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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.
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http://hal.in2p3.fr/in2p3-00782450
Contributor : Sophie Heurteau <>
Submitted on : Tuesday, January 29, 2013 - 5:16:43 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:32 PM

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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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