A Bottom-up Approach: The Data Driven Flavour Model

A bottom-up approach has been adopted to identify a flavour model that agrees with present experimental measurements. The charged fermion mass hierarchies suggest that only the top Yukawa term should be present at the renormalisable level. The flavour symmetry of the Lagrangian including the fermion...

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Bibliographic Details
Published inMoscow University physics bulletin Vol. 77; no. 2; pp. 129 - 135
Main Author Merlo, Luca
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2022
Springer Nature B.V
Subjects
Fermions
Flavor (particle physics)
Hierarchies
Leptons
Mathematical and Computational Physics
Neutrinos
Phenomenology
Physics
Physics and Astronomy
Quarks
Theoretical
BSM physics
flavour symmetry
bottom-up approach
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Summary:A bottom-up approach has been adopted to identify a flavour model that agrees with present experimental measurements. The charged fermion mass hierarchies suggest that only the top Yukawa term should be present at the renormalisable level. The flavour symmetry of the Lagrangian including the fermionic kinetic terms and only the top Yukawa is then a combination of and factors. Lighter charged fermion and active neutrino masses and quark and lepton mixings arise considering specific spurion fields. The associated phenomenology is investigated and the model turns out to have almost the same flavour protection of the minimal flavour violation, in both quark and lepton sectors. Promoting the spurions to be dynamical fields, the associated scalar potential is also studied and a minimum is identified such that fermion masses and mixings are correctly reproduced.
ISSN:0027-1349
1934-8460
DOI:10.3103/S0027134922020680