Publication
Title
Search for supersymmetry in events with soft leptons, low jet multiplicity, and missing transverse energy in proton-proton collisions at root s=8 TeV
Author
Institution/Organisation
Cms Collaboration
Abstract
Results are presented from a search for super symmetric particles in scenarios with small mass splittings. The data sample corresponds to 19.7 fb(-1) of proton-proton collisions recorded by the CMS experiment at root s = 8 TeV. The search targets top squark ((t) over tilde) pair production in scenarios with mass differences Delta m = m((t) over tilde) - m((chi) over tilde (0)(1)) below the W-boson mass and with top-squark decays in the four-body mode ((t) over tilde -> bl nu(chi) over tilde (0)(1)), where the neutralino ((chi) over tilde (0)(1)) is assumed to be the lightest supersymmetric particle (LSP). The signature includes a high transverse momentum (p(T)) jet associated with initial-state radiation, one or two low-p(T) leptons, and significant missing transverse energy. The event yields observed in data are consistent with the expected background contributions from standard model processes. Limits are set on the cross section for top squark pair production as a function of the (t) over tilde t and LSP masses. Assuming a 100% branching fraction for the four-body decay mode, top-squark masses below 316 GeV are excluded for Delta m = 25 GeV at 95% CL. The dilepton data are also interpreted under the assumption of chargino-neutralino production, with subsequent decays to sleptons or sneutrinos. Assuming a difference between the common ($) over tilde (+)(1)/(chi) over tilde (0)(2) mass and the LSP mass of 20 GeV and a tau-enriched decay scenario, masses in the range m((chi) over tilde (+)(1)) < 307 GeV are excluded at 95% CL. (C) 2016 The Author. Published by Elsevier B.V.
Language
English
Source (journal)
Physics letters : B. - Amsterdam, 1967, currens
Publication
Amsterdam : North-Holland , 2016
ISSN
0370-2693
DOI
10.1016/J.PHYSLETB.2016.05.033
Volume/pages
759 (2016) , p. 9-35
ISI
000380409200002
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 10.01.2017
Last edited 09.10.2023
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