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Journal articles on the topic 'Missing transverse momentum (MET)'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Moreira, P., and G. Polesello. "The missing transverse momentum trigger electronics of UA2." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 287, no. 3 (1990): 417–21. http://dx.doi.org/10.1016/0168-9002(90)91556-q.

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2

Barger, V., K. Hagiwara, T. Han, and D. Zeppenfeld. "Constraints on exotic particles from tevatron missing transverse momentum data." Physics Letters B 220, no. 3 (1989): 464–70. http://dx.doi.org/10.1016/0370-2693(89)90904-0.

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3

GRIPAIOS, BEN. "TOOLS FOR EXTRACTING NEW PHYSICS IN EVENTS WITH MISSING TRANSVERSE MOMENTUM." International Journal of Modern Physics A 26, no. 29 (2011): 4881–900. http://dx.doi.org/10.1142/s0217751x11054826.

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4

Gaz, Alessandro. "Searches for squarks and gluinos in events with missing transverse momentum." EPJ Web of Conferences 60 (2013): 07004. http://dx.doi.org/10.1051/epjconf/20136007004.

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5

Sakttyama, H., and K. Watanabe. "Events with large missing transverse momentum in the CERN pp colliders." Lettere Al Nuovo Cimento Series 2 43, no. 5 (1985): 249–56. http://dx.doi.org/10.1007/bf02747023.

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6

FERRANDO, J. "ISOLATED LEPTONS IN EVENTS WITH LARGE MISSING TRANSVERSE MOMENTUM AND THE SEARCH FOR SINGLE TOP PRODUCTION AT HERA." Modern Physics Letters A 21, no. 25 (2006): 1901–16. http://dx.doi.org/10.1142/s0217732306021323.

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Recent results in searches for high transverse momentum leptons in events with large missing transverse momentum in electron–proton collisions at HERA are reviewed. These searches have implications for searches for physics beyond the Standard Model. The most recent results on searches for single top production via Flavour Changing Neutral Currents are reviewed. The consistency of results from the H1 and ZEUS collaborations and prospects of discovering new physics during the final year of HERA running are discussed.

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7

Chekanov, S., M. Derrick, D. Krakauer, et al. "Isolated tau leptons in events with large missing transverse momentum at HERA." Physics Letters B 583, no. 1-2 (2004): 41–58. http://dx.doi.org/10.1016/j.physletb.2003.12.054.

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8

Andreev, V., B. Andrieu, T. Anthonis, et al. "Isolated electrons and muons in events with missing transverse momentum at HERA." Physics Letters B 561, no. 3-4 (2003): 241–57. http://dx.doi.org/10.1016/s0370-2693(03)00497-0.

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9

CARLI, TANCREDI, DOMINIK DANNHEIM, and LORENZO BELLAGAMBA. "EVENTS WITH ISOLATED CHARGED LEPTONS AND LARGE MISSING TRANSVERSE MOMENTUM AT HERA." Modern Physics Letters A 19, no. 25 (2004): 1881–902. http://dx.doi.org/10.1142/s0217732304015142.

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Striking events with isolated charged leptons, large missing transverse momentum and large transverse momentum of the hadronic final state [Formula: see text] were observed at the electron proton collider HERA in a data sample corresponding to an integrated luminosity of about 130 pb-1. The H1 collaboration observed 11 events with isolated electrons or muons and with [Formula: see text]. Only 3.4±0.6 events were expected from Standard Model (SM) processes. Six of these events have [Formula: see text], while 1.3±0.3 events were expected. The ZEUS collaboration observed good agreement with the SM. However, ZEUS found two events with a similar event topology, but tau leptons instead of electrons or muons in the final state. Only 0.2±0.05 events were expected from SM processes. For various hypotheses, the compatibility of the experimental results was investigated with respect to the SM and with respect to possible explanations beyond the SM. Prospects for the high-luminosity HERA-II data taking period are given.

