Sneutrino Mixing Phenomena

Sneutrino Mixing Phenomena

In any model with nonzero Majorana neutrino masses, the sneutrino and antisneutrino of the supersymmetric extended theory mix. We outline the conditions under which sneutrino-antisneutrino mixing is experimentally observable. The mass-splitting of the sneutrino mass eigenstates and sneutrino oscillation phenomena are considered.

R–parity violation, sneutrino mixing phenomena and CP-violation in p¯p → ˜ν → ℓ + ℓ − + X

The sneutrino resonance reactions p¯ p → ˜ ν → ℓ + ℓ − +X, for ℓ = e, µ, τ , in the MSSM without R–parity are considered. We perform a cross–section analysis and show that present limits on some products of R / P couplings in the sneutrino sector can be significantly improved in future upgraded Tevatron runs. Furthermore, we introduce CP–violating and CP–conserving τ –spin asymmetries which are...

Sneutrino-antisneutrino mixing at future colliders

Sneutrino-antisneutrino mixing occurs in a supersymmetric model where neutrinos have nonzero Majorana masses. This can lead to the sneutrino decaying into a final state with a “wrongsign charged lepton”. In an e−γ collider, the signal of the associated production of an electronsneutrino and the lighter chargino and their subsequent decays can be e−γ → eτ̃ 1 τ̃ − 1 + pT / where the τ̃1s are long-li...

Neutrino masses and sneutrino mixing in R-parity violating supersymmetry∗†

R-parity-violating supersymmetry with a conserved baryon number B provides a framework for particle physics with lepton number (L) violating interactions. Two important probes of the L-violating physics are neutrino masses and sneutrino-antisneutrino mass-splittings. We evaluate these quantities in the context of the most general CP-conserving, R-parity-violating B-conserving extension of the m...

980 ) mixing in polarization phenomena