Zobrazeno 1 - 10
of 870
pro vyhledávání: '"Ernest Ma"'
Autor:
Ernest Ma
Publikováno v:
Physics Letters B, Vol 847, Iss , Pp 138277- (2023)
If dark matter is light, it may be due to a seesaw mechanism just as neutrinos are. It is postulated that both originate from the same type of heavy fermion anchors, either singlets or triplets. In the latter case, a shift of the W mass is predicted,
Externí odkaz:
https://doaj.org/article/9cc03763c6624384af226d5c5fcbe393
Publikováno v:
Physics Letters B, Vol 842, Iss , Pp 137981- (2023)
The dark sector is postulated to be invariant under an SU(2) gauge symmetry, spontaneously broken by a Higgs quadruplet to a conserved residual Z3×Z2 symmetry. The resulting dark matter phenomenology is studied.
Externí odkaz:
https://doaj.org/article/3b3554b7cef846b080e87e8e117136a7
Publikováno v:
Physics Letters B, Vol 835, Iss , Pp 137539- (2022)
Dark matter is postulated to transform under the non-Abelian SU(2)D gauge symmetry. Its connection to Dirac neutrino masses is explored.
Externí odkaz:
https://doaj.org/article/f48d75622e2a4f04afcaab70a3fb1a06
Autor:
Ernest Ma
Publikováno v:
Physics Letters B, Vol 833, Iss , Pp 137282- (2022)
Dark matter is postulated to be a neutral Dirac fermion, charged under a dark U(1)D gauge symmetry. Scalar partners of the quarks and leptons are also charged under U(1)D. The dark gauge boson ZD and the dark Higgs boson hD enable either freeze-out o
Externí odkaz:
https://doaj.org/article/3e0f94302b774c15b3caab4c779716b4
Autor:
Ernest Ma
Publikováno v:
Physics Letters B, Vol 833, Iss , Pp 137327- (2022)
In the framework of seesaw neutrino masses from heavy fermion triplets (Σ+,Σ0,Σ−), the addition of a light fermion singlet N and a heavy scalar triplet (ρ+,ρ0,ρ−) has some important consequences. The new particles are assumed to be odd unde
Externí odkaz:
https://doaj.org/article/b420c4fc22e84969b65f4fc83d1baaa1
Autor:
Ernest Ma
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 7, Pp 1-7 (2021)
Abstract A known mechanism for obtaining naturally light Dirac neutrinos is implemented in the context of SU(6) → SU(5) × U(1) N .
Externí odkaz:
https://doaj.org/article/387cc6008470486682d7319e8b6de2ec
Autor:
Ernest Ma
Publikováno v:
Physics Letters B, Vol 829, Iss , Pp 137104- (2022)
Radiative Dirac neutrino masses and their mixing are linked to dark matter through the non-Abelian discrete symmetry A5 of the 4-dimensional pentatope, softly broken to A4 of the 3-dimensional tetrahedron. This unifying understanding of neutrino fami
Externí odkaz:
https://doaj.org/article/c148630ba5f94cd998da32924d2b3dd0
Publikováno v:
Nuclear Physics B, Vol 978, Iss , Pp 115778- (2022)
In the simplest left-right extension of the Standard Model of particle interactions with one scalar bidoublet and one SU(2)R triplet for seesaw Majorana neutrino masses, the addition of a variety of fermion and scalar multiplets automatically makes t
Externí odkaz:
https://doaj.org/article/332995592647447d99066cd95654fc5d
Autor:
Ernest Ma
Publikováno v:
Physics Letters B, Vol 820, Iss , Pp 136561- (2021)
Extending the well-known SU(3)C×SU(3)L×SU(3)R model of quarks and leptons to include a fourth SU(3)N gauge factor, a new realization is obtained, different from leptonic color, which contains a lepton/dark symmetry with the help of an input Z4 symm
Externí odkaz:
https://doaj.org/article/d48f2519ad5c4e18b95151e106abaef7
Autor:
Ernest Ma
Publikováno v:
Physics Letters B, Vol 819, Iss , Pp 136402- (2021)
Lepton number is promoted to an U(1)L gauge symmetry in a simple extension of the standard model. The spontaneous breaking of U(1)L by three units allows a conserved Z3L lepton symmetry to remain, guaranteeing that neutrinos are Dirac fermions, which
Externí odkaz:
https://doaj.org/article/3a288bb74b69422a9bfdda3bd10a898f