Zobrazeno 1 - 10
of 221
pro vyhledávání: '"Lawrence J. Hall"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 6, Pp 1-41 (2024)
Abstract We study the simplest theories with exact spacetime parity that solve the strong CP problem and successfully generate the cosmological baryon asymmetry via decays of right-handed neutrinos. Lower bounds are derived for the masses of the righ
Externí odkaz:
https://doaj.org/article/2d61515547f7409b9a41b2698781f8c0
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 4, Pp 1-39 (2024)
Abstract The naturalness problem of PQ symmetry motivates study of the heavy QCD axion, with masses m a > 1 MeV generated at scales above the QCD scale, and low values of the PQ symmetry breaking scale, f a . We compute the abundance of such axions i
Externí odkaz:
https://doaj.org/article/a264f1be5b734c14b295434655846337
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 3, Pp 1-23 (2024)
Abstract The strong CP problem is solved in Parity symmetric theories, with the electroweak gauge group containing SU(2) L × SU(2) R broken by the minimal set of Higgs fields. Neutrino masses may be explained by adding the same number of gauge singl
Externí odkaz:
https://doaj.org/article/bce4c891c7804f68809c61e1b918ca90
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 2, Pp 1-34 (2024)
Abstract We study the mirror world with dark matter arising from the thermal freeze-out of the lightest, stable mirror particle — the mirror electron. The dark matter abundance is achieved for mirror electrons of mass 225 GeV, fixing the mirror ele
Externí odkaz:
https://doaj.org/article/221d7f2a3b14483b8cb37b91e458d38d
Autor:
Raymond T. Co, David Dunsky, Nicolas Fernandez, Akshay Ghalsasi, Lawrence J. Hall, Keisuke Harigaya, Jessie Shelton
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 9, Pp 1-55 (2022)
Abstract Rotations of an axion field in field space provide a natural origin for an era of kination domination, where the energy density is dominated by the kinetic term of the axion field, preceded by an early era of matter domination. Remarkably, n
Externí odkaz:
https://doaj.org/article/5d2940d8c2c84184bfe0d78b1c58d424
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 4, Pp 1-22 (2021)
Abstract The vanishing of the Higgs quartic coupling at a high energy scale may be explained by Intermediate Scale Supersymmetry, where supersymmetry breaks at (109-1012) GeV. The possible range of supersymmetry breaking scales can be narrowed down b
Externí odkaz:
https://doaj.org/article/196efc8b123c4565b51bb6ede4d5fb7a
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-62 (2021)
Abstract We propose a baryogenenesis mechanism that uses a rotating condensate of a Peccei-Quinn (PQ) symmetry breaking field and the dimension-five operator that gives Majorana neutrino masses. The rotation induces charge asymmetries for the Higgs b
Externí odkaz:
https://doaj.org/article/fb3a895e79f6438884a7725c152c3c91
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 1, Pp 1-47 (2021)
Abstract The standard model Higgs quartic coupling vanishes at (109 − 1013) GeV. We study SU(2) L × SU(2) R × U(1) B−L theories that incorporate the Higgs Parity mechanism, where this becomes the scale of Left-Right symmetry breaking, v R . Fur
Externí odkaz:
https://doaj.org/article/9c765080614849e392cffa9e826fe567
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 1, Pp 1-23 (2021)
Abstract Adding an axion-like particle (ALP) to the Standard Model, with a field velocity in the early universe, simultaneously explains the observed baryon and dark matter densities. This requires one or more couplings between the ALP and photons, n
Externí odkaz:
https://doaj.org/article/78ce3617a5994b4cade8932cc90f6acc
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-31 (2020)
Abstract SU(2) L × SU(2) R gauge symmetry requires three right-handed neutrinos (N i ), one of which, N 1, can be sufficiently stable to be dark matter. In the early universe, W R exchange with the Standard Model thermal bath keeps the right-handed
Externí odkaz:
https://doaj.org/article/55693bca18eb453893bd21a16cc6ee57