Implications of the Dimuon CP Asymmetry in B{sub d,s} Decays

Journal Article · Fri Sep 24 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.131601· OSTI ID:21466974

Ligeti, Zoltan ^[1]; Papucci, Michele ^[2]; Perez, Gilad ^[3]; Zupan, Jure ^[4]

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1. Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)
2. Institute for Advanced Study, Princeton, New Jersey 08540 (United States)
3. Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100 (Israel)
4. Faculty of Mathematics and Physics, University of Ljubljana Jadranska 19, 1000 Ljubljana (Slovenia)

The D0 Collaboration reported a 3.2{sigma} deviation from the standard model (SM) prediction in the like-sign dimuon asymmetry. Assuming that new physics contributes only to B{sub d,s} mixing, we show that the data can be analyzed without using the theoretical calculation of {Delta}{Gamma}{sub s}, allowing for robust interpretations. We find that this framework gives a good fit to all measurements, including the recent CDF Collaboration S{sub {psi}{phi}} result. The data allow universal new physics with similar contributions relative to the SM in the B{sub d} and B{sub s} systems, but favors a larger deviation in B{sub s} than in B{sub d} mixing. The general minimal flavor violation framework with flavor diagonal CP violating phases can account for the former case and remarkably even for the latter case. This observation makes it simpler to speculate about which extensions with general flavor structure may also fit the data.

• OSTI ID: 21466974
• Journal Information: Physical Review Letters, Vol. 105, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.105.131601; (c) 2010 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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ASYMMETRY
B MESONS
B S MESONS
CP INVARIANCE
FERMILAB COLLIDER DETECTOR
FLAVOR MODEL
MULTIPARTICLE SPECTROMETERS
MUONS
PARTICLE DECAY
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DECAY
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FIELD THEORIES
GRAND UNIFIED THEORY
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MESONS
PARTICLE MODELS
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
QUARK MODEL
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UNIFIED GAUGE MODELS