Lepton polarization asymmetries for $B \to K^* \ell^+ \ell^-$: A Model Independent approach

Details Lepton polarization asymmetries for $B \to K^* \ell^+ \ell^-$: A Model Independent approach Lepton polarization asymmetries for $B \to K^* \ell^+ \ell^-$: A Model Independent approach

2004-08-16

arxiv.org/abs/hep-ph/0408164v2

JHEP 0502:005,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

version accepted in JHEP, formating changed to JHEP style, LaTeX file 23 pages including 15 eps figures

Scientific paper

10.1088/1126-6708/2005/02/005

In this work we shall derive expressions for the single and double lepton polarization asymmetries for the exclusive decay $B \to K^* \ell^+ \ell^-$, using the most general model independent effective Hamiltonian. We have conducted this study with this particular channel as it has the highest branching ratio among the various purely leptonic and semi-leptonic decay modes, making this mode particularly useful for studying physics beyond the SM. We have also analyzed the effects on these polarization asymmetries, and hence the physics underlying it, when complex phases are included in some of the Wilson coefficients.

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