CP Violation in Pseudo-Dirac Fermion Oscillations
arXiv:1407.8193 · doi:10.1103/PhysRevD.90.076005
Abstract
Supersymmetric theories with a symmetry have Dirac gauginos, solve the supersymmetric flavor and CP problems, and have distinctive collider signatures. However when supergravity is included, the must be broken, adding small Majorana mass terms which split the mass of the two components of the Dirac gaugino and lead to oscillations between charge eigenstates. We present a general study of fermion-antifermion oscillations in this system, including the effects of decays and CP violation. We consider the effects of such oscillations in the case where the two charge eigenstates can decay into the same final state, and show that CP violation is allowed. In the case of decays into final states containing leptons such CP violation can be observed as a same sign dilepton asymmetry.
arXiv comment12 pages, 4 figures, v2: references added, typos corrected
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