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10

Tawfik, Abdel Nasser. "Out-Of-Equilibrium Transverse Momentum Spectra of Pions at LHC Energies." Advances in High Energy Physics 2019 (June 2, 2019): 1–7. http://dx.doi.org/10.1155/2019/4604608.

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In order to characterize the transverse momentum spectra (pT) of positive pions measured in the ALICE experiment, two thermal approaches are utilized; one is based on degeneracy of nonperfect Bose-Einstein gas and the other imposes an ad hoc finite pion chemical potential. The inclusion of missing hadron states and the out-of-equilibrium contribute greatly to the excellent characterization of pion production. An excellent reproduction of these pT-spectra is achieved at μπ=0.12 GeV and this covers the entire range of pT. The excellent agreement with the experimental results can be understood as a manifestation of not-yet-regarded anomalous pion production, which likely contributes to the long-standing debate on “anomalous” proton-to-pion ratios at top RHIC and LHC energies.

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11

Aktas, A., V. Andreev, T. Anthonis, et al. "Search for light gravitinos in events with photons and missing transverse momentum at HERA." Physics Letters B 616, no. 1-2 (2005): 31–42. http://dx.doi.org/10.1016/j.physletb.2005.04.038.

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12

Ackerstaff et al., K. "Search for anomalous production of di-lepton events with missing transverse momentum in e." European Physical Journal C 4, no. 1 (1998): 47. http://dx.doi.org/10.1007/s100520050185.

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13

GALLO, ELISABETTA. "EXPERIMENTAL RESULTS ON SEARCHES BEYOND THE STANDARD MODEL." International Journal of Modern Physics A 22, no. 30 (2007): 5513–22. http://dx.doi.org/10.1142/s0217751x07038773.

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Recent results for direct searches for physics beyond the Standard Model are reviewed. The results include Tevatron II data up to 1.2 fb-1 and HERA results up to 350 pb-1. Searches for Supersymmetry, for compositeness and for large extra dimensions are presented. The excess of events with an isolated lepton and high missing transverse momentum at HERA is discussed.

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14

Olsson, J. "Observation at HERA of events with an isolated charged lepton and large missing transverse momentum." Nuclear Physics B - Proceedings Supplements 82 (March 2000): 432–38. http://dx.doi.org/10.1016/s0920-5632(00)00190-0.

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15

Aaron, F. D., C. Alexa, V. Andreev, et al. "Events with isolated leptons and missing transverse momentum and measurement of W production at HERA." European Physical Journal C 64, no. 2 (2009): 251–71. http://dx.doi.org/10.1140/epjc/s10052-009-1160-6.

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16

collaboration, The CMS. "Performance of the CMS missing transverse momentum reconstruction in pp data at √s = 8 TeV." Journal of Instrumentation 10, no. 02 (2015): P02006. http://dx.doi.org/10.1088/1748-0221/10/02/p02006.

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17

Barger, V., K. Hagiwara, W. Y. Keung, R. J. N. Phillips, and J. Woodside. "Multijet events with missing transverse momentum from scalar-quark pair production at the CERNpp¯collider." Physical Review D 32, no. 3 (1985): 806–9. http://dx.doi.org/10.1103/physrevd.32.806.

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18

Adloff et al., C. "Observation of events with an isolated high energy lepton and missing transverse momentum at HERA." European Physical Journal C 5, no. 4 (1998): 575. http://dx.doi.org/10.1007/s100520050302.

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19

Adloff et al., C. "Observation of events with an isolated high energy lepton and missing transverse momentum at HERA." European Physical Journal C 5, no. 4 (1998): 575–84. http://dx.doi.org/10.1007/s100529800973.

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20

Pulido, Manuel. "A Simple Technique to Infer the Missing Gravity Wave Drag in the Middle Atmosphere Using a General Circulation Model: Potential Vorticity Budget." Journal of the Atmospheric Sciences 71, no. 2 (2014): 683–96. http://dx.doi.org/10.1175/jas-d-13-0198.1.

