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CP violation and the absence of second class currents in charmless B decays

  • S. Laplace
  • V. Shelkov
Theoretical physics

Abstract.

The absence of second class currents together with the assumption of the factorization for non-leptonic B decays provide new constraints on CP observables in the decay \(B \rightarrow a_0(980)(\rightarrow \eta\pi)\pi\). The kinematics of this decay does not allow for interference between the oppositely charged resonances in the Dalitz plot as in \(B^0 \rightarrow \rho(770)\pi \). Nonetheless, under the assumption of factorization, the \(B \rightarrow a_0\pi\) two-body time-dependent isospin analysis leads to a more robust extraction of the angle \(\alpha\) than in the \(B \rightarrow \rho\pi\) isospin-pentagon analysis. The absence of second class currents might lead to enhanced direct CP violation and/or allows for a test of some assumptions made in the \(\alpha\) analysis in other decays like \(B \to a_0 \rho, B \rightarrow b_1(1235)\pi, B\to a_0 a_0\), \(B\to \eta(\eta')\pi\pi\) and \(B\to b_1 a_0\). The effects from non-factorizable contributions on the determination of \(\alpha\) are estimated by means of a numerical study.

Keywords

Dalitz Plot Class Current Robust Extraction Isospin Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2001

Authors and Affiliations

  • S. Laplace
    • 1
  • V. Shelkov
    • 2
  1. 1.Laboratoire de l'Accélérateur Linéaire, IN2P3-CNRS et Université Paris-Sud, BP 34, 91898 Orsay Cedex, FranceFR
  2. 2.Lawrence Berkeley National Laboratory, 1, Cyclotron Road, Berkeley, CA 94720, USAUS

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