Results 21 to 30 of about 177,126,089 (182)
Gravitational production of superheavy dark matter and associated cosmological signatures
Journal of High Energy Physics, 2019 We study the gravitational production of super-Hubble-mass dark matter in the very early universe. We first review the simplest scenario where dark matter is produced mainly during slow roll inflation.
Lingfeng Li +4 more
doaj +1 more source
Peccei-Quinn phase transition at LIGO
Journal of High Energy Physics, 2020 The LