Implications of the RK and RK* anomalies

  • We discuss the implications of the recently reported RK and RK* anomalies, the lepton flavor non-universality in the B→ Kl+l- and B→ K*l+l- decay channels. Using two sets of hadronic inputs of form factors, we perform a fit of new physics to the RK and RK* data, and significant new physics contributions are found. We suggest the study of lepton flavor universality in a number of related rare B, Bs,Bc and Λb decay channels, and in particular we give predictions for the μ-to-e ratios of decay widths with different polarizations of the final state particles, and of the b→ dl+l- processes, which are presumably more sensitive to the structure of the underlying new physics. With the new physics contributions embedded in the Wilson coefficients, we present theoretical predictions for lepton flavor non-universality in these processes.
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Wei Wang and Shuai Zhao. Implications of the RK and RK* anomalies[J]. Chinese Physics C, 2018, 42(1): 013105. doi: 10.1088/1674-1137/42/1/013105
Wei Wang and Shuai Zhao. Implications of the RK and RK* anomalies[J]. Chinese Physics C, 2018, 42(1): 013105.  doi: 10.1088/1674-1137/42/1/013105 shu
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Received: 2017-08-29
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    Supported by National Natural Science Foundation of China (11575110, 11655002, 11735010), Natural Science Foundation of Shanghai (15DZ2272100, 15ZR1423100), Young Thousand Talents Plan and Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education

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Implications of the RK and RK* anomalies

    Corresponding author: Shuai Zhao,
  • 1. INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao-Tong University, Shanghai 200240, China
Fund Project:  Supported by National Natural Science Foundation of China (11575110, 11655002, 11735010), Natural Science Foundation of Shanghai (15DZ2272100, 15ZR1423100), Young Thousand Talents Plan and Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education

Abstract: We discuss the implications of the recently reported RK and RK* anomalies, the lepton flavor non-universality in the B→ Kl+l- and B→ K*l+l- decay channels. Using two sets of hadronic inputs of form factors, we perform a fit of new physics to the RK and RK* data, and significant new physics contributions are found. We suggest the study of lepton flavor universality in a number of related rare B, Bs,Bc and Λb decay channels, and in particular we give predictions for the μ-to-e ratios of decay widths with different polarizations of the final state particles, and of the b→ dl+l- processes, which are presumably more sensitive to the structure of the underlying new physics. With the new physics contributions embedded in the Wilson coefficients, we present theoretical predictions for lepton flavor non-universality in these processes.

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