Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Evan Mcdonough"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-27 (2024)
Abstract Dark photons are a theorized massive spin-1 particle which can be produced via various mechanisms, including cosmological gravitational particle production (GPP) in the early universe. In this work, we extend previous results for GPP of dark
Externí odkaz:
https://doaj.org/article/d286f5426775463a9900abfc23e4c915
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 6, Pp 1-41 (2024)
Abstract The Kalb-Ramond field is an antisymmetric, rank-two tensor field which most notably appears in the context of string theory, but has largely been unexplored in the context of cosmology. In this work, motivated by the Kalb-Ramond field in str
Externí odkaz:
https://doaj.org/article/12eb4b6b9b2b49dc8fe0c6318a2b1b82
Autor:
Evan McDonough, Marco Scalisi
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 10, Pp 1-26 (2023)
Abstract Early Dark Energy (EDE) is a prominent model to resolve the Hubble tension, which employs a dynamical axion with a periodic potential. In this work, we take first steps towards the embedding of this model into stable compactifications of str
Externí odkaz:
https://doaj.org/article/c3ea3752072b406082d77911c1220b0e
Autor:
Michele Cicoli, Matteo Licheri, Ratul Mahanta, Evan McDonough, Francisco G. Pedro, Marco Scalisi
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 6, Pp 1-48 (2023)
Abstract Early Dark Energy (EDE) is a promising model to resolve the Hubble Tension, that, informed by Cosmic Microwave Background data, features a generalization of the potential energy usually associated with axion-like particles. We develop realiz
Externí odkaz:
https://doaj.org/article/1a07822dab6841158e755d9cfdb9e894
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 2, Pp 1-34 (2023)
Abstract We study cosmological gravitational particle production as applied to “rapid-turn” models of inflation involving two scalar fields. We are interested in the production of massive spin-0 particles that only interact gravitationally and pr
Externí odkaz:
https://doaj.org/article/4ef70d8517cc487c89af0204ec11dd03
Publikováno v:
Physics Letters B, Vol 842, Iss , Pp 137956- (2023)
We investigate the contribution of higher spin particles in the signal of direct detection searches for dark matter. We consider a bosonic or fermionic higher spin dark matter (HSDM) candidate which interacts with the Standard Model via a dark U(1) m
Externí odkaz:
https://doaj.org/article/b5a9b5af9c384becb7cf6593c4779147
Publikováno v:
Physics Letters B, Vol 833, Iss , Pp 137298- (2022)
The recent observational evidence for cosmic filament spin on megaparsec scales Wang et al. (2021) [41] demands an explanation in the physics of dark matter. Conventional collisionless cold particle dark matter is conjectured to generate cosmic filam
Externí odkaz:
https://doaj.org/article/64d0839604804385a00b85dc0d85ecfb
Publikováno v:
Physics Letters B, Vol 822, Iss , Pp 136653- (2021)
We consider the implications of an ultra-light fermionic dark matter candidate that carries baryon number. This naturally arises if dark matter has a small charge under standard model baryon number whilst having an asymmetry equal and opposite to tha
Externí odkaz:
https://doaj.org/article/8874ad0e8c3b4706aaa9af70f5173f03
Publikováno v:
Physics Letters B, Vol 819, Iss , Pp 136436- (2021)
Little is known about dark matter beyond the fact that it does not interact with the standard model or itself, or else does so incredibly weakly. A natural candidate, given the history of no-go theorems against their interactions, are higher spin fie
Externí odkaz:
https://doaj.org/article/eec1b3d1ec9249b7bc7714ce55504b44
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-32 (2019)
Abstract We study the imprint of higher spin supermultiplets on cosmological correlators, namely the non-Gaussianity of the cosmic microwave background. Supersymmetry is used as a guide to introduce the contribution of fermionic higher spin particles
Externí odkaz:
https://doaj.org/article/da1c666595db48d8ad3cc4d0b79d46f4