Search for a Higgs boson decaying into a Z and a photon in pp collisions at root s=7 and 8 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
03/12/2014
03/12/2014
04/11/2013
|
Resumo |
A search for a Higgs boson decaying into a Z boson and a photon is described. The analysis is performed using proton-proton collision datasets recorded by the CMS detector at the LHC. Events were collected at center-of-mass energies of 7 TeV and 8 TeV, corresponding to integrated luminosities of 5.0 fb(-1) and 19.6 fb(-1), respectively. The selected events are required to have opposite-sign electron or muon pairs. No excess above standard model predictions has been found in the 120-160 GeV mass range and the first limits on the Higgs boson production cross section times the H -> Z gamma branching fraction at the LHC have been derived. The observed at 95% confidence level limits are between about 4 and 25 times the standard model cross section times the branching fraction. For a standard model Higgs boson mass of 125 GeV the expected limit at the 95% confidence level is 10 and the observed limit is 9.5. Models predicting the Higgs boson production cross section times the H -> Z gamma branching fraction to be larger than one order of magnitude of the standard model prediction are excluded for most of the 125-157 GeV mass range. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved. |
Formato |
587-609 |
Identificador |
http://dx.doi.org/10.1016/j.physletb.2013.09.057 Physics Letters B. Amsterdam: Elsevier Science Bv, v. 726, n. 4-5, p. 587-609, 2013. 0370-2693 http://hdl.handle.net/11449/111325 10.1016/j.physletb.2013.09.057 WOS:000327907000005 WOS000327907000005.pdf |
Idioma(s) |
eng |
Publicador |
Elsevier B.V. |
Relação |
Physics Letters B |
Direitos |
openAccess |
Palavras-Chave | #CMS #Physics #Higgs |
Tipo |
info:eu-repo/semantics/article |