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Optimizing the basis of B → K * ℓ + ℓ − observables in the full kinematic range

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  • Published: 27 May 2013
  • Volume 2013, article number 137, (2013)
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Optimizing the basis of B → K * ℓ + ℓ − observables in the full kinematic range
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  • Sébastien Descotes-Genon1,
  • Tobias Hurth2,
  • Joaquim Matias3 &
  • …
  • Javier Virto3 

  • 1111 Accesses

  • 248 Citations

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Abstract

We discuss the observables for the B → K *(→ Kπ)ℓ + ℓ − decay, focusing on both CP-averaged and CP-violating observables at large and low hadronic recoil with special emphasis on their low sensitivity to form-factor uncertainties. We identify an optimal basis of observables that balances theoretical and experimental advantages, which will guide the New Physics searches in the short term. We discuss some advantages of the observables in the basis, and in particular their improved sensitivity to New Physics compared to other observables. We present predictions within the Standard Model for the observables of interest, integrated over the appropriate bins including lepton mass corrections. Finally, we present bounds on the S-wave contribution to the distribution coming from the \( B\to K_0^{*}{\ell^{+}}{\ell^{-}} \) decay, which will help to establish the systematic error associated to this pollution.

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Authors and Affiliations

  1. Laboratoire de Physique Théorique, CNRS/Univ. Paris-Sud 11 (UMR 8627), 91405, Orsay Cedex, France

    Sébastien Descotes-Genon

  2. PRISMA Cluster of Excellence & Institute for Physics (THEP), Johannes Gutenberg University, D-55099, Mainz, Germany

    Tobias Hurth

  3. Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Catalonia, Spain

    Joaquim Matias & Javier Virto

Authors
  1. Sébastien Descotes-Genon
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  2. Tobias Hurth
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  3. Joaquim Matias
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  4. Javier Virto
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Corresponding author

Correspondence to Javier Virto.

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ArXiv ePrint: 1303.5794

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Descotes-Genon, S., Hurth, T., Matias, J. et al. Optimizing the basis of B → K * ℓ + ℓ − observables in the full kinematic range. J. High Energ. Phys. 2013, 137 (2013). https://doi.org/10.1007/JHEP05(2013)137

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  • Received: 04 April 2013

  • Accepted: 13 May 2013

  • Published: 27 May 2013

  • DOI: https://doi.org/10.1007/JHEP05(2013)137

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Keywords

  • Rare Decays
  • Beyond Standard Model
  • B-Physics
  • Standard Model
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