Dispersive representation of the scalar and vector Kπ form factors for τ→Kπντ and Kℓ3 decays - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Conference Papers Year : 2011

Dispersive representation of the scalar and vector Kπ form factors for τ→Kπντ and Kℓ3 decays

Abstract

Recently, the τ→Kπντ decay spectrum has been measured by the Belle and BaBar collaborations. In this work, we present an analysis of such decays introducing a dispersive parametrization for the vector and scalar Kπ form factors. This allows for precise tests of the Standard Model. For instance, the determination of f+(0)|Vus| from these decays is discussed. A comparison and a combination of these results with the analyses of the Kℓ3 decays is also considered.

Dates and versions

in2p3-00782450 , version 1 (29-01-2013)

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Cite

V. Bernard, D.R. Boito, E. Passemar. Dispersive representation of the scalar and vector Kπ form factors for τ→Kπντ and Kℓ3 decays. The 11th International Workshop on Tau Lepton Physics, Sep 2010, Manchester, United Kingdom. pp.140-145, ⟨10.1016/j.nuclphysbps.2011.06.024⟩. ⟨in2p3-00782450⟩
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