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Large strong phases and CP violation in the annihilation processes B̄0→K+K-, K*±K∓, K*+K*-

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Abstract

The strong phases and CP violation in the rare B̄0→K+K-, K*±K∓, K*+K*- decays are investigated. As these decays proceed only via annihilation type diagrams in the standard model (SM), a dynamical gluon mass is introduced to avoid the infrared divergence in the soft endpoint regions. The Cutkosky rule is adopted to deal with a physical-region singularity of the on-mass-shell quark propagators, which leads to a big imaginary part and hence a large strong phase. As a consequence, large CP asymmetries are predicted in those decay modes due to a big interference between the annihilation amplitudes from penguin and tree operators, which may be tested in future more precise experiments.

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Authors and Affiliations

  1. Institute of Theoretical Physics, Chinese Academy of Science, Beijing, 100080, P.R. China

    F. Su, Y.-L. Wu & C. Zhuang

  2. Graduate School, Chinese Academy of Science, Beijing, 100039, P.R. China

    F. Su & C. Zhuang

  3. Department of Physics, Henan Normal University, Xinxiang, Henan, 453007, P.R. China

    Y.-D. Yang

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  1. F. Su
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  2. Y.-L. Wu
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  3. Y.-D. Yang
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  4. C. Zhuang
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Correspondence to Y.-L. Wu.

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PACS

13.25.Hw; 11.30.Er; 12.38.Bx

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Su, F., Wu, YL., Yang, YD. et al. Large strong phases and CP violation in the annihilation processes B̄0→K+K-, K*±K∓, K*+K*- . Eur. Phys. J. C 48, 401–411 (2006). https://doi.org/10.1140/epjc/s10052-006-0029-1

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