U-Spin Symmetry in Charmless B Decays

Details U-Spin Symmetry in Charmless B Decays U-Spin Symmetry in Charmless B Decays

2000-08-28

arxiv.org/abs/hep-ph/0008292v4

Phys.Lett. B492 (2000) 297-302

Physics

High Energy Physics

High Energy Physics - Phenomenology

A few typos corrected, to appear in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(00)01119-9

We prove a general theorem about equal CP rate differences within pairs of U-spin related charmless $B$ and $B_s$ decays. Large deviations from equalities would be evidence for new physics. Six pairs of decays into two pseudoscalar mesons are identified where such relations hold. Ratios of corresponding rate differences and certain ratios of rates measure U-spin breaking. These processes provide useful information on the weak phase $\gamma={\rm Arg} V^*_{ub}$. Applications of U-spin symmetry to other decays are discussed.

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