Yukawa interactions, flavor symmetry, and non-canonical Kähler potential

Kawamura, Yoshiharu

doi:10.1093/ptep/ptz018

Cited by 7 publications

(2 citation statements)

References 54 publications

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“…Ref. (Kawamura, 2019) explores a scenario where the flavour group G remains unbroken in Yukawa interactions and the breaking is entirely due to kinetic terms. A model-independent discussion for linearly realized flavour symmetries and in the supersymmetric case can be found in ref.…”

Section: Kinetic Termsmentioning

confidence: 99%

Lepton Flavour Symmetries

Feruglio,

Romanino

2019

Preprint

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We provide a general classification of flavour symmetries according to their interplay with the proper Poincaré and gauge groups and to their linear or nonlinear action in field space. We focus on the lepton sector and we review the different types of symmetries describing neutrino masses and the lepton mixing matrix. For each type of symmetry we present several illustrative examples and we discuss specific strengths and limitations.

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Section: Kinetic Termsmentioning

confidence: 99%

Lepton Flavour Symmetries

Feruglio,

Romanino

2019

Preprint

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“…The fermion bases are chosen such that for right-handed fermions, left-handed leptons and left-handed quarks, h f † h f , h l h l † and huhu † +h d h d † are diagonal, respectively. In this basis, h † h and hh † have the same eigenvalues equal to 2m 2 f /v 2 , where v = 246GeV is the Higgs vacuum expectation value [2][3][4].…”

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confidence: 99%

Thermovortical effect and magnetobaryogenesis

Abbaslu¹,

Zadeh²,

Gousheh³

2021

Preprint

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We introduce a new source for the production of hyperelectric vortical current, which originates from the effective thermal masses of the fermions. We show that the contributions of gauge interactions to the thermal masses in the hyperelectric vortical current cancel out due to the gauge symmetries; while, those of the Yukawa interactions do not cancel out and yield Jcv ≃ (3g ′ /256π 2 )T 2 ω. We finally show that the resulting temperature-dependent vortical current leads to the generation of hypermagnetic fields and matter-antimatter asymmetries in the symmetric phase of the early Universe, in the temperature range 100GeV ≤ T ≤ 10TeV, all starting from zero initial values. In particular, we show that only a small transient vorticity fluctuation about the zero background value in the plasma can lead to the generation of observed baryon asymmetry in the Universe (BAU), even in the presence of the weak sphaleron processes which try to wash out the asymmetries.

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A bottom-up approach to fermion mass hierarchy: a case with vector-like fermions

Kawamura

2020

Progress of Theoretical and Experimental Physics

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We propose a bottom-up approach in which a structure of high-energy physics is explored by accumulating existence proofs and/or no-go theorems in the standard model or its extension. As an illustration, we study fermion mass hierarchies based on an extension of the standard model with vector-like fermions. It is shown that the magnitude of elements of Yukawa coupling matrices can become $O(1)$ and a Yukawa coupling unification can be realized in a theory beyond the extended model, if vector-like fermions mix with three families. In this case, small Yukawa couplings in the standard model can be highly sensitive to a small variation of matrix elements, and it seems that the mass hierarchy occurs as a result of fine tuning.

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Yukawa interactions, flavor symmetry, and non-canonical Kähler potential

Cited by 7 publications

References 54 publications

Lepton Flavour Symmetries

Lepton Flavour Symmetries

Thermovortical effect and magnetobaryogenesis

A bottom-up approach to fermion mass hierarchy: a case with vector-like fermions

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