Possible Implications of Small or Large CP Violation in Bd0 vs Bd0→J/ψKS Decays

XING Zhi-Zhong

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 2002, Vol. 26> Issue(3) : 197-200

Possible Implications of Small or Large CP Violation in Bd0 vs Bd0→J/ψKS Decays

XING Zhi-Zhong ^,

Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039,China

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Abstract：
We argue that a small or large CP-violating asymmetry AψKS in B0d vs B0d→J/ψKS decays,which seems to be favored by the recent BaBar or Belle data,might hint at the existence of new physics in B0d-B0d mixing. We present a model-independent framework to show how new physics modifies the standard-model CP-violating asymmetry A SM ψKS. We particularly emphasize that an experimental confirmation of AψKS≈A SM ψKS must not imply the absence of new physics in B0d-B0d mixing.

References

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BaBar Collahtion, B. Aubert et al. hep-ph101070132 Belle Collaboration, A. Abashian et a1. hep-ph/l01070613 CDF Collaboration, T. Affolder et al . Phys. Rev.,2000, D61: 0720054 Caravaglios F et al. hep-ph/00021715 DU D, Dunietz I, WU D D. Phys. Rev.,1986,D34: 34146 DU D, XING Z Z. Phys. Lett. 1993, B312: 199; 1995. B363: 3137 Particle Data Group, Groom D E et a1. Eur. Phys. J., 2000, C15: 18 See, e. g., Nir Y. SLAC-PUB-5874, 19929 Sends A I, XING Z Z. Phys. Rev., 1997, D56: 6866; XING Z Z. Eur. Phys. J., 1998. C4: 28310 Kagan A L. Neubert M. Phys. Lett. 2000, B492: 115; Silva J P, Wolfenstein L. Phys. Rev., 2001, D63: 056001 ; Eyal G, Nir Y,Perez G. JHEP, 2000, 0008: 028; Buras A J, Ruras R. Phys. Lett.,2001, B501: 223; Masiero A. Piai M, Viven O. Phys. Rev., 2001. D64: 055008; Fritzach H. XING Z Z. Phys. Lett., 2001, B506: 109; Fleischer R, Mannel T. Phys. Lett., 2001, 8506: 311

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XING Zhi-Zhong. Possible Implications of Small or Large CP Violation in Bd0 vs Bd0→J/ψKS Decays[J]. Chinese Physics C, 2002, 26(3): 197-200.

XING Zhi-Zhong. Possible Implications of Small or Large CP Violation in Bd0 vs Bd0→J/ψKS Decays[J]. Chinese Physics C, 2002, 26(3): 197-200. shu

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Received: 2001-10-18
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Possible Implications of Small or Large CP Violation in Bd0 vs Bd0→J/ψKS Decays

XING Zhi-Zhong ^,

Corresponding author: XING Zhi-Zhong,

Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039,China

Received Date: 2001-10-18
Accepted Date: 1900-01-01
Available Online: 2002-03-05

Abstract: We argue that a small or large CP-violating asymmetry AψKS in B0d vs B0d→J/ψKS decays,which seems to be favored by the recent BaBar or Belle data,might hint at the existence of new physics in B0d-B0d mixing. We present a model-independent framework to show how new physics modifies the standard-model CP-violating asymmetry A SM ψKS. We particularly emphasize that an experimental confirmation of AψKS≈A SM ψKS must not imply the absence of new physics in B0d-B0d mixing.