General Analysis of U-Spin Breaking in B Decays

TL;DR

This paper provides a group theoretical analysis of U-spin symmetry breaking in B meson decays, simplifying the understanding of decay processes and their deviations from symmetry expectations.

Contribution

It introduces a manageable parameter framework for analyzing U-spin breaking effects in B decays based on group theory.

Findings

U-spin breaking can be systematically analyzed using group theory.

The approach simplifies the description of decay amplitudes involving U-spin symmetry.

Applications include detailed analysis of B -> J/psi K and B -> D K decays.

Abstract

We analyse the breaking of U-spin on a group theoretical basis. Due to the simple behaviour of the weak effective hamiltonian under U-spin and the unique structure of the breaking terms such a group theoretical analysis leads to a manageable number of parameters. Several applications are discussed, including the decays B -> J/psi K and B -> D K.