Implications of the LHCb evidence for charm CP violation

The LHCb collaboration recently announced preliminary evidence for CP violation in D meson decays. We discuss this result in the context of the standard model (SM), as well as its extensions. In the absence of reliable methods to evaluate the hadronic matrix elements involved, we can only estimate q...

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Bibliographic Details
Published in:Physics letters. B 2012-05, Vol.711 (1), p.46-51
Main Authors: Isidori, Gino, Kamenik, Jernej F., Ligeti, Zoltan, Perez, Gilad
Format: Article
Language:English
Subjects:
Decay
Elementary particles
Estimates
Exact sciences and technology
Lists
Mesons
Nuclear physics
Operators
Physics
The physics of elementary particles and fields
Trees
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Summary:The LHCb collaboration recently announced preliminary evidence for CP violation in D meson decays. We discuss this result in the context of the standard model (SM), as well as its extensions. In the absence of reliable methods to evaluate the hadronic matrix elements involved, we can only estimate qualitatively the magnitude of the non-SM tree level operators required to generate the observed central value. In the context of an effective theory, we list the operators that can give rise to the measured CP violation and investigate constraints on them from other processes.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2012.03.046