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On theories of enhanced CP violation in B_(s,d) meson mixing

Trott, Michael and Wise, Mark B. (2010) On theories of enhanced CP violation in B_(s,d) meson mixing. Journal of High Energy Physics, 2010 (11). Art. No. 157. ISSN 1126-6708. doi:10.1007/JHEP11(2010)157.

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The DØ collaboration has measured a deviation from the standard model (SM) prediction in the like sign dimuon asymmetry in semileptonic b decay with a significance of 3.2 σ. We discuss how minimal flavour violating (MFV) models with multiple scalar representations can lead to this deviation through tree level exchanges of new MFV scalars. We review how the two scalar doublet model can accommodate this result and discuss some of its phenomenology. Limits on electric dipole moments suggest that in this model the coupling of the charged scalar to the right handed u-type quarks is suppressed while its coupling to the d-type right handed quarks must be enhanced. We construct an extension of the MFV two scalar doublet model where this occurs naturally.

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Additional Information:© 2010 SISSA. Received: September 29, 2010; Accepted: November 22, 2010; Published: November 30, 2010. We thank Z. Ligeti for comments on the manuscript. This work was partially supported by funds from the Natural Sciences and Engineering Research Council (NSERC) of Canada. Research at the Perimeter Institute is supported by the Government of Canada through Industry Canada and by the Province of Ontario through the Ministry of Research & Innovation. MBW is greatful to Perimter Institute for their hospitality while this work was done. The work of M.B.W. was supported in part by the U.S. Department of Energy under contract No. DE-FG02-92ER40701.
Group:Caltech Theory
Funding AgencyGrant Number
Natural Sciences and Engineering Research Council (NSERC)UNSPECIFIED
Industry CanadaUNSPECIFIED
Ontario Ministry of Research and InnovationUNSPECIFIED
Department of Energy (DOE)DE-FG02-92ER40701
Subject Keywords:Beyond Standard Model; CP violation; B-Physics; Higgs Physics
Issue or Number:11
Record Number:CaltechAUTHORS:20110105-105917873
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Official Citation:Trott, M., Wise, M.B. On theories of enhanced CP violation in B s,d meson mixing. J. High Energ. Phys. 2010, 157 (2010).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21603
Deposited By: Tony Diaz
Deposited On:05 Jan 2011 20:14
Last Modified:09 Nov 2021 15:58

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