Affordable Access

deepdyve-link
Publisher Website

Probing new physics in electroweak penguins through B_d and B_s decays

Authors
  • Hofer, Lars
  • Scherer, Dominik
  • Vernazza, Leonardo
Type
Preprint
Publication Date
Jun 12, 2011
Submission Date
Apr 28, 2011
Identifiers
DOI: 10.1088/1742-6596/335/1/012039
Source
arXiv
License
Yellow
External links

Abstract

An enhanced electroweak penguin amplitude due to the presence of unknown new physics can explain the discrepancies found between theory and experiment in the B -> pi K decays, in particular in A_CP(B^- -> pi^0 K^-) - A_CP(\bar{B}^0 -> pi^+ K^-), but the current precision of the theoretical and experimental results does not allow to draw a firm conclusion. We argue that the \bar{B}_s -> phi rho^0 and \bar{B}_s -> phi pi^0 decays offer an additional tool to investigate this possibility. These purely isospin-violating decays are dominated by electroweak penguins and we show that in presence of a new physics contribution their branching ratio can be enhanced by about an order of magnitude, without violating any constraints from other hadronic B decays. This makes them very interesting modes for LHCb and future B factories. In arXiv:1011.6319 we have performed both a model-independent analysis and a study within realistic New Physics models such as a modified-Z^0-penguin scenario, a model with an additional Z' boson and the MSSM. In this article we summarise the most important results of our study.

Report this publication

Statistics

Seen <100 times