Exploring New Physics in the $B\to φK$ System

Details Exploring New Physics in the $B\to φK$ System Exploring New Physics in the $B\to φK$ System

2001-03-12

arxiv.org/abs/hep-ph/0103121v1

Phys.Lett.B511:240-250,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, LaTeX, 2 figures

Scientific paper

10.1016/S0370-2693(01)00648-7

Employing the SU(2) isospin symmetry of strong interactions and estimates borrowed from effective field theory, we explore the impact of new physics on the decays $B^\pm\to \phi K^\pm$ and $B_d\to \phi K_S$ in a model-independent manner. To this end, we introduce - in addition to the usual mixing-induced CP asymmetry in $B_d\to \phi K_S$ - a set of three observables, which may not only provide smoking-gun signals for new-physics contributions to different isospin channels, but also valuable insights into hadron dynamics. Imposing dynamical hierarchies of amplitudes, we discuss various patterns of these observables, including also scenarios with small and large rescattering processes. Whereas the $B\to\phi K$ system provides, in general, a powerful tool to search for indications of new physics, there is also an unfortunate case, where such effects cannot be distinguished from those of the Standard Model.

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