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Search for new physics in events with two low momentum opposite-sign leptons and missing transverse energy at $\sqrt{s}=13~\mathrm{TeV}$

A search for new physics in events with low-momentum opposite-sign leptons and missing transverse momentum, using $35.9~\mathrm{fb}^{-1}$ of integrated luminosity collected by CMS experiment at $\sqrt{s}=13~\mathrm{TeV}$, is presented. The data observed are consistent with expectations from the stan...

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Autor principal: CMS Collaboration
Publicado: 2017
Materias:
Acceso en línea:http://cds.cern.ch/record/2256640
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author CMS Collaboration
author_facet CMS Collaboration
author_sort CMS Collaboration
collection CERN
description A search for new physics in events with low-momentum opposite-sign leptons and missing transverse momentum, using $35.9~\mathrm{fb}^{-1}$ of integrated luminosity collected by CMS experiment at $\sqrt{s}=13~\mathrm{TeV}$, is presented. The data observed are consistent with expectations from the standard model. The results are interpreted in terms of pair production of charginos and neutralinos ($\tilde{\chi}_1^{\pm}$, $\tilde{\chi}_2^{0}$) with nearly degenerate masses, as expected in natural compressed higgsino models, and in terms of the pair production of top squarks for the case that the neutralino and the top squark have similar masses. At $95\%$ confidence level, $\tilde{\chi}_1^{\pm}$/$\tilde{\chi}_2^{0}$ are excluded for masses up to $230~\mathrm{GeV}$ for a mass difference of $20~\mathrm{GeV}$ with respect to the lightest neutralino, which is a region constrained so far by the LEP experiments only. An interpretation is also provided in terms of top squark ($\tilde{t}$) pair production processes with degenerate mass spectra and chargino-mediated decays. Masses of the $\tilde{t}$ up to $450~\mathrm{GeV}$ are excluded for a mass difference of $40~\mathrm{GeV}$ with respect to the lightest neutralino.
id cern-2256640
institution Organización Europea para la Investigación Nuclear
publishDate 2017
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spelling cern-22566402019-09-30T06:29:59Zhttp://cds.cern.ch/record/2256640CMS CollaborationSearch for new physics in events with two low momentum opposite-sign leptons and missing transverse energy at $\sqrt{s}=13~\mathrm{TeV}$Particle Physics - ExperimentA search for new physics in events with low-momentum opposite-sign leptons and missing transverse momentum, using $35.9~\mathrm{fb}^{-1}$ of integrated luminosity collected by CMS experiment at $\sqrt{s}=13~\mathrm{TeV}$, is presented. The data observed are consistent with expectations from the standard model. The results are interpreted in terms of pair production of charginos and neutralinos ($\tilde{\chi}_1^{\pm}$, $\tilde{\chi}_2^{0}$) with nearly degenerate masses, as expected in natural compressed higgsino models, and in terms of the pair production of top squarks for the case that the neutralino and the top squark have similar masses. At $95\%$ confidence level, $\tilde{\chi}_1^{\pm}$/$\tilde{\chi}_2^{0}$ are excluded for masses up to $230~\mathrm{GeV}$ for a mass difference of $20~\mathrm{GeV}$ with respect to the lightest neutralino, which is a region constrained so far by the LEP experiments only. An interpretation is also provided in terms of top squark ($\tilde{t}$) pair production processes with degenerate mass spectra and chargino-mediated decays. Masses of the $\tilde{t}$ up to $450~\mathrm{GeV}$ are excluded for a mass difference of $40~\mathrm{GeV}$ with respect to the lightest neutralino.CMS-PAS-SUS-16-048oai:cds.cern.ch:22566402017
spellingShingle Particle Physics - Experiment
CMS Collaboration
Search for new physics in events with two low momentum opposite-sign leptons and missing transverse energy at $\sqrt{s}=13~\mathrm{TeV}$
title Search for new physics in events with two low momentum opposite-sign leptons and missing transverse energy at $\sqrt{s}=13~\mathrm{TeV}$
title_full Search for new physics in events with two low momentum opposite-sign leptons and missing transverse energy at $\sqrt{s}=13~\mathrm{TeV}$
title_fullStr Search for new physics in events with two low momentum opposite-sign leptons and missing transverse energy at $\sqrt{s}=13~\mathrm{TeV}$
title_full_unstemmed Search for new physics in events with two low momentum opposite-sign leptons and missing transverse energy at $\sqrt{s}=13~\mathrm{TeV}$
title_short Search for new physics in events with two low momentum opposite-sign leptons and missing transverse energy at $\sqrt{s}=13~\mathrm{TeV}$
title_sort search for new physics in events with two low momentum opposite-sign leptons and missing transverse energy at $\sqrt{s}=13~\mathrm{tev}$
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2256640
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