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$U(1)_{B-L}$ extra-natural inflation with Standard Model on a brane [PDF]
Phys. Lett. B729 (2014) 56-61, 2013 The interrelation between inflationary cosmology and new physics beyond the Standard Model (SM) is studied in a $U(1)_{B-L}$ extension of the SM embedded in a (4+1)-dimensional spacetime. In the scenario we study, the inflaton arises from the Wilson loop of the $U(1)_{B-L}$ gauge group winding an extra-dimensional cycle. Particular attention is paid to
Furuuchi, Kazuyuki, Wu, Jackson M. S.
arxiv +4 more sources
Light dark photon dark matter from inflation [PDF]
Journal of High Energy Physics, 2020 We discuss the possibility of producing a light dark photon dark matter through a coupling between the dark photon field and the inflaton. The dark photon with a large wavelength is efficiently produced due to the inflaton motion during inflation and ...
Yuichiro Nakai, Ryo Namba, Ziwei Wang
doaj +2 more sources
String fragmentation in supercooled confinement and implications for dark matter
Journal of High Energy Physics, 2021 A strongly-coupled sector can feature a supercooled confinement transition in the early universe. We point out that, when fundamental quanta of the strong sector are swept into expanding bubbles of the confined phase, the distance between them is large ...
Iason Baldes +2 more
doaj +1 more source
Avoided deconfinement in Randall-Sundrum models
Journal of High Energy Physics, 2021 We study first order phase transitions in Randall-Sundrum models in the early universe dual to confinement in large-N gauge theories. The transition rate to the confined phase is suppressed by a factor exp(− N 2), and may not complete for N » 1, instead ...
Prateek Agrawal, Michael Nee
doaj +1 more source
Resurrecting low-mass axion dark matter via a dynamical QCD scale
Journal of High Energy Physics, 2021 In the framework where the strong coupling is dynamical, the QCD sector may confine at a much higher temperature than it would in the Standard Model, and the temperature-dependent mass of the QCD axion evolves in a non-trivial way.
Lucien Heurtier +2 more
doaj +1 more source
Black hole production of monopoles in the early universe
Journal of High Energy Physics, 2021 In the early universe, evaporating black holes heat up the surrounding plasma and create a temperature profile around the black hole that can be more important than the black hole itself.
Saurav Das, Anson Hook
doaj +1 more source
Gravitational waves from dark Yang-Mills sectors
Journal of High Energy Physics, 2021 Dark Yang-Mills sectors, which are ubiquitous in the string landscape, may be reheated above their critical temperature and subsequently go through a confining first-order phase transition that produces stochastic gravitational waves in the early ...
James Halverson +4 more
doaj +1 more source
Axion fragmentation on the lattice
Journal of High Energy Physics, 2021 We analyze the phenomenon of axion fragmentation when an axion field rolls over many oscillations of a periodic potential. This is particularly relevant for the case of relaxion, in which fragmentation provides the necessary energy dissipation to stop ...
Enrico Morgante +3 more
doaj +1 more source
Current status and muon g − 2 explanation of lepton portal dark matter
Journal of High Energy Physics, 2020 In this paper, we summarize phenomenology in lepton portal dark matter (DM) models, where DM couples to leptons and extra leptons/sleptons. There are several possible setups: a DM field is either a complex/real scalar or a Dirac/Majorana fermion, and ...
Junichiro Kawamura +2 more
doaj +1 more source
Constraints on axions from cosmic distance measurements
Journal of High Energy Physics, 2022 Axion couplings to photons could induce photon-axion conversion in the presence of magnetic fields in the Universe. This conversion could impact various cosmic distance measurements, such as luminosity distances to type Ia supernovae and angular ...
Manuel A. Buen-Abad, JiJi Fan, Chen Sun
doaj +1 more source