Search for new physics in same-sign dilepton events in proton–proton collisions at √s = 13 TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/106694

Title:	Search for new physics in same-sign dilepton events in proton–proton collisions at √s = 13 TeV
Authors:	余欣珊;Khachatryan, Vardan
Contributors:	理學院物理學系
Date:	2016-08-01
Issue Date:	2026-04-23 13:36:37 (UTC+8)
Publisher:	Springer New York;United States: Springer
Abstract:	摘要： A search for new physics is performed using events with two isolated same-sign leptons, two or more jets, and missing transverse momentum. The results are based on a sample of proton-proton collisions at a center-of-mass energy of 13 TeV recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 2.3 fb1. Multiple search regions are defined by classifying events in terms of missing transverse momentum, the scalar sum of jet transverse momenta, the transverse mass associated with a W boson candidate, the number of jets, the number of b quark jets, and the transverse momenta of the leptons in the event. The analysis is sensitive to a wide variety of possible signals beyond the standard model. No excess above the standard model background expectation is observed. Constraints are set on various supersymmetric models, with gluinos and bottom squarks excluded for masses up to 1300 and 680 GeV, respectively, at the 95% confidence level. Upper limits on the cross sections for the production of two top quark-antiquark pairs (119 fb) and two same-sign top quarks (1.7 pb) are also obtained. Furthermore, selection efficiencies and model independent limits are provided to allow further interpretations of the results. 出版者： United States: Springer 出版日期： 2016-08-05 出處： The European physical journal. C, Particles and fields, 2016-08, Vol.76 (8) 資源來源： Publicly Available Content Database 識別號： ISSN: 1434-6044 識別號： DOI: 10.1140/epjc/s10052-016-4261-z
Appears in Collections:	[Department of Physics] journal & Dissertation

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