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How large can the SM contribution to CP violation in \( {D_0} - {\overline D_0} \) mixing be?

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Abstract

We reconsider the leading HQE contributions to the absorptive part of the mixing amplitude of neutral D mesons by taking also α s corrections and subleading 1/m c corrections into account. We show that these contributions to Γ12 do not vanish in the exact SU(3) F limit and they also can have a large phase. Moreover, we give an example of a new physics model that can enhance these leading HQE terms to Γ12, which are orders of magnitude lower than the current experimental expectation, by one to two orders of magnitude.

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Authors and Affiliations

  1. Institut für Theoretische Physik, Universität Regensburg, 93040, Regensburg, Germany

    M. Bobrowski, A. Lenz, J. Riedl & J. Rohrwild

  2. Institut für Physik, Technische Universität Dortmund, D-42211, Dortmund, Germany

    A. Lenz

  3. Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen University, D-52056, Aachen, Germany

    J. Rohrwild

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  1. M. Bobrowski
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Correspondence to J. Rohrwild.

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Bobrowski, M., Lenz, A., Riedl, J. et al. How large can the SM contribution to CP violation in \( {D_0} - {\overline D_0} \) mixing be?. J. High Energ. Phys. 2010, 9 (2010). https://doi.org/10.1007/JHEP03(2010)009

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