Wednesday, July 10, 2013

1307.2308 (Li Xiao-Peng et al.)

Single (anti-)top production in association with a lightest neutralino
at LHeC

Li Xiao-Peng, Guo Lei, Ma Wen-Gan, Zhang Ren-You, Han Liang, Song Mao
In this paper we examine thoroughly the single (anti-)top quark production associated with a lightest neutralino at the possible CERN Large Hadron Electron Collider (LHeC). We calculate the full next-to-leading (NLO) QCD corrections to the process including all the non-resonant diagrams and do not assume the production and decay factorization for the possible resonant scalar top (stop) quarks in the R-parity violating minimal supersymmetric standard model (MSSM) with 19 unrelated parameters. We investigate numerically the effects of the relevant supersymmetry (SUSY) parameters on the cross section, and present the transverse momentum distributions of final (anti-)top quark at both the leading-order (LO) and the QCD NLO. We find that the NLO QCD corrections enhance the LO cross sections in most chosen parameter space, and the NLO QCD impacts on the transverse momentum distributions of final (anti-)top quark might be resolvable in some cases. We conclude that even if with recently known experimental constraints the SUSY parameters, the production rate could still achieve notable value in the admissible parameter space.
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