Zobrazeno 1 - 10
of 373
pro vyhledávání: '"S.T. Petcov"'
Autor:
S.T. Petcov
Publikováno v:
Physics Letters B, Vol 850, Iss , Pp 138540- (2024)
The problem of normalisation of the modular forms in modular invariant lepton and quark flavour models is discussed. Modular invariant normalisations of the modular forms are proposed.
Externí odkaz:
https://doaj.org/article/4ebd85318cb14570b44be9773d4b94aa
Publikováno v:
Physics Letters B, Vol 837, Iss , Pp 137643- (2023)
We consider low-energy tests of low-scale leptogenesis based on the type I seesaw scenario with three right-handed singlet neutrinos νlR. In this scenario, successful leptogenesis is possible for quasi-degenerate in mass heavy Majorana neutrinos N1,
Externí odkaz:
https://doaj.org/article/117b1bc6b4ea4a419a7764e38f2c9f8d
Autor:
P.D. Bolton, S.T. Petcov
Publikováno v:
Physics Letters B, Vol 833, Iss , Pp 137296- (2022)
Working within the Standard Model effective field theory approach, we examine the possibility to test charged lepton flavour violating (cLFV) new physics (NP) by angular measurements of the outgoing electron and positrons in the polarised μ+→e+e+e
Externí odkaz:
https://doaj.org/article/435b9aeb0e2d4c48b6bef235e199dfd6
Publikováno v:
Nuclear Physics B, Vol 973, Iss , Pp 115597- (2021)
We consider sub-TeV scale flavoured resonant leptogenesis within the minimal type-I seesaw scenario with two right-handed singlet neutrinos N1,2 forming a pseudo-Dirac pair, concentrating on the case of masses of the pseudo-Dirac pair having values M
Externí odkaz:
https://doaj.org/article/abd481f48a984a5bb60d7a45aebaa78a
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-24 (2019)
Abstract We examine the compatibility between the Neutrino Option, in which the electroweak scale is generated by PeV mass type I seesaw Majorana neutrinos, and leptogenesis. We find the Neutrino Option is consistent with resonant leptogenesis. Worki
Externí odkaz:
https://doaj.org/article/755fc43f492d440398a6aa8aee1d059f
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 7, Pp 1-42 (2019)
Abstract The formalism of combined finite modular and generalised CP (gCP) sym-metries for theories of flavour is developed. The corresponding consistency conditions for the two symmetry transformations acting on the modulus τ and on the matter fiel
Externí odkaz:
https://doaj.org/article/e616ec03fc3241009eba36a89a0d9a96
Publikováno v:
Physics Letters B, Vol 793, Iss , Pp 247-258 (2019)
We construct phenomenologically viable models of lepton masses and mixing based on modular A4 invariance broken to residual symmetries Z3T or Z3ST and Z2S respectively in the charged lepton and neutrino sectors. In these models the neutrino mixing ma
Externí odkaz:
https://doaj.org/article/9264edac4cbd42c08931bd7bdb0a11e3
Autor:
J.T. Penedo, S.T. Petcov
Publikováno v:
Nuclear Physics B, Vol 939, Iss , Pp 292-307 (2019)
We study models of lepton masses and mixing based on broken modular invariance. We consider invariance under the finite modular group Γ4≃S4 and focus on the minimal scenario where the expectation value of the modulus is the only source of symmetry
Externí odkaz:
https://doaj.org/article/c4a8540751c74e08817bfeb08e70f48d
Autor:
J.T. Penedo, S.T. Petcov
Publikováno v:
Physics Letters B, Vol 786, Iss , Pp 410-417 (2018)
The observation of neutrinoless double beta decay would allow to establish lepton number violation and the Majorana nature of neutrinos. The rate of this process in the case of 3-neutrino mixing is controlled by the neutrinoless double beta decay eff
Externí odkaz:
https://doaj.org/article/f530123b8bd24c92aafc183e9c5cb150
Publikováno v:
Nuclear Physics B, Vol 963, Iss , Pp 115301- (2021)
We develop the formalism of the finite modular group Γ4′≡S4′, a double cover of the modular permutation group Γ4≃S4, for theories of flavour. The integer weight k>0 of the level 4 modular forms indispensable for the formalism can be even or
Externí odkaz:
https://doaj.org/article/9cf1b92a7d504f90b148542eaf16e383