Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Salvador Centelles Chuliá"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-35 (2024)
Abstract We provide a comprehensive analysis of the Type-I Seesaw family of neutrino mass models, including the conventional type-I seesaw and its low-scale variants, namely the linear and inverse seesaws. We establish that all these models essential
Externí odkaz:
https://doaj.org/article/0518efaf397745e3909ae9bc2c944ca4
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 10, Pp 1-23 (2022)
Abstract We explore a simple but extremely predictive extension of the scotogenic model. We promote the scotogenic symmetry ℤ2 to the flavour non-Abelian symmetry Σ(81), which can also automatically protect dark matter stability. In addition, Σ(8
Externí odkaz:
https://doaj.org/article/ef5106ddebfb4f43a607c9c72bfe8dda
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-29 (2021)
Abstract After developing a general criterion for deciding which neutrino mass models belong to the category of inverse seesaw models, we apply it to obtain the Dirac analogue of the canonical Majorana inverse seesaw model. We then generalize the inv
Externí odkaz:
https://doaj.org/article/34a5660840ba4811a70f54d7df04a4dd
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 9, Pp 1-29 (2020)
Abstract We explore a common symmetrical origin for two long standing problems in particle physics: the strong CP and the fermion mass hierarchy problems. The Peccei-Quinn mechanism solves the former one with an anomalous global U(1)PQ symmetry. Here
Externí odkaz:
https://doaj.org/article/e6f26229bab54e3593fddb5b3849a710
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-33 (2019)
Abstract We provide a complete systematic classification of all two-loop realizations of the dimension four operator for Dirac neutrino masses. Our classification is multi-layered, starting first with a classification in terms of all possible distinc
Externí odkaz:
https://doaj.org/article/a2d1beab82f04701b9e3704132aa70d4
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 3, Pp 1-27 (2019)
Abstract We analyze the possible generalized CP symmetries admitted by the Tri-Bi-Maximal (TBM) neutrino mixing. Taking advantage of these symmetries we construct in a systematic way other variants of the standard TBM Ansatz. Depending on the type an
Externí odkaz:
https://doaj.org/article/16339b3a325548039b5d9975bc7be3c3
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 7, Pp 1-26 (2018)
Abstract We study the implications of generalized CP transformations acting on the mass matrices of charged leptons in a model-independent way. Generalized e − μ, e − τ and μ−τ symmetries are considered in detail. In all cases the physical
Externí odkaz:
https://doaj.org/article/ee8a800e6f6349ba97d6d240926dc8a9
Publikováno v:
Physics Letters B, Vol 781, Iss , Pp 122-128 (2018)
We describe the many pathways to generate Majorana and Dirac neutrino mass through generalized dimension-5 operators a la Weinberg. The presence of new scalars beyond the Standard Model Higgs doublet implies new possible field contractions, which are
Externí odkaz:
https://doaj.org/article/08c69461a18042d28c8421b90949ce31
Publikováno v:
Physics Letters B, Vol 773, Iss , Pp 26-33 (2017)
We propose an A4 extension of the Standard Model with a Lepton Quarticity symmetry correlating dark matter stability with the Dirac nature of neutrinos. The flavor symmetry predicts (i) a generalized bottom-tau mass relation involving all families, (
Externí odkaz:
https://doaj.org/article/0ad1ba7db3844b8aa7fcd40a9c398b3f
Publikováno v:
Physics Letters B, Vol 767, Iss C, Pp 209-213 (2017)
We propose to relate dark matter stability to the possible Dirac nature of neutrinos. The idea is illustrated in a simple scheme where small Dirac neutrino masses arise from a type-I seesaw mechanism as a result of a Z4 discrete lepton number symmetr
Externí odkaz:
https://doaj.org/article/795217b4bdd04595be5520e83ca75701