Supersymmetric QCD and CP-violation effects in ttZ{sup 0} production at the LHC

Journal Article · Thu Jul 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.015009· OSTI ID:21410065

Ning, Liu; Lei, Guo; Wengan, Ma; Renyou, Zhang; Liang, Han ^[1]

---

1. Department of Modern Physics, University of Science and Technology of China (USTC), Hefei, Anhui 230026 (China)

We investigate the NLO QCD and the CP-violation effects in ttZ{sup 0} production at the LHC in the minimal supersymmetric standard model (MSSM). Our calculation shows that the total NLO QCD correction in the framework of the CP-conserving MSSM significantly improves the scale uncertainty at the leading order, and the contribution from the pure supersymmetric QCD (pSQCD) correction can exceed -8% with the restrictions of 90 GeV<p{sub T}{sup t}<120 GeV and 120 GeV<p{sub T}{sup Z}<150 GeV, where p{sub T}{sup t} and p{sub T}{sup Z} are the transverse momenta of the top quark and Z{sup 0} gauge boson, respectively. Our numerical results demonstrate that the pure supersymmetric QCD correction generally suppresses the total standard model-like QCD correction in the CP-conserving MSSM, and tends to be a constant when either t-tilde{sub 1} or g-tilde is heavy enough. We find also that the CP-odd asymmetry A{sub {Phi}}can reach 2.17x10{sup -3}, if the CP-phase angle really exists in the coupling of gluino-stop-top.

• OSTI ID: 21410065
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 82; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ASYMMETRY
BOSONS
CERN LHC
COMPUTERIZED SIMULATION
CORRECTIONS
COUPLING
CP INVARIANCE
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
GEV RANGE
GEV RANGE 100-1000
GRAND UNIFIED THEORY
INVARIANCE PRINCIPLES
LINEAR MOMENTUM
MATHEMATICAL MODELS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
SIMULATION
STANDARD MODEL
STORAGE RINGS
SUPERSYMMETRY
SYMMETRY
SYNCHROTRONS
T QUARKS
TOP PARTICLES
TRANSVERSE MOMENTUM
UNIFIED GAUGE MODELS