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

Journal Article · Fri Sep 24 04:00:00 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, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 105; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B MESONS
B S MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
COMPOSITE MODELS
CP INVARIANCE
DECAY
ELEMENTARY PARTICLES
FERMILAB COLLIDER DETECTOR
FERMIONS
FIELD THEORIES
FLAVOR MODEL
GRAND UNIFIED THEORY
HADRONS
INVARIANCE PRINCIPLES
LEPTONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESONS
MULTIPARTICLE SPECTROMETERS
MUONS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE MODELS
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
QUARK MODEL
RADIATION DETECTORS
SPECTROMETERS
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
UNIFIED GAUGE MODELS