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Abstract A simple technique to infer the missing momentum forcing in a general circulation model is developed and evaluated. The response of the large-scale dynamic equations to an external momentum forcing presents a nonlocal response in the zonal and meridional wind. On the other hand, the response to the external momentum forcing in the potential vorticity (PV) is a local growing geostrophic mode, so that there is a direct relationship between the external momentum forcing and the response in PV. In this work, this fact is exploited to diagnose the missing momentum forcing in the extratropics using a general circulation model. The capability of the simple technique to estimate a concentrated gravity wave forcing is evaluated. A dynamical model is evolved with prescribed sources and sinks of PV and then the technique is used to estimate these known momentum sources and sinks. PV is found to give a much better diagnostic of gravity wave drag compared to the more traditional zonal wind differences. The technique is also used in a realistic environment, in which the sources and sinks of PV in Met Office analyses are determined. The estimation of this missing forcing with this simple technique is compared with the estimation given by a more complex data assimilation technique developed by Pulido and Thuburn and, in general, a good agreement is found. The simple gravity wave drag estimation technique can be used in an online data assimilation cycle, using the increments of the analysis, and also offline, using a general circulation model and observations.

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21

Vichou, Irene. "Performance of Missing Transverse Momentum Reconstruction in ATLAS with Proton-Proton Collisions at √s = 7 TeV." Journal of Physics: Conference Series 404 (December 21, 2012): 012011. http://dx.doi.org/10.1088/1742-6596/404/1/012011.

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22

Franceschini, Roberto. "Status of LHC Searches for SUSY without R-Parity." Advances in High Energy Physics 2015 (2015): 1–16. http://dx.doi.org/10.1155/2015/581038.

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In this contribution we briefly review the status of current searches for supersymmetry at the Large Hadron Collider, focusing especially on viable sub-TeV colored superpartners which can appear in nonstandard scenarios. The presented material covers mostly signals that do not crucially rely on the presence of large missing transverse momentum, with special emphasis on R-parity violating supersymmetry. For some scenarios the prospects for the next run of the Large Hadron Collider and future machines are also presented.

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23

Adachi, S. "Inclusive searches for squarks and gluinos with the ATLAS detector." EPJ Web of Conferences 182 (2018): 02001. http://dx.doi.org/10.1051/epjconf/201818202001.

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Despite the absence of experimental evidence, the weak scale supersymmetry remains as one of the best motivated and studied theoretical models beyond the Standard Model. This article summarises recent ATLAS results on inclusive searches for squarks and gluinos in R-parity conserving SUSY scenarios, including third generation squarks produced in the decay of gluinos. The searches involve final states containing jets, missing transverse momentum with and without a light lepton. No significance excess above the Standard Model prediction is observed and exclusion limits are set on 2-dimensional mass planes of benchmark signal models.

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24

ROMÃO, J. C., J. L. DIAZ-CRUZ, F. DE CAMPOS, and J. W. F. VALLE. "DETECTION OF INTERMEDIATE MASS HIGGS BOSONS FROM SPONTANEOUSLY BROKEN R-PARITY SUPERSYMMETRY." Modern Physics Letters A 09, no. 09 (1994): 817–27. http://dx.doi.org/10.1142/s0217732394000642.

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The Higgs sector in spontaneously broken R-parity supersymmetry (RPSUSY) shows interesting features that require new search techniques. Both the mass spectrum and production rates may differ from the Standard Model and minimal supersymmetric model (MSSM) expectations. For some parameter choices, the dominant Higgs boson decay mode can even be invisible, leading to events with large missing transverse momentum carried by superweakly interacting majorons. We study the reaction pp → Z + H + X, and find that it can lead to detectable events at LHC/SSC for a large region of parameter space.

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25

Khachatryan, V., A. M. Sirunyan, A. Tumasyan, et al. "Search for supersymmetry in the multijet and missing transverse momentum final state in pp collisions at 13 TeV." Physics Letters B 758 (July 2016): 152–80. http://dx.doi.org/10.1016/j.physletb.2016.05.002.

