CP asymmetries in the supersymmetric trilepton signal at the LHC

Details CP asymmetries in the supersymmetric trilepton signal at the LHC CP asymmetries in the supersymmetric trilepton signal at the LHC

2011-10-27

arxiv.org/abs/1110.6131v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

39 pages, 8 figures, version to appear in EPJC, discussion(s) added, typo in (D.79), (D.118) corrected, new Fig. 7; The Europe

Scientific paper

10.1140/epjc/s10052-012-1887-3

In the CP-violating Minimal Supersymmetric Standard Model, we study the production of a neutralino-chargino pair at the LHC. For their decays into three leptons, we analyze CP asymmetries which are sensitive to the CP phases of the neutralino and chargino sector. We present analytical formulas for the entire production and decay process, and identify the CP-violating contributions in the spin correlation terms. This allows us to define the optimal CP asymmetries. We present a detailed numerical analysis of the cross sections, branching ratios, and the CP observables. For light neutralinos, charginos, and squarks, the asymmetries can reach several 10%. We estimate the discovery potential for the LHC to observe CP violation in the trilepton channel.

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