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 language||English (US)|
|Number of pages||9|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Sep 30 2004|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics