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Title: Searches for supersymmetry using the M$$_{T2}$$ variable in hadronic events produced in pp collisions at 8 TeV

Abstract

Searches for supersymmetry (SUSY) are performed using a sample of hadronic events produced in 8 TeV pp collisions at the CERN LHC. The searches are based on the M$$_{T2}$$ variable, which is a measure of the transverse momentum imbalance in an event. The data were collected with the CMS detector and correspond to an integrated luminosity of 19.5 fb1. Two related searches are performed. The first is an inclusive search based on signal regions defined by the value of the M$$_{T2}$$ variable, the hadronic energy in the event, the jet multiplicity, and the number of jets identified as originating from bottom quarks. The second is a search for a mass peak corresponding to a Higgs boson decaying to a bottom quark-antiquark pair, where the Higgs boson is produced as a decay product of a SUSY particle. For both searches, the principal backgrounds are evaluated with data control samples. No significant excess over the expected number of background events is observed, and exclusion limits on various SUSY models are derived.

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1221262
Report Number(s):
FERMILAB-PUB-15-067-CMS; CERN-PH-EP-2015-017; CMS-SUS-13-019
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1502.04358; TRN: US1500726
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 5; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Khachatryan, V. Searches for supersymmetry using the M$_{T2}$ variable in hadronic events produced in pp collisions at 8 TeV. United States: N. p., 2015. Web. doi:10.1007/JHEP05(2015)078.
Khachatryan, V. Searches for supersymmetry using the M$_{T2}$ variable in hadronic events produced in pp collisions at 8 TeV. United States. https://doi.org/10.1007/JHEP05(2015)078
Khachatryan, V. Fri . "Searches for supersymmetry using the M$_{T2}$ variable in hadronic events produced in pp collisions at 8 TeV". United States. https://doi.org/10.1007/JHEP05(2015)078. https://www.osti.gov/servlets/purl/1221262.
@article{osti_1221262,
title = {Searches for supersymmetry using the M$_{T2}$ variable in hadronic events produced in pp collisions at 8 TeV},
author = {Khachatryan, V.},
abstractNote = {Searches for supersymmetry (SUSY) are performed using a sample of hadronic events produced in 8 TeV pp collisions at the CERN LHC. The searches are based on the M$_{T2}$ variable, which is a measure of the transverse momentum imbalance in an event. The data were collected with the CMS detector and correspond to an integrated luminosity of 19.5 fb1. Two related searches are performed. The first is an inclusive search based on signal regions defined by the value of the M$_{T2}$ variable, the hadronic energy in the event, the jet multiplicity, and the number of jets identified as originating from bottom quarks. The second is a search for a mass peak corresponding to a Higgs boson decaying to a bottom quark-antiquark pair, where the Higgs boson is produced as a decay product of a SUSY particle. For both searches, the principal backgrounds are evaluated with data control samples. No significant excess over the expected number of background events is observed, and exclusion limits on various SUSY models are derived.},
doi = {10.1007/JHEP05(2015)078},
journal = {Journal of High Energy Physics (Online)},
number = 5,
volume = 2015,
place = {United States},
year = {Fri May 15 00:00:00 EDT 2015},
month = {Fri May 15 00:00:00 EDT 2015}
}

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Figures / Tables:

Figure 1 Figure 1: Definition of the topological signal regions in terms of the number of jets $N$j and the number of b-tagged jets $N$b (left), and their subsequent division in terms of $H$T and $E^{miss}_{T}$ (right). The pie charts illustrate the expected contributions from different SM processes in the different signalmore » regions; they are similar in all three $H$T regions.« less

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