Less minimal flavour violation

A bstract We consider the approximate U(2) 3 flavour symmetry exhibited by the quark sector of the Standard Model and all its possible breaking terms appearing in the quark Yukawa couplings. Taking an Effective Field Theory point of view, we determine the current bounds on these parameters, assumed...

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Bibliographic Details
Published in:The journal of high energy physics 2012-10, Vol.2012 (10), Article 40
Main Authors: Barbieri, Riccardo, Buttazzo, Dario, Sala, Filippo, Straub, David M.
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Couplings
CP violation
Elementary Particles
Field theory
Flavor (particle physics)
High energy physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quarks
Relativity Theory
Standard model (particle physics)
String Theory
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Summary:A bstract We consider the approximate U(2) 3 flavour symmetry exhibited by the quark sector of the Standard Model and all its possible breaking terms appearing in the quark Yukawa couplings. Taking an Effective Field Theory point of view, we determine the current bounds on these parameters, assumed to control the breaking of flavour in a generic extension of the Standard Model at a reference scale Λ. In particular, a significant bound from ϵ ′/ ϵ is derived, which is relevant to Minimal Flavour Violation as well. In the up- quark sector, the recently observed CP violation in D → π + π − , K + K − decays might be accounted for in this generic framework, consistently with any other constraint.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP10(2012)040