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26

Sirunyan, A. M., A. Tumasyan, W. Adam, et al. "Performance of missing transverse momentum reconstruction in proton-proton collisions at √s = 13 TeV using the CMS detector." Journal of Instrumentation 14, no. 07 (2019): P07004. http://dx.doi.org/10.1088/1748-0221/14/07/p07004.

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27

March, Luis. "Performance of missing transverse momentum reconstruction in ATLAS studied in proton-proton collisions in 2012 at 8 TeV." Journal of Physics: Conference Series 645 (October 15, 2015): 012014. http://dx.doi.org/10.1088/1742-6596/645/1/012014.

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28

Sirunyan, A. M., A. Tumasyan, W. Adam, et al. "Search for long-lived particles using nonprompt jets and missing transverse momentum with proton-proton collisions at s=13TeV." Physics Letters B 797 (October 2019): 134876. http://dx.doi.org/10.1016/j.physletb.2019.134876.

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29

Breitweg, J., S. Chekanov, M. Derrick, et al. "W production and the search for events with an isolated high-energy lepton and missing transverse momentum at HERA." Physics Letters B 471, no. 4 (2000): 411–28. http://dx.doi.org/10.1016/s0370-2693(99)01358-1.

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30

Chekanov, S., M. Derrick, S. Magill, et al. "Search for events with an isolated lepton and missing transverse momentum and a measurement of W production at HERA." Physics Letters B 672, no. 2 (2009): 106–15. http://dx.doi.org/10.1016/j.physletb.2009.01.014.

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31

BEAUCHEMIN, PIERRE-HUGUES, and REYHANEH REZVANI. "MONOJET EVENTS: FROM DARK MATTER TO EXTRA DIMENSIONS, A SEARCH FOR THE EXOTICS USING THE STANDARD MODEL." International Journal of Modern Physics A 28, no. 08 (2013): 1330012. http://dx.doi.org/10.1142/s0217751x13300123.

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Monojet events consist in event topologies with a high transverse momentum jet and a large amount of missing transverse energy. They constitute a promising final state that could lead to phenomena beyond the Standard Model. The theoretical models giving rise to such a signature include the pair production of Weakly Interacting Massive Particles, as dark matter candidates, and models of large extra dimensions. Monojet events can even be used to measure the Standard Model properties of Z boson decays, provided that the precision of the analysis is high enough. Such precision can be achieved by using data-driven determinations of the Standard Model contributions to monojet events. Exotics searches for new physics in such a final state have been performed at all high energy hadronic collider experiments since SPS. The ATLAS and CMS analyses with 7 TeV LHC data provide the latest and most useful information obtained from monojet studies. Their results are presented and discussed in this review paper.

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32

Aad, G., T. Abajyan, B. Abbott, et al. "Search for diphoton events with large missing transverse momentum in 7 TeV proton–proton collision data with the ATLAS detector." Physics Letters B 718, no. 2 (2012): 411–30. http://dx.doi.org/10.1016/j.physletb.2012.10.069.

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33

Dietrich, Janet. "Search for electroweak supersymmetric particle production in final states with two leptons and missing transverse momentum with the ATLAS detector." Nuclear and Particle Physics Proceedings 273-275 (April 2016): 2409–11. http://dx.doi.org/10.1016/j.nuclphysbps.2015.09.408.

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34

Sirunyan, A. M., A. Tumasyan, W. Adam, et al. "Search for dark matter in events with a leptoquark and missing transverse momentum in proton-proton collisions at 13 TeV." Physics Letters B 795 (August 2019): 76–99. http://dx.doi.org/10.1016/j.physletb.2019.05.046.

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35

Aad, G., B. Abbott, J. Abdallah, et al. "Search for supersymmetry in pp collisions at s=7 TeV in final states with missing transverse momentum and b-jets." Physics Letters B 701, no. 4 (2011): 398–416. http://dx.doi.org/10.1016/j.physletb.2011.06.015.

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36

Khachatryan, V., A. M. Sirunyan, A. Tumasyan, et al. "Search for supersymmetry in events with a photon, a lepton, and missing transverse momentum in pp collisions at s=8 TeV." Physics Letters B 757 (June 2016): 6–31. http://dx.doi.org/10.1016/j.physletb.2016.03.039.

