Zobrazeno 1 - 10
of 41
pro vyhledávání: '"J. I. Silva-Marcos"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 6, Pp 1-5 (2024)
Abstract We suggest a simple relation between the quark and the lepton mixing within the framework of type-I seesaw mechanism. We show that within our ansatz the empirical King–Mohapatra–Smirnov relation, which suggests a connection between the C
Externí odkaz:
https://doaj.org/article/8db7f1e7d2d84df088971aff133936de
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 2, Pp 1-8 (2023)
Abstract We put forward the conjecture that the small numbers in the $$V_\text {CKM}$$ V CKM matrix, are generated by physics beyond the Standard Model. We identify as small numbers $$V_{ub}$$ V ub and the strength of CP violation, measured by $$|\te
Externí odkaz:
https://doaj.org/article/8587b2abd2fc43f2b8f036ad0aec38e1
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 4, Pp 1-16 (2022)
Abstract We propose a minimal extension of the Standard Model where an up-type vector-like quark, denoted T, is introduced and provides a simple solution to the CKM unitarity problem. We adopt the Botella-Chau parametrization in order to extract the
Externí odkaz:
https://doaj.org/article/d149e990c84e42ad857c9b7349f93b43
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 7, Pp 1-24 (2021)
Abstract We point out that hints of deviations from unitarity in the first row of the CKM matrix may be explained by the presence of a single vector-like top. We study how the stringent experimental constraints arising from CP Violation in the kaon s
Externí odkaz:
https://doaj.org/article/5ff5b41554f54fd7a105085913f8b741
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-43 (2020)
Abstract We consider seesaw type-I models including at least one (mostly-)sterile neutrino with mass at the eV scale. Three distinct situations are found, where the presence of light extra neutrinos is naturally justified by an approximately conserve
Externí odkaz:
https://doaj.org/article/2d4443aeb1a04c8e90e55f50fe683358
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 5, Pp 1-1 (2022)
Externí odkaz:
https://doaj.org/article/6ec8f41899ed48e591240e4cde76e684
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 11, Pp 1-11 (2018)
Abstract We address the question of deviations from $$3\times 3$$ 3×3 unitarity of the leptonic mixing matrix showing that, in the framework of type I seesaw mechanism, one may have significant deviations from unitarity that can be detected at the n
Externí odkaz:
https://doaj.org/article/42b4b103a36343c4aa41f40935ab084c
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 11, Pp 1-13 (2017)
Abstract We point out that leptonic weak-basis invariants are an important tool for the study of the properties of lepton flavour models. In particular, we show that appropriately chosen invariants can give a clear indication of whether a particular
Externí odkaz:
https://doaj.org/article/f34846a3969f4646bdebe307059c1032
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 6, Pp 1-14 (2017)
Abstract We show how a novel fine-tuning problem present in the Standard Model can be solved through the introduction of a $$Z_6$$ Z 6 flavour symmetry, together with three $$Q = - 1/3$$ Q = - 1 / 3 quarks, three $$Q = 2/3$$ Q = 2 / 3 quarks, as well
Externí odkaz:
https://doaj.org/article/d407a47314a14d1bac59aded411fe69d
Publikováno v:
European Physical Journal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::954ff7a84e0f5ba861de07c370dcb3b7
https://doi.org/10.1140/epjc/s10052-022-10398-7
https://doi.org/10.1140/epjc/s10052-022-10398-7