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Interpreting a CMS $lljjp_T^{\rm miss}$ Excess With the Golden Cascade of the MSSM

CMS recently reported an excess consistent with an invariant mass edge in opposite-sign same flavor (OSSF) leptons, when produced in conjunction with at least two jets and missing transverse momentum. We provide an interpretation of the edge in terms of (anti-)squark pair production followed by the...

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Detalles Bibliográficos
Autores principales: Allanach, Ben, Raklev, Are R, Kvellestad, Anders
Lenguaje:eng
Publicado: 2014
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.91.115022
http://cds.cern.ch/record/1755382
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author Allanach, Ben
Raklev, Are R
Kvellestad, Anders
author_facet Allanach, Ben
Raklev, Are R
Kvellestad, Anders
author_sort Allanach, Ben
collection CERN
description CMS recently reported an excess consistent with an invariant mass edge in opposite-sign same flavor (OSSF) leptons, when produced in conjunction with at least two jets and missing transverse momentum. We provide an interpretation of the edge in terms of (anti-)squark pair production followed by the `golden cascade' decay for one of the squarks: $\tilde q \rightarrow \tilde\chi_2^0 q \to \tilde l l q \to \tilde\chi_1^0 q l l$ in the minimal supersymmetric standard model (MSSM). A simplified model involving binos, winos, an on-shell slepton, and the first two generations of squarks fits the event rate and the invariant mass edge while passing current collider constraints. We present the good-fit parameter space of the model, along with squark production predictions for LHC Run II conducted at 13 TeV centre of mass energy. Portions of the good-fit parameter space also predict a thermal relic density of neutralino dark matter $(\Omega h^2)$ compatible with cosmological observations, and an anomalous magnetic moment of the muon $(g-2)_\mu$ compatible with measurements.
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institution Organización Europea para la Investigación Nuclear
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spelling cern-17553822021-05-03T20:09:50Zdoi:10.1103/PhysRevD.91.115022http://cds.cern.ch/record/1755382engAllanach, BenRaklev, Are RKvellestad, AndersInterpreting a CMS $lljjp_T^{\rm miss}$ Excess With the Golden Cascade of the MSSMParticle Physics - PhenomenologyCMS recently reported an excess consistent with an invariant mass edge in opposite-sign same flavor (OSSF) leptons, when produced in conjunction with at least two jets and missing transverse momentum. We provide an interpretation of the edge in terms of (anti-)squark pair production followed by the `golden cascade' decay for one of the squarks: $\tilde q \rightarrow \tilde\chi_2^0 q \to \tilde l l q \to \tilde\chi_1^0 q l l$ in the minimal supersymmetric standard model (MSSM). A simplified model involving binos, winos, an on-shell slepton, and the first two generations of squarks fits the event rate and the invariant mass edge while passing current collider constraints. We present the good-fit parameter space of the model, along with squark production predictions for LHC Run II conducted at 13 TeV centre of mass energy. Portions of the good-fit parameter space also predict a thermal relic density of neutralino dark matter $(\Omega h^2)$ compatible with cosmological observations, and an anomalous magnetic moment of the muon $(g-2)_\mu$ compatible with measurements.arXiv:1409.3532DAMTP-2014-52oai:cds.cern.ch:17553822014-09-11
spellingShingle Particle Physics - Phenomenology
Allanach, Ben
Raklev, Are R
Kvellestad, Anders
Interpreting a CMS $lljjp_T^{\rm miss}$ Excess With the Golden Cascade of the MSSM
title Interpreting a CMS $lljjp_T^{\rm miss}$ Excess With the Golden Cascade of the MSSM
title_full Interpreting a CMS $lljjp_T^{\rm miss}$ Excess With the Golden Cascade of the MSSM
title_fullStr Interpreting a CMS $lljjp_T^{\rm miss}$ Excess With the Golden Cascade of the MSSM
title_full_unstemmed Interpreting a CMS $lljjp_T^{\rm miss}$ Excess With the Golden Cascade of the MSSM
title_short Interpreting a CMS $lljjp_T^{\rm miss}$ Excess With the Golden Cascade of the MSSM
title_sort interpreting a cms $lljjp_t^{\rm miss}$ excess with the golden cascade of the mssm
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.91.115022
http://cds.cern.ch/record/1755382
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AT kvellestadanders interpretingacmslljjptrmmissexcesswiththegoldencascadeofthemssm