Tau longitudinal polarization in B -> D tau nu and its role in the search for charged Higgs boson

Details Tau longitudinal polarization in B -> D tau nu and its role in the search for charged Higgs boson Tau longitudinal polarization in B -> D tau nu and its role in the search for charged Higgs boson

2010-05-24

arxiv.org/abs/1005.4306v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 3 figures. Tau -> l nu nu is included in Sec. II. Accordingly the title is changed. References are added

Scientific paper

We study the longitudinal polarization of the tau lepton in B -> D tau nu decay. After discussing possible sensitivities of tau decay modes to the tau polarization, we examine the effect of charged Higgs boson on the tau polarization in B -> D tau nu. We find a relation between the decay rate and the tau polarization, and clarify the role of the tau polarization measurement in the search for the charged Higgs boson.

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