Charm mixing as input for model-independent determinations of the CKM phase γ

The coherence factor and average strong phase difference of D0 and D¯0 decay amplitudes to the same final state play an important role in the precision determination of the CKM parameter γ using B±→DK± and related decay modes. So far, this important input from the charm sector could only be obtained...

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Bibliographic Details
Published in:Physics letters. B 2014, Vol.728, p.296-302
Main Authors: Harnew, Samuel, Rademacker, Jonas
Format: Article
Language:English
Subjects:
Coherence
Decay
Elementary particles
Factories
Industrial engineering
Mathematical models
Phase shift
Plants
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Summary:The coherence factor and average strong phase difference of D0 and D¯0 decay amplitudes to the same final state play an important role in the precision determination of the CKM parameter γ using B±→DK± and related decay modes. So far, this important input from the charm sector could only be obtained from measurements based on quantum-correlated DD¯ pairs produced at the charm threshold. We propose to constrain these parameters using charm mixing, using the large charm samples available at the B factories and LHCb. We demonstrate for the example of D→K+π−π+π− that a substantial improvement in the precision of the coherence factor and average strong phase difference can be obtained with this method, using existing data.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2013.11.065