Measurement of masses in the toverline{t} system by kinematic endpoints in pp collisions at √{s}=7 TeV
Abstract
A simultaneous measurement of the top-quark, W-boson, and neutrino masses is reported for 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 . 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 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.
- Publication:
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European Physical Journal C
- Pub Date:
- July 2013
- DOI:
- 10.1140/epjc/s10052-013-2494-7
- Bibcode:
- 2013EPJC...73.2494C