Complete anatomy of B̄ <inf>d</inf> → K̄ <sup>*0</sup>(→ Kφ)l+l-and its angular distribution

J. Matias, F. Mescia, M. Ramon, J. Virto

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96 Citations (Scopus)

Abstract

We present a complete and optimal set of observables for the exclusive 4-body B̄ meson decay B̄ d → K̄ *0(→ Kφ)l +l - in the low dilepton mass region, that contains a maximal number of clean observables. This basis of observables is built in a systematic way. We show that all the previously defined observables and any observable that one can construct, can be expressed as a function of this basis. This set of observables contains all the information that can be extracted from the angular distribution in the cleanest possible way. We provide explicit expressions for the full and the uniangular distributions in terms of this basis. The conclusions presented here can be easily extended to the large-q 2 region. We study the sensitivity of the observables to right-handed currents and scalars. Finally, we present for the first time all the symmetries of the full distribution including massive terms and scalar contributions. © SISSA 2012.
Original languageEnglish
Article number104
JournalJournal of High Energy Physics
Volume2012
Issue number4
DOIs
Publication statusPublished - 10 May 2012

Keywords

  • B-physics
  • Beyond standard model
  • Rare decays

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