Abstract
A search for supersymmetry is presented based on multijet events with large missing transverse momentum produced in proton-proton collisions at a center-of-mass energy of s=13 TeV. The data, corresponding to an integrated luminosity of 35.9 fb−1, were collected with the CMS detector at the CERN LHC in 2016. The analysis utilizes four-dimensional exclusive search regions defined in terms of the number of jets, the number of tagged bottom quark jets, the scalar sum of jet transverse momenta, and the magnitude of the vector sum of jet transverse momenta. No evidence for a significant excess of events is observed relative to the expectation from the standard model. Limits on the cross sections for the pair production of gluinos and squarks are derived in the context of simplified models. Assuming the lightest supersymmetric particle to be a weakly interacting neutralino, 95% confidence level lower limits on the gluino mass as large as 1800 to 1960 GeV are derived, and on the squark mass as large as 960 to 1390 GeV, depending on the production and decay scenario.6 MoreReceived 25 April 2017DOI:https://doi.org/10.1103/PhysRevD.96.032003Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.© 2017 CERN, for the CMS CollaborationPhysics Subject Headings (PhySH)Research AreasHadron-hadron interactionsParticle productionSupersymmetryParticles & Fields
Highlights
The standard model (SM) of particle physics describes many aspects of weak, electromagnetic, and strong interactions
Significant HmT iss in quantum chromodynamics (QCD) events is mostly the consequence of mismeasured jet pT, but it can arise if an event contains a charm or bottom quark that decays semileptonically
Individual particles are reconstructed with the CMS particle-flow (PF) algorithm [30], which identifies them as photons, charged hadrons, neutral hadrons, electrons, or muons
Summary
The standard model (SM) of particle physics describes many aspects of weak, electromagnetic, and strong interactions. T5qqqqVV scenario [Fig. 1 (lower left)], each gluino decays to a light-flavored qqpair and either to the nextto-lightest neutralino. T2tt scenario [Fig. 1 (lower right)], top squark-antisquark production is followed by the decay of each squark to a top quark and the χ~01. Top quark and W þ jets events can exhibit significant HmT iss and contribute to the background if a W boson decays to a neutrino and an undetected or out-ofacceptance charged lepton. Signal event candidates were recorded by requiring HmT iss at the trigger level to exceed a threshold that varied between 100 and 120 GeV depending on the LHC instantaneous luminosity The efficiency of this trigger, which exceeds 98% following application of the event selection criteria described below, is measured in data and is taken into account in the analysis. Additional triggers, requiring the presence of charged leptons, photons, or minimum values of HT, are used to select samples employed in the evaluation of backgrounds, as described below
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