Flavor from the electroweak scale

A bstract We discuss the possibility that flavor hierarchies arise from the electroweak scale in a two Higgs doublet model, in which the two Higgs doublets jointly act as the flavon. Quark masses and mixing angles are explained by effective Yukawa couplings, generated by higher dimensional operators...

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Bibliographic Details
Published in:The journal of high energy physics 2015-11, Vol.2015 (11), p.1-57, Article 16
Main Authors: Bauer, Martin, Carena, Marcela, Gemmler, Katrin
Format: Article
Language:English
Subjects:
Beyond the Standard Model
Classical and Quantum Gravitation
Couplings
Demand
Elementary Particles
extended Higgs sector model
flavor
flavor symmetry
Flavours
Higgs bosons
Higgs phenomenology
High energy physics
Large Hadron Collider
Mathematical models
Physics
Physics and Astronomy
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Quantum Field Theories
Quantum Field Theory
Quantum Physics
quark masses
Quarks
Regular Article - Theoretical Physics
Relativity Theory
Searching
String Theory
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Summary:A bstract We discuss the possibility that flavor hierarchies arise from the electroweak scale in a two Higgs doublet model, in which the two Higgs doublets jointly act as the flavon. Quark masses and mixing angles are explained by effective Yukawa couplings, generated by higher dimensional operators involving quarks and Higgs doublets. Modified Higgs couplings yield important effects on the production cross sections and decay rates of the light Standard Model like Higgs. In addition, flavor changing neutral currents arise at tree-level and lead to strong constraints from meson-antimeson mixing. Remarkably, flavor constraints turn out to prefer a region in parameter space that is in excellent agreement with the one preferred by recent Higgs precision measurements at the Large Hadron Collider (LHC). Direct searches for extra scalars at the LHC lead to further constraints. Precise predictions for the production and decay modes of the additional Higgs bosons are derived, and we present benchmark scenarios for searches at the LHC Run II. Flavor breaking at the electroweak scale as well as strong coupling effects demand a UV completion at the scale of a few TeV, possibly within the reach of the LHC.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP11(2015)016