Polarization States in B -> rho K* and New Physics

Details Polarization States in B -> rho K* and New Physics Polarization States in B -> rho K* and New Physics

2005-08-12

arxiv.org/abs/hep-ph/0508149v3

Phys.Rev. D72 (2005) 094008

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, latex, no figures. Minor changes to references and Table 1. Minor modification of terms; more complete description o

Scientific paper

10.1103/PhysRevD.72.094008

The standard-model explanations of the anomalously-large transverse polarization fraction fT in B -> phi K* can be tested by measuring the polarizations of the two decays B+ -> rho+ K*0 and B+ -> rho0 K*+. For the scenario in which the transverse polarizations of both B -> rho K* decays are predicted to be large, we derive a simple relation between the fT's of these decays. If this relation is not confirmed experimentally, this would yield an unambiguous signal for new physics. The new-physics operators which can account for the discrepancy in B -> pi K decays will also contribute to the polarization states of B -> rho K*. We compute these contributions and show that there are only two operators which can simultaneously account for the present B -> pi K and B -> rho K* data. If the new physics obeys an approximate U-spin symmetry, the B -> phi K* measurements can also be explained.

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