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37

Khachatryan, V., A. M. Sirunyan, A. Tumasyan, et al. "Search for heavy gauge W′ bosons in events with an energetic lepton and large missing transverse momentum at s=13 TeV." Physics Letters B 770 (July 2017): 278–301. http://dx.doi.org/10.1016/j.physletb.2017.04.043.

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38

Martínez, Mario. "Search for new phenomena in events with a monojet and large missing transverse momentum at the LHC using the ATLAS detector." EPJ Web of Conferences 28 (2012): 12015. http://dx.doi.org/10.1051/epjconf/20122812015.

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39

Meloni, Federico. "Searches for Direct Pair Production of Third Generation Squarks with the ATLAS Detector." International Journal of Modern Physics: Conference Series 46 (January 2018): 1860057. http://dx.doi.org/10.1142/s2010194518600571.

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This document summarises recent ATLAS results for searches for third generation squarks using 36.1 [Formula: see text] of LHC proton-proton collision data collected at [Formula: see text] TeV. Despite the absence of experimental evidence, weak scale supersymmetry remains one of the best motivated and studied Standard Model extensions. Supersymmetry can naturally solve the Standard Model hierarchy problem by preventing a large fine-tuning in the Higgs sector: a typical natural SUSY spectrum contains light third generation squarks (stops and sbottoms). Both R-Parity conserving and R-Parity violating scenarios are considered. The searches involve final states including jets, missing transverse momentum, electrons or muons. Simplified models predicting pair production of third generation squarks have been excluded at 95% CL up to about one TeV in the most favourable scenarios.

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40

Sirunyan, A. M., A. Tumasyan, W. Adam, et al. "Search for gauge-mediated supersymmetry in events with at least one photon and missing transverse momentum in pp collisions at s=13TeV." Physics Letters B 780 (May 2018): 118–43. http://dx.doi.org/10.1016/j.physletb.2018.02.045.

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41

Aad, G., B. Abbott, J. Abdallah, et al. "Search for new phenomena with the monojet and missing transverse momentum signature using the ATLAS detector in s=7TeV proton–proton collisions." Physics Letters B 705, no. 4 (2011): 294–312. http://dx.doi.org/10.1016/j.physletb.2011.10.006.

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42

Kon, Tadashi, Takashi Matsushita, and Tetsuro Kobayashi. "Possible Excess in Charged Current Events with High-Q2 at HERA from Stop and Sbottom Production." Modern Physics Letters A 12, no. 40 (1997): 3143–52. http://dx.doi.org/10.1142/s0217732397003265.

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We investigate a production process [Formula: see text] at HERA, where we consider a decay mode [Formula: see text] of the sbottom in the framework of an R-parity breaking supersymmetric standard model. Both processes of the stop production [Formula: see text] and the sbottom decay [Formula: see text] are originated from an R-parity breaking superpotential [Formula: see text]. One of the signatures of the process should be a large missing transverse momentum plus multijet events corresponding to hadronic decays of the W. It is shown that the signal could appear as an event excess in the charged current (CC) processes e+p→ν X with the high Q2 at HERA. We compare the expected event distributions with the CC data recently reported by the H1 and ZEUS groups at HERA. Methods for extracting the signal from the standard CC processes are also discussed.

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43

Khachatryan, V., A. M. Sirunyan, A. Tumasyan, et al. "Search for stealth supersymmetry in events with jets, either photons or leptons, and low missing transverse momentum in pp collisions at 8 TeV." Physics Letters B 743 (April 2015): 503–25. http://dx.doi.org/10.1016/j.physletb.2015.03.017.

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44

Sirunyan, A. M., A. Tumasyan, W. Adam, et al. "Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton–proton collisions at s=13TeV." Physics Letters B 782 (July 2018): 440–67. http://dx.doi.org/10.1016/j.physletb.2018.05.062.

