Zobrazeno 1 - 10
of 153
pro vyhledávání: '"Junji Hisano"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 2, Pp 1-24 (2024)
Abstract In this paper, we scrutinize a radiatively generated QCD θ parameter at the two-loop level based on both full analytical loop functions with the Fock-Schwinger gauge method and the effective field theory approach, using simplified models. W
Externí odkaz:
https://doaj.org/article/4a59ba188e0d4fff870bef699b56199d
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-32 (2023)
Abstract When the QCD axion is absent in full theory, the strong CP problem has to be explained by an additional mechanism, e.g., the left-right symmetry. Even though tree-level QCD θ ¯ $$ \overline{\theta} $$ parameter is restricted by the mechani
Externí odkaz:
https://doaj.org/article/aa9bcf6ea4834f5fbea8ed92340e7d3f
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 10, Pp 1-27 (2021)
Abstract We study gamma-ray line signatures from electroweakly interacting non-abelian spin-1 dark matter (DM). In this model, Z 2-odd spin-1 particles including a DM candidate have the SU(2) L triplet-like features, and the Sommerfeld enhancement is
Externí odkaz:
https://doaj.org/article/2d4c6b4240db4ae4a1a8aa9df254c8f3
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 10, Pp 1-23 (2021)
Abstract In this paper, we derive a simplified formula of electric dipole moments (EDMs) of a fermion. In the Standard Model, it is well-known that non-trivial cancellations between some rainbow-type diagrams induced by W boson exchanges occur in the
Externí odkaz:
https://doaj.org/article/d6bc3507bb56466880b9ef7b8ba1a9d6
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 4, Pp 1-19 (2021)
Abstract Electric dipole moments (EDMs) of charged leptons arise from a new source of CP violation in the lepton sector. In this paper, we calculate the EDMs of the charged leptons in the minimal scotogenic model with two singlet fermions, and the mo
Externí odkaz:
https://doaj.org/article/60216ae8a01b4dc1b6d00161d0603497
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-29 (2020)
Abstract We propose an electroweakly interacting spin-1 dark matter (DM) model. The electroweak gauge symmetry, SU(2) L ×U(1) Y , is extended into SU(2)0 ×SU(2)1 ×SU(2)2 ×U(1) Y . A discrete symmetry exchanging SU(2)0 and SU(2)2 is imposed. This
Externí odkaz:
https://doaj.org/article/9580b98df11b4707b43d6d9ed96f1100
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 2, Pp 1-19 (2020)
Abstract In this paper, we investigate the finiteness of the Higgs effective potential in an SU( N $$ \mathcal{N} $$ ) Gauge-Higgs Unification (GHU) model defined on M4 × S 1. We obtain the Higgs effective potential at the two-loop level and find th
Externí odkaz:
https://doaj.org/article/c84b02dc6c4f40348acab76dadc7e6d6
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 1, Pp 1-22 (2020)
Abstract We investigate the maximum value of the spin-independent cross section (σ SI) in a dark matter (DM) model called the two-Higgs doublet model + a (2HDM+a). This model can explain the measured value of the DM energy density by the freeze-out
Externí odkaz:
https://doaj.org/article/51cac53dd10447a7a1d3755428dffb7c
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 2, Pp 1-31 (2019)
Abstract If dark matter (DM) is a fermion and its interactions with the standard model particles are mediated by pseudoscalar particles, the tree-level amplitude for the DM-nucleon elastic scattering is suppressed by the momentum transfer in the non-
Externí odkaz:
https://doaj.org/article/b13a81ac14ee43d38dd627e51c8a0e46
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 12, Pp 1-43 (2018)
Abstract We study the phenomenology of singlet Dirac fermion dark matter in the simplified models where the dark matter interacts with the Standard Model particles at loop-level with the help of either colored or non-colored mediators. We especially
Externí odkaz:
https://doaj.org/article/285fd41b56f943f5b5728de92508218e