Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 10, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP10(2017)168
Keywords
Beyond Standard Model; Global Symmetries; CP violation; Quark Masses and SM Parameters
Categories
Funding
- European Union's Horizon research and innovation programme under the Marie Sklodowska-Curie [690575, 674896]
- Spanish MINECO through Ramon y Cajal programme [RYC-2015-17173]
- Spanish Agencia Estatal de Investigacion (AEI)
- EU Fondo Europeo de Desarrollo Regional (FEDER) [FPA2016-78645-P]
- Centro de excelencia Severo Ochoa Program [SEV-2016-0597]
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The solution to the Strong CP problem is analysed within the Minimal Flavour Violation (MFV) context. An Abelian factor of the complete flavour symmetry of the fermionic kinetic terms may play the role of the Peccei-Quinn symmetry in traditional axion models. Its spontaneous breaking, due to the addition of a complex scalar field to the Standard Model scalar spectrum, generates the MFV axion, which may redefine away the QCD theta parameter. It differs from the traditional QCD axion for its couplings that are governed by the fermion charges under the axial Abelian symmetry. It is also distinct from the so-called Axiflavon, as the MFV axion does not describe flavour violation, while it does induce flavour non-universality effects. The MFV axion phenomenology is discussed considering astrophysical, collider and flavour data.
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