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45

Aad, G., B. Abbott, D. C. Abbott, et al. "Search for a scalar partner of the top quark in the all-hadronic $$t{\bar{t}}$$ plus missing transverse momentum final state at $$\sqrt{s}=13$$ TeV with the ATLAS detector." European Physical Journal C 80, no. 8 (2020). http://dx.doi.org/10.1140/epjc/s10052-020-8102-8.

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Abstract A search for direct pair production of scalar partners of the top quark (top squarks or scalar third-generation up-type leptoquarks) in the all-hadronic $$t{\bar{t}}$$tt¯ plus missing transverse momentum final state is presented. The analysis of 139 $$\hbox {fb}^{-1}$$fb-1 of $${\sqrt{s}=13}$$s=13 TeV proton–proton collision data collected using the ATLAS detector at the LHC yields no significant excess over the Standard Model background expectation. To interpret the results, a supersymmetric model is used where the top squark decays via $${\tilde{t}} \rightarrow t^{(*)} {\tilde{\chi }}^0_1$$t~→t(∗)χ~10, with $$t^{(*)}$$t(∗) denoting an on-shell (off-shell) top quark and $${\tilde{\chi }}^0_1$$χ~10 the lightest neutralino. Three specific event selections are optimised for the following scenarios. In the scenario where $$m_{{\tilde{t}}}> m_t+m_{{\tilde{\chi }}^0_1}$$mt~>mt+mχ~10, top squark masses are excluded in the range 400–1250 GeV for $${\tilde{\chi }}^0_1$$χ~10 masses below 200 GeV at 95% confidence level. In the situation where $$m_{{\tilde{t}}}\sim m_t+m_{{\tilde{\chi }}^0_1}$$mt~∼mt+mχ~10, top squark masses in the range 300–630 GeV are excluded, while in the case where $$m_{{\tilde{t}}}< m_W+m_b+m_{{\tilde{\chi }}^0_1}$$mt~<mW+mb+mχ~10 (with $$m_{{\tilde{t}}}-m_{{\tilde{\chi }}^0_1}\ge 5$$mt~-mχ~10≥5 GeV), considered for the first time in an ATLAS all-hadronic search, top squark masses in the range 300–660 GeV are excluded. Limits are also set for scalar third-generation up-type leptoquarks, excluding leptoquarks with masses below 1240 GeV when considering only leptoquark decays into a top quark and a neutrino.

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46

Ebert, Markus A., Bernhard Mistlberger, and Gherardo Vita. "Transverse momentum dependent PDFs at N3LO." Journal of High Energy Physics 2020, no. 9 (2020). http://dx.doi.org/10.1007/jhep09(2020)146.

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Abstract We compute the quark and gluon transverse momentum dependent parton distribution functions at next-to-next-to-next-to-leading order (N3LO) in perturbative QCD. Our calculation is based on an expansion of the differential Drell-Yan and gluon fusion Higgs production cross sections about their collinear limit. This method allows us to employ cutting edge multiloop techniques for the computation of cross sections to extract these universal building blocks of the collinear limit of QCD. The corresponding perturbative matching kernels for all channels are expressed in terms of simple harmonic polylogarithms up to weight five. As a byproduct, we confirm a previous computation of the soft function for transverse momentum factorization at N3LO. Our results are the last missing ingredient to extend the qT subtraction methods to N3LO and to obtain resummed qT spectra at N3LL′ accuracy both for gluon as well as for quark initiated processes.

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47

Sirunyan, A. M., A. Tumasyan, W. Adam, et al. "Search for supersymmetry in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV in events with high-momentum Z bosons and missing transverse momentum." Journal of High Energy Physics 2020, no. 9 (2020). http://dx.doi.org/10.1007/jhep09(2020)149.

