CP violation in hadronic {tau} decays
- Dept of Physics and Astronomy, 108 Lewis Hall, University of Mississippi, Oxford, Mississippi 38677-1848 (United States)
- Physics Department, Taylor University, 236 West Reade Avenue, Upland, Indiana, 46989 (United States)
- Physique des Particules, Universite de Montreal, C.P. 6128, succursale centre-ville, Montreal, QC, H3C 3J7 (Canada)
- Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON, M5S 1A7 (Canada)
We reexamine CP violation in the {delta}S=0 decays {tau}{yields}N{pi}{nu}{sub {tau}} (N=2,3,4). We assume that the new physics (NP) is a charged Higgs boson. We show that there is no NP contribution to {tau}{yields}{pi}{pi}{nu}{sub {tau}}, which means that no CP violation is expected in this decay. On the other hand, NP can contribute to {tau}{yields}N{pi}{nu}{sub {tau}} (N=3,4). These are dominated by the intermediate resonant decays {tau}{yields}{omega}{pi}{nu}{sub {tau}}, {tau}{yields}{rho}{pi}{nu}{sub {tau}}, and {tau}{yields}a{sub 1}{pi}{nu}{sub {tau}}. We show that the only sizeable CP-violating effects which are possible are in {tau}{yields}a{sub 1}{pi}{nu}{sub {tau}}{yields}4{pi}{nu}{sub {tau}} (polarization-dependent rate asymmetry) and {tau}{yields}{omega}{pi}{nu}{sub {tau}} (triple-product asymmetry)
- OSTI ID:
- 21020267
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 75, Issue 7; Other Information: DOI: 10.1103/PhysRevD.75.074007; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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