R-Parity Violation and CP-Violating and CP-Conserving Spin Asymmetries in scr(l){sup +}scr(l){sup {minus}} {r_arrow} {tilde {nu}} {r_arrow} {tau}{sup +}{tau}{sup {minus}} : Probing Sneutrino Mixing at scr(l){sup +}scr(l){sup {minus}} Colliders
Journal Article
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· Physical Review Letters
- Physics Department, University of California, Riverside, California 92521 (United States)
- Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
We consider the sneutrino resonance reaction {ell}{sup +}{ell}{sup {minus}}{r_arrow}{tilde {nu}} {r_arrow}{tau}{sup +}{tau}{sup {minus}} in the minimal supersymmetric standard model (MSSM) without R parity. We introduce CP-violating and CP-conserving {tau}-spin asymmetries which are generated at {ital tree level } if there is {tilde {nu}}-{anti {tilde {nu}}} mixing and are forbidden in the standard model. At the CERN e{sup +}e{sup {minus}} collider LEP2, these asymmetries may reach {approximately}75{percent} around resonance for sneutrino mass splitting of {Delta}m{approximately}{Gamma}{sub {tilde {nu}}{sub {mu}}} and {approximately}10{percent} for splitting as low as {Delta}m{approximately}0.1{Gamma}{sub {tilde {nu}}{sub {mu}}} . They may be easily detectable if the beam energy is within {approximately}10 GeV around the {tilde {nu}}{sub {mu}} mass and may therefore serve as powerful probes of sneutrino mixing. Future colliders are also discussed. {copyright} {ital 1998} {ital The American Physical Society}
- Research Organization:
- Brookhaven National Laboratory
- DOE Contract Number:
- AC02-76CH00016; FG03-94ER40837
- OSTI ID:
- 664861
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 21 Vol. 80; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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