CP Violation in Tau Slepton Pair Production at Muon Colliders

Details CP Violation in Tau Slepton Pair Production at Muon Colliders CP Violation in Tau Slepton Pair Production at Muon Colliders

2001-03-27

arxiv.org/abs/hep-ph/0103284v2

Phys.Rev. D64 (2001) 095009

Physics

High Energy Physics

High Energy Physics - Phenomenology

38 pages, 9 figures Including 7 eps ones. A figure to show the dependence on tan(beta) and the mass parameters of the sfermion

Scientific paper

10.1103/PhysRevD.64.095009

We discuss in detail signals for CP violation in the Higgs boson and tau-slepton sectors through the production processes $\mu^+\mu^- \to \tilde{\tau}_i^- \tilde{\tau}_j^+$, where $i,j=1,2$ label the two $\tau$ slepton mass eigenstates in the minimal supersymmetric standard model. We assume that the soft breaking parameters of third generation sfermions contain CP violating phases, which induce CP violation in the Higgs sector through quantum corrections. We classify all the observables for probing CP violation in the Higgs boson and $\tau$ slepton sectors. These observables depend on the initial muon beam polarization, where we include transverse polarization states. If the heavy Higgs bosons can decay into tau slepton pairs, a complete determination of the CP properties of the neutral Higgs boson and $\tau$--slepton systems is possible. The interference between the Higgs boson and gauge boson contributions could also provide a powerful method for probing CP violation, if transversely polarized muon beams are available. We show in detail how to directly measure CP violation in the tau slepton system, under the assumption that the neutral Higgs mixing angles are determined through the on--shell production of the neutral Higgs bosons.

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