Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Strumia, A."'
Autor:
Benedetta Belfatto, Dario Buttazzo, Christian Gross, Paolo Panci, Alessandro Strumia, Natascia Vignaroli, Ludovico Vittorio, Ryoutaro Watanabe
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 6, Pp 1-33 (2022)
Abstract We explore a new mechanism for reproducing the Dark Matter (DM) abundance: scatterings of one DM particle on light Standard Model particles. Strong bounds on its decays can be satisfied if DM undergoes freeze-in and has a mass around or belo
Externí odkaz:
https://doaj.org/article/cd809769d8714e0ca600ecf548c2d3c9
Autor:
Alessandro Strumia
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-16 (2022)
Abstract We add to the Standard Model a new fermion χ with minimal baryon number 1/3. Neutron decay n → χχχ into non-relativistic χ can account for the neutron decay anomaly, compatibly with bounds from neutron stars. χ can be Dark Matter, an
Externí odkaz:
https://doaj.org/article/20ffa56d0e0b4f8ca50d142c6fc0f1dc
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 9, Pp 1-23 (2021)
Abstract First order phase transitions can leave relic pockets of false vacua and their particles, that manifest as macroscopic Dark Matter. We compute one predictive model: a gauge theory with a dark quark relic heavier than the confinement scale. D
Externí odkaz:
https://doaj.org/article/6d1d9fc1de6a4f6daca8fbaa3735e2e9
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 6, Pp 1-13 (2021)
Abstract The hypothesis that Dark Matter is one electroweak multiplet leads to predictive candidates with multi-TeV masses that can form electroweak bound states. Bound states with the same quantum numbers as electroweak vectors are found to be espec
Externí odkaz:
https://doaj.org/article/28012f8e41ea49489f73ed657d6f68ad
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 11, Pp 1-24 (2020)
Abstract We propose two models where a U(1) Peccei-Quinn global symmetry arises accidentally and is respected up to high-dimensional operators, so that the axion solution to the strong CP problem is successful even in the presence of Planck-suppresse
Externí odkaz:
https://doaj.org/article/6a50246d5db945a9a7bc82ecd04eb52d
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 1, Pp 1-20 (2020)
Abstract The cosmological constant and the Higgs mass seem unnaturally small and anthropically selected. We show that both can be efficiently scanned in Quantum Field Theories with a large enough number of vacua controllable thanks to approximated Z2
Externí odkaz:
https://doaj.org/article/99f47e71e4eb4ceca131976a81008d63
Autor:
Dario Buttazzo, Luca Di Luzio, Parsa Ghorbani, Christian Gross, Giacomo Landini, Alessandro Strumia, Daniele Teresi, Jin-Wei Wang
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 1, Pp 1-47 (2020)
Abstract We consider theories with one gauge group (SU, SO or Sp) and one scalar in a two-index representation. The renormalizable action often has accidental symmetries (such as global U(1) or unusual group parities) that lead to one or more stable
Externí odkaz:
https://doaj.org/article/4b0aa8456c264adebf8a3d28e66db9cd
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-34 (2019)
Abstract We show that a new gauge group with one new scalar leads to automatically stable Dark Matter candidates. We consider theories where the Higgs phase is dual to the confined phase: it is known that SU (2) gauge theories with a scalar doublet (
Externí odkaz:
https://doaj.org/article/e93fce045b6d4e32bf87b19ee485172b
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 8, Pp 1-22 (2018)
Abstract In dimension-less theories of dynamical generation of the weak scale, the Universe can undergo a period of low-scale inflation during which all particles are massless and undergo super-cooling. This leads to a new mechanism of generation of
Externí odkaz:
https://doaj.org/article/c0b1f5fe475c4b9fa62529404367ca33
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 10, Pp 1-40 (2017)
Abstract Dark Matter might be an accidentally stable baryon of a new confining gauge interaction. We extend previous studies exploring the possibility that the DM is made of dark quarks heavier than the dark confinement scale. The resulting phenomeno
Externí odkaz:
https://doaj.org/article/e0d94c137198428db9f21b2901828a80