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Abstract A search for new physics in events with two highly Lorentz-boosted Z bosons and large missing transverse momentum is presented. The analyzed proton-proton collision data, corresponding to an integrated luminosity of 137 fb−1, were recorded at $$ \sqrt{s} $$ s = 13 TeV by the CMS experiment at the CERN LHC. The search utilizes the substructure of jets with large radius to identify quark pairs from Z boson decays. Backgrounds from standard model processes are suppressed by requirements on the jet mass and the missing transverse momentum. No significant excess in the event yield is observed beyond the number of background events expected from the standard model. For a simplified supersymmetric model in which the Z bosons arise from the decay of gluinos, an exclusion limit of 1920 GeV on the gluino mass is set at 95% confidence level. This is the first search for beyond-standard-model production of pairs of boosted Z bosons plus large missing transverse momentum.

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48

Sirunyan, A. M., A. Tumasyan, W. Adam, et al. "Study of central exclusive "Equation missing" No EquationSource Format="TEX", only image production in proton-proton collisions at $$\sqrt{s} = 5.02$$ and 13TeV." European Physical Journal C 80, no. 8 (2020). http://dx.doi.org/10.1140/epjc/s10052-020-8166-5.

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Abstract Central exclusive and semiexclusive production of "Equation missing" pairs is measured with the CMS detector in proton-proton collisions at the LHC at center-of-mass energies of 5.02 and 13TeV. The theoretical description of these nonperturbative processes, which have not yet been measured in detail at the LHC, poses a significant challenge to models. The two pions are measured and identified in the CMS silicon tracker based on specific energy loss, whereas the absence of other particles is ensured by calorimeter information. The total and differential cross sections of exclusive and semiexclusive central "Equation missing" production are measured as functions of invariant mass, transverse momentum, and rapidity of the "Equation missing" system in the fiducial region defined as transverse momentum "Equation missing" and pseudorapidity "Equation missing". The production cross sections for the four resonant channels "Image missing" , "Equation missing", "Image missing" , and "Image missing" are extracted using a simple model. These results represent the first measurement of this process at the LHC collision energies of 5.02 and 13TeV.

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49

Mrowietz, Malte, Sam Bein, and Jory Sonneveld. "Implementation of the CMS-SUS-19-006 analysis in the MadAnalysis 5 framework (supersymmetry with large hadronic activity and missing transverse energy; 137 fb−1)." Modern Physics Letters A, December 30, 2020, 2141007. http://dx.doi.org/10.1142/s0217732321410078.

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We present the MadAnalysis 5 implementation and validation of the analysis Search for supersymmetry in proton-proton collisions at 13 TeV in final states with jets and missing transverse momentum (CMS-SUS-19-006). The search targets signatures with at least two jets and large missing transverse momentum in the all-hadronic final state. The analyzed luminosity is 137 fb[Formula: see text], corresponding to the Run 2 proton-proton data set recorded by the CMS detector at 13 TeV. This implementation has been validated in a variety of simplified models, by comparing derived cut flow tables and histograms with information provided by the CMS collaboration, using event samples that we simulated for the purpose of this re-implementation study. The validation is found to reproduce the signal acceptance in most cases.

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Liu, DianYu, ChuanLe Sun, and Jun Gao. "Constraints on neutrino non-standard interactions from LHC data with large missing transverse momentum." Journal of High Energy Physics 2021, no. 2 (2021). http://dx.doi.org/10.1007/jhep02(2021)033.

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Abstract The possible non-standard interactions (NSIs) of neutrinos with matter plays important role in the global determination of neutrino properties. In our study we select various data sets from LHC measurements at 13 TeV with integrated luminosities of 35 ∼ 139 fb−1, including production of a single jet, photon, W/Z boson, or charged lepton accompanied with large missing transverse momentum. We derive constraints on neutral-current NSIs with quarks imposed by different data sets in a framework of either effective operators or simplified Z′ models. We use theoretical predictions of productions induced by NSIs at next-to-leading order in QCD matched with parton showering which stabilize the theory predictions and result in more robust constraints. In a simplified Z′ model we obtain a 95% CLs upper limit on the conventional NSI strength ϵ of 0.042 and 0.0028 for a Z′ mass of 0.2 and 2 TeV respectively. We also discuss possible improvements from future runs of LHC with higher luminosities.

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