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CP violation and strong phases from penguins in B±→PP and B±→VP decays

  • Theoretical Physics
  • Published:
Zeitschrift für Physik C Particles and Fields

Abstract

We calculate direct CP-violating rate asymmetries in chargedB→PP andB→VP decays arising from the interference of amplitudes with different strong and CKM phases. The perturbative strong phases develop at order α s from absorptive parts of one-loop matrix elements of the next-to-leading logarithm corrected effective Hamiltonian. CPT constraints are maintained. Based on this model, we find that partial rate asymmetries between charge conjugateB ± decays can be as high as 20% for certain channels with branching ratios in the 10−6 range. Because the\(c\bar c\) threshold lies so close to the physical momentum scale, the asymmetries depend sensitively on the model assumptions used to evaluate the imaginary parts of the matrix elements, in particular, on the internal momentum transfer. The charge asymmetries of partial rates would provide unambiguous evidence for direct CP violation.

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Authors and Affiliations

  1. II. Institut für Theoretische Physik der Universität Hamburg, D-22761, Hamburg, Germany

    G. Kramer

  2. Department of Physics, Ohio State University, 43210, Columbus, USA

    W. F. Palmer

  3. Deutsches Elektronen Synchrotron DESY, D-22603, Hamburg, Germany

    H. Simma

Authors
  1. G. Kramer
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  2. W. F. Palmer
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  3. H. Simma
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Additional information

Supported in part by the US Department of Energy under contract DOE/ER/01545-605

Supported by Bundesministerium für Forschung und Technologie, 056HH93P(5), Bonn, Germany and EEC Program “Human Capital and Mobility” Network “Physics at High Energy Colliders” CHRX-CT93-0357 (DG 12 COMA)

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Kramer, G., Palmer, W.F. & Simma, H. CP violation and strong phases from penguins in B±→PP and B±→VP decays. Z. Phys. C - Particles and Fields 66, 429–437 (1995). https://doi.org/10.1007/BF01556369

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  • DOI: https://doi.org/10.1007/BF01556369

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