Is there a paradox in CP asymmetries of {tau}{sup {+-}}{yields}K{sub L,S}{pi}{sup {+-}}{nu} decays?
- Instituto de Fisica de la Universidad de Guanajuato, C.P. 37150, Leon, Guanajuato (Mexico)
Based on the description of unstable K{sub L,S} particles in quantum field theory (QFT), we compute the time-dependent probabilities for transitions between asymptotic states in {tau}{sup {+-}}{yields}[{pi}{sup +}{pi}{sup -}]{sub K}{pi}{sup {+-}}{nu} decays, where the pair [{pi}{sup +}{pi}{sup -}]{sub K} is the product of (intermediate state) neutral kaon decays. Then we propose a definition of {tau} decays into K{sub L} and K{sub S} states, which reflects into the cancellation between their CP rate asymmetries, thus solving in a natural way the paradox pointed out in [I. I. Bigi and A. I. Sanda, Phys. Lett. B 625, 47 (2005).]. Since our definition of K{sub L,S} final states in {tau} decays is motivated on experimental grounds, our predictions for the integrated CP rate asymmetries can be tested in a dedicated experiment.
- OSTI ID:
- 21020317
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 75, Issue 7; Other Information: DOI: 10.1103/PhysRevD.75.076001; (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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