Solution to the B → πK puzzle in a flavor-changing Z′ model

Vernon Barger, Cheng Wei Chiang, Paul Langacker, Hye Sung Lee

Research output: Contribution to journalArticlepeer-review

151 Scopus citations


Recent experiments suggest that certain B→πK 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→φKS decay.

Original languageEnglish (US)
Pages (from-to)218-226
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - Sep 30 2004

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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