Measurement of masses in the tt̄ system by kinematic endpoints in pp collisions at √s = 7 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
---|---|
Data(s) |
27/05/2014
27/05/2014
01/07/2013
|
Resumo |
A simultaneous measurement of the top-quark, W-boson, and neutrino masses is reported for tt̄ events selected in the dilepton final state from a data sample corresponding to an integrated luminosity of 5.0 fb-1 collected by the CMS experiment in pp collisions at √s = 7 TeV. The analysis is based on endpoint determinations in kinematic distributions. When the neutrino and W-boson masses are constrained to their world-average values, a top-quark mass value of Mt = 173.9 ± 0.9 (stat)+1.7 -2.1(syst.) GeV is obtained. When such constraints are not used, the three particle masses are obtained in a simultaneous fit. In this unconstrained mode the study serves as a test of mass determination methods that may be used in beyond standard model physics scenarios where several masses in a decay chain may be unknown and undetected particles lead to underconstrained kinematics. © 2013 CERN for the benefit of the CMS collaboration. |
Formato |
1-28 |
Identificador |
http://dx.doi.org/10.1140/epjc/s10052-013-2494-7 European Physical Journal C, v. 73, n. 7, p. 1-28, 2013. 1434-6044 1434-6052 http://hdl.handle.net/11449/75825 10.1140/epjc/s10052-013-2494-7 WOS:000322575300019 2-s2.0-84881612066 2-s2.0-84881612066.pdf |
Idioma(s) |
eng |
Relação |
European Physical Journal C |
Direitos |
openAccess |
Tipo |
info:eu-repo/semantics/article |