Edge charge asymmetry in top pair production at the LHC

Journal Article · Tue Mar 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.057503· OSTI ID:21537477

Bo, Xiao; Youkai, Wang; Zhongqiu, Zhou ^[1]; Shouhua, Zhu ^[1]

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1. Institute of Theoretical Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)

In this brief report, we propose a new definition of charge asymmetry in top pair production at the LHC, namely, the edge charge asymmetry (ECA). ECA utilizes the information of drifting direction only for single top (or antitop) with hadronic decay. Therefore, ECA can be free from the uncertainty arising from the missing neutrino in the tt event reconstruction. Moreover, rapidity Y of top (or antitop) is required to be greater than a critical value Y{sub C} in order to suppress the symmetric tt events mainly due to the gluon-gluon fusion process. In this paper, ECA is calculated up to next-to-leading order QCD in the standard model and the choice of the optimal Y{sub C} is investigated.

• OSTI ID: 21537477
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevD.83.057503; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
CERN LHC
COMPUTERIZED SIMULATION
GLUON-GLUON INTERACTIONS
HADRONIC PARTICLE DECAY
NEUTRINOS
PAIR PRODUCTION
QUANTUM CHROMODYNAMICS
STANDARD MODEL
SYMMETRY
ACCELERATORS
CYCLIC ACCELERATORS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
QUANTUM FIELD THEORY
SIMULATION
STORAGE RINGS
SYNCHROTRONS
UNIFIED GAUGE MODELS