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SUMMARY:Flavored Axion Models - Robert Ziegler
DTSTART:20180615T150000Z
DTEND:20180615T160000Z
UID:TALK105871@talks.cam.ac.uk
CONTACT:Francesco Coradeschi
DESCRIPTION:I will discuss two scenarios that give rise to QCD axions with
  large flavor-violating couplings at tree-level. The first scenario is a c
 lass of generalized DFSZ models with Peccei-Quinn charges compatible with 
 a 2+1 flavor structure\, in which the flavor misalignment are treated as f
 ree parameters and control both diagonal and flavor-violating axion coupli
 ngs. This structure allows to construct axion models that have suppressed 
 couplings to nucleons and electrons\, thus relaxing the most stringent ast
 rophysical constraints. The axion can be as heavy as 0.2 eV and therefore 
 be tested at the next generation of helioscopes. In the second scenario th
 e Peccei-Quinn symmetry is identified with a U(1) Froggatt-Nielsen symmetr
 y\, so that axion couplings to fermions and photons are related to fermion
  masses and mixings. Both scenarios can be tested by precision flavor expe
 riments like NA62.
LOCATION:MR13\, CMS (Pav. E\, reach from downstairs Central Core)
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