Solution to the B -> pi K Puzzle in a Flavor-Changing Z' Model

Details Solution to the B -> pi K Puzzle in a Flavor-Changing Z' Model Solution to the B -> pi K Puzzle in a Flavor-Changing Z' Model

2004-06-10

arxiv.org/abs/hep-ph/0406126v2

Phys.Lett.B598:218-226,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 5 figures, to be submitted to Phys. Lett. B; references updated

Scientific paper

10.1016/j.physletb.2004.07.057

Recent experiments suggest that certain B -> pi K branching ratios are inconsistent with the standard model expectations. We show that a flavor-changing Z' provides a solution to the problem. Electroweak penguin amplitudes are enhanced by the Z' boson for select parameters. We discuss implications for the Z' mass and its couplings to the standard model fermions. We also show that the solution is consistent with constraints from the CP asymmetries of the B -> phi K_S decay.

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