Supersymmetric prediction for the muon transverse polarization in the K{sup +}{r_arrow}{pi}{sup 0}{mu}{sup +}{nu}{sub {mu}} decay
- Istituto Nazionale di Fisica Nucleare, Sezione di Trieste (Italy)
The muon transverse polarization in the K{sup +}{r_arrow}{pi}{sup 0}{mu}{sup +}{nu}{sub {mu}} decay will be measured at the 10{sup {minus}4} level in forthcoming experiments. We compare the phenomenological perspectives with the theoretical predictions in supersymmetric extensions of the standard model. In the minimal extension, CP-violating phases lead to a nonzero transverse polarization, that, however, is too small to account for a positive experimental signal. The problems that one encounters when departing from minimal assumptions are discussed. An observable effect is possible if the hypothesis of R-parity conservation is relaxed, but only at the price of assuming a very special pattern for the R-parity-breaking couplings. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 562413
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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