CP violation in semileptonic tau lepton decays
Journal Article
·
· Physical Review. D, Particles Fields
- Instituto de Fisica, Universidad de Guanajuato, Loma del Bosque 103, Lomas del Campestre, 37150 Leon, Guanajuato (Mexico)
The leading order contribution to the direct CP asymmetry in {tau}{sup {+-}}{yields}K{sup {+-}}{pi}{sup 0}{nu}{sub {tau}} decay rates is evaluated within the standard model. The weak phase required for CP violation is introduced through an interesting mechanism involving second order weak interactions, which is also responsible for tiny violations of the {delta}S={delta}Q rule in K{sub l3} decays. The calculated CP asymmetry turns out to be of order 10{sup -12}, leaving a large window for studying effects of nonstandard sources of CP violation in this observable.
- OSTI ID:
- 20711199
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 72, Issue 3; Other Information: DOI: 10.1103/PhysRevD.72.033009; (c) 2005 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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