2008/12/05 by Ekaterina Christova, Christova, Ekaterina, H. Eberl +4
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.0812.1129
Contributed talk, given at the workshop "Prospects for Charged Higgs Discovery at Colliders", September 16-19 2008, Uppsala, Sweden, 6 pages, 5 figures. To appear in the proceedings of the workshop, sign corrected in the box graph contribution
arxiv created 2008/12/19 · arxiv updated 2009/12/01
We study effects of CP violation in an associated production of a charged Higgs boson and a top quark at the LHC: pp → tH^± +X. We calculate the CP violating asymmetry between the total cross section for H+ and H- production at next-to-leading order in the MSSM, and perform a detailed numerical analysis. In the production only the asymmetry is of the order of 20%. The asymmetry in the production and any subsequent decay of an on-shell charged Higgs boson is to a good approximation the sum of the asymmetry in the production and the asymmetry in the decay. We consider subsequent decays of H^± to tb, νττ^± and Wh0. In the case of subsequent H^± → tb decay, the W^± - H^± self energy contributions from the production and the decay cancel. However, the remaining effect, mainly due to CP violating box graphs with gluino can go up to ∼ 13%.