Direct CP violation of B{yields}l{nu} in unparticle physics
- Department of Physics, Henan Normal University, Xinxiang, Henan 453007 (China)
- School of Physics, Korea Institute for Advanced Study, 207-43, Cheongryangri 2-dong, Dongdaemun-gu, Seoul 130-722 (Korea, Republic of)
We have investigated the effects of unparticles in decays B{yields}l{nu}. It is found that the direct CP violation in the decays, which is zero in the standard model, can show up due to the CP conserving phase intrinsic in unparticle physics. For l={tau}, the direct CP asymmetry can reach 30% for the scalar unparticle contribution, and 100% for the longitudinal vector unparticle contribution under the constraints of Br(B{yields}{tau}{nu}) and {nu}e elastic scattering. If both unparticle-lepton coupling universality and unparticle-quark coupling universality are assumed the constraint from Br({pi}{yields}{mu}{nu}) leads that the direct CP violation in B{yields}l{nu} can only reach at most 8% and 1% for scalar and vector unparticle contributions, respectively, if d{sub U}<2. If the direct CP violation is observed in the future it would give strong evidence for the existence of unparticle stuff.
- OSTI ID:
- 21249970
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 7; Other Information: DOI: 10.1103/PhysRevD.77.075014; (c) 2008 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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