General minimal flavor violation
- Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221 (United States)
- Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100 (Israel)
- School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540 (United States)
- Theory Division, Department of Physics, CERN, CH-1211 Geneva 23 (Switzerland)
A model independent study of the minimal flavor violation (MFV) framework is presented, where the only sources of flavor breaking at low energy are the up and down Yukawa matrices. Two limits are identified for the Yukawa coupling expansion: linear MFV, where it is truncated at the leading terms, and nonlinear MFV, where such a truncation is not possible due to large third generation Yukawa couplings. These are then resummed to all orders using nonlinear {sigma}-model techniques familiar from models of collective breaking. Generically, flavor-diagonal CP violating (CPV) sources in the UV can induce O(1) CPV in processes involving third generation quarks. Because of a residual U(2) symmetry, the extra CPV in B{sub d}-B{sub d} mixing is bounded by CPV in B{sub s}-B{sub s} mixing. If operators with right-handed light quarks are subdominant, the extra CPV is equal in the two systems, and is negligible in processes involving only the first two generations. We find large enhancements in the up-type sector, both in CPV in D-D mixing and in top flavor violation.
- OSTI ID:
- 21325283
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 7; Other Information: DOI: 10.1103/PhysRevD.80.076002; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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