APS » PROLA » Phys. Rev. Lett. » Volume 82 » Issue 11

Phys. Rev. Lett. 82, 2240 - 2243 (1999)

Electroweak Penguins, Final State Interaction Phases, and CP Violation in B → Kπ Decays

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N. G. Deshpande1, Xiao-Gang He2,3, Wei-Shu Hou2,4, and Sandip Pakvasa5
1Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403-5203
2Department of Physics, National Taiwan University, Taipei, Taiwan 10764, Republic of China
3School of Physics, University of Melbourne, Parkville, Victoria 3052, Australia
4Physics Department, Brookhaven National Laboratory, Upton, New York 11973
5Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 90822

Received 11 September 1998

The recently observed B-→K-π0, K̅ 0π- and B̅ 0→K-π+ decay modes appear to have nearly equal branching ratios. This suggests that tree and electroweak penguins play an important role, and inclusion of the latter improves agreement between factorization calculation and experimental data. The value of γ in the range of 90°–130° and 220°–260° is favored, while the B̅ 0→K̅ 0π0 rate is suppressed. Direct CP violation for B→Kπ modes can be large if final state interaction phases are large.


©1999 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v82/p2240
DOI: 10.1103/PhysRevLett.82.2240
PACS: 13.20.He, 11.30.Er, 12.38.Bx

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