Is there any puzzle of new physics in B → Kπ decays?

C. S. Kim, Sechul Oh, Yeo Woong Yoon

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4 Citations (Scopus)


Due to re-parametrization invariance of decay amplitudes, any single new physics (NP) amplitude arising through either the electro-weak penguin (EWP) or the color-suppressed tree amplitude can be embedded simultaneously into both the color-suppressed tree and the EWP contribution in B → Kπ decays. We present a systematic method to extract each standard model (SM)-like hadronic parameter as well as new physics parameters in analytic way, so that one can pinpoint them once experimental data are given. Using the currently available experimental data for B → Kπ modes, we find two possible analytic results: one showing the large SM-like color-suppressed tree contribution and the other showing the large SM-like EWP contribution. The magnitude of the NP amplitude and its weak phase are quite large. For instance, we find |P NP/P′| = 0.39 ± 0.13, φNP = 92° ± 15° and δNP 7° ± 26°, which are the ratio of the NP-to-SM contribution, the weak and the strong phase of the NP amplitude, respectively. We also investigate the dependence of the NP contribution on the weak phase γ and the mixing induced CP asymmetry of B0 → KSπ0, respectively

Original languageEnglish
Pages (from-to)3296-3299
Number of pages4
JournalInternational Journal of Modern Physics A
Issue number21
Publication statusPublished - 2008 Aug 20

Bibliographical note

Funding Information:
The work of C.S.K. was supported in part by CHEP-SRC and in part by the KRF Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030. The work of S.O. was supported by the Second Stage of Brain Korea 21 Project. The work of Y.W.Y. was supported by the KRF Grant funded by the Korean Government(MOEHRD) No. KRF-2005-070-C00030.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics


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