Search for long-lived particles in events with photons and missing energy in proton-proton collisions at root s=7 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
03/12/2014
03/12/2014
24/05/2013
|
Resumo |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Results are presented from a search for long-lived neutralinos decaying into a photon and an invisible particle, a signature associated with gauge-mediated supersymmetry breaking in supersymmetric models. The analysis is based on a 4.9 fb(-1) sample of proton-proton collisions at root s = 7 TeV, collected with the CMS detector at the LHC. The missing transverse energy and the time of arrival of the photon at the electromagnetic calorimeter are used to search for an excess of events over the expected background. No significant excess is observed, and lower limits at the 95% confidence level are obtained on the mass of the lightest neutralino, m > 220 GeV (for c tau < 500 mm), as well as on the proper decay length of the lightest neutralino, c tau > 6000 mm (for m < 150 GeV). (c) 2013 CERN. Published by Elsevier B.V. All rights reserved. |
Formato |
273-294 |
Identificador |
http://dx.doi.org/10.1016/j.physletb.2013.04.027 Physics Letters B. Amsterdam: Elsevier Science Bv, v. 722, n. 4-5, p. 273-294, 2013. 0370-2693 http://hdl.handle.net/11449/111316 10.1016/j.physletb.2013.04.027 WOS:000319638000005 WOS000319638000005.pdf |
Idioma(s) |
eng |
Publicador |
Elsevier B.V. |
Relação |
Physics Letters B |
Direitos |
openAccess |
Palavras-Chave | #CMS #LHC #SUSY #Exotica #GMSB #Long-lived #Photons #Displaced |
Tipo |
info:eu-repo/semantics/article |