Search for gluino mediated bottom- and top-squark production in multijet final states in pp collisions at 8 TeV

By S. Chatrchyan, V. Khachatryan, A. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, C. Fabjan, M. Friedl and 2,170 more. 2013

135 citations recorded by the source corpus.

A search for supersymmetry is presented based on events with large missing transverse energy, no isolated electron or muon, and at least three jets with one or more identified as a bottom-quark jet. A simultaneous examination is performed of the numbers of events in exclusive bins of the scalar sum of jet transverse momentum values, missing transverse energy, and bottom-quark jet multiplicity. The sample, corresponding to an integrated luminosity of 19.4 inverse femtobarns, consists of proton-proton collision data recorded at a center-of-mass energy of 8 TeV with the CMS detector at the LHC in 2012. The observed numbers of events are found to be consistent with the standard model expectation, which is evaluated with control samples in data. The results are interpreted in the context of two simplified supersymmetric scenarios in which gluino pair production is followed by the decay of each gluino to an undetected lightest supersymmetric particle and either a bottom or top quark-antiquark pair, characteristic of gluino mediated bottom- or top-squark production. Using the production cross section calculated to next-to-leading-order plus next-to-leading-logarithm accuracy, and in the limit of a massless lightest supersymmetric particle, we exclude gluinos with masses below 1170 GeV and 1020 GeV for the two scenarios, respectively.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/21557420595b59a4290427a2440a1748009d7fd5

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In Nuclear and High Energy Physics

Citations in the corpus

Search for supersymmetry in multijet events with missing transverse momentum in proton-proton collisions at 13 TeV (2017, methodology): “We employ two methods, complementary to each other, to evaluate the QCD background: the rebalance-andsmear (R&S) method [21, 22] and the low-∆φ extrapolation method [17, 76].”
Search for new physics in the multijet and missing transverse momentum final state in proton-proton collisions at $ \sqrt{s} $ = 8 TeV (2014, background): “While other analyses exploit the presence of bottom-quark jets in signal events to discriminate against background [12, 13], this analysis follows a complementary strategy by requiring a large number of jets, thus helping to keep the signal efficiency for fully hadronic final states as high as possi”