP asymmetry of B→Xdγ". Physics Letters B 507, № 1-4 (2001): 252–59. http://dx.doi.org/10.1016/s0370-2693(01)00455-5.

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Chen, C. H., and C. Q. Geng. "Unparticles and charge parity violation." Canadian Journal of Physics 86, no. 4 (2008): 641–44. http://dx.doi.org/10.1139/p07-182.

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Unparticles proposed by Georgi carry charge parity (CP) conserving phases in their propagators. In this paper, we review our recent works on CP violation due to the peculiar phases of unparticles. We use the decays Bd → π+ π– and Bd → [Formula: see text]–[Formula: see text]+ as the illustrators to show the influences of these phases on the direct CP asymmetries. In particular, we emphasize that if a nonzero CP asymmetry is found in Bd → [Formula: see text]–[Formula: see text]+, it is definitely an indication of the existence of unparticles.PACS Nos.: 12.60.–i 11.30.Er 13.20.He 14.40.Nd
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Betti, Federico. "A Review of CP Violation Measurements in Charm at LHCb." Symmetry 13, no. 8 (2021): 1482. http://dx.doi.org/10.3390/sym13081482.

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The LHCb experiment has been able to collect the largest sample ever produced of charm-hadron decays, performing a number of measurements of observables related to CP violation in the charm sector. In this document, the most recent results from LHCb on the search of direct CP violation in D0→Ks0Ks0, D(s)+→h+π0 and D(s)+→h+η decays are summarised, in addition to the most precise measurement of time-dependent CP asymmetry in D0→h+h− decays and the first observation of mass difference between neutral charm-meson eigenstates.
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Dissertations / Theses on the topic "Direct CP Asymmetry"

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Abazov, V. M., B. Abbott, B. S. Acharya, et al. "Measurement of the direct CP violating charge asymmetry in B-+/- -> mu(+/-)nu D-mu(0) decays." AMER PHYSICAL SOC, 2017. http://hdl.handle.net/10150/622959.

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We present the first measurement of the CP violating charge asymmetry in B-+/- -> mu(+/-)nu D-mu(0) decays using the full Run II integrated luminosity of 10.4 fb(-1) in proton-antiproton collisions collected with the D0 detector at the Fermilab Tevatron Collider. We measure a difference in the yield of B- and B+ mesons in these decays by fitting the reconstructed invariant mass distributions. This results in an asymmetry of A(mu D0) = [-0.14 +/- 0.20] %, which is consistent with standard model predictions.
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Leitner, Olivier Michel André. "Direct CP violation in B decays including \rho - \omega mixing and covariant light-front dynamics." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2003. http://tel.archives-ouvertes.fr/tel-00003690.

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Baalouch, Marouen. "Dalitz analysis of the three-body charmless decay B0 → K0Sπ+π− with the LHCb spectrometer". Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22652/document.

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Le travail présenté dans cette thèse concerne l’étude des désintégrations en trois corps sans quark charmé des mésons beaux neutres, dont l’état final contient un K0S. Ce travail de recherche s’est réalisé dans le cadre de l’expérience LHCb au LHC, en analysant un échantillon d’événements de 3 fb−1 collecté dans le Run I du LHC. L’analyse d’amplitude de la désintégration B0→K0Sπ+π− représente la partie principale de ce travail de thèse. La mesure des amplitudes est effectuée au moyen d’une étude du plan de Dalitz de la désintégration intégrée dans le temps sans étiquetage de la saveur de la pa
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Ongmongkolkul, Piti. "Measurement of the Direct CP Asymmetry in b→sγ via Sum of Exclusive B Meson Decays Using the BABAR Detector". Thesis, 2013. https://thesis.library.caltech.edu/7655/8/thesis.pdf.

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We perform a measurement of direct CP violation in b to sγ A<sub>CP</sub>, and the measurement of a difference between Acp for neutral B and charged B mesons, Delta A_{X_s\gamma}, using 429 inverse femtobarn of data recorded at the Upsilon(4S) resonance with the BABAR detector. B mesons are reconstructed from 16 exclusive final states. Particle identification is done using an algorithm based on Error Correcting Output Code with an exhaustive matrix. Background rejection and best candidate selection are done using two decision tree-based classifiers. We found $\acp = 1.73%+-1.93%+-1.02% and Del
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Conference papers on the topic "Direct CP Asymmetry"

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Akeroyd, A. G., S. Recksiegel та Y. Y. Keum. "Effect of Supersymmetric phases on the Direct CP Asymmetry of B → Xdγ". У Proceedings of the International Workshop. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812811219_0057.

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RECKSIEGEL, S. "DIRECT CP ASYMMETRY IN B → Xdγ AND B → Xsγ IN THE EFFECTIVE SUSY–MODEL". У Proceedings of ICFP2001. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777379_0031.

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Reports on the topic "Direct CP Asymmetry"

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O'Connell, Heath B. Fleischer-Mannel Analysis for Direct CP Asymmetry. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/784906.

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Aubert, B. Measurement of the Direct CP Asymmetry in b --> s gamma Decays. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/826810.

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Aubert, B. Measurements of Branching Fraction, Polarization, and Direct CP-Violating Asymmetry in B{sup +} --> K*{sup 0} {rho}{sup +} decays. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/829775.

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Thompson, Gregory Andrew. Measurement of Direct CP Asymmetry in $B^\pm \to J/ \psi K^\pm$ Decays Produced in $p\bar{p}$ Collisions at $\sqrt{s} = 1.96$ TeV. Office of Scientific and Technical Information (OSTI), 2011. http://dx.doi.org/10.2172/1128075.

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Telnov, Alexandre Valerievich. Direct CP Violation in Charmless Hadronic B-Meson Decays at the PEP-II Asymmetric B-Meson Factory. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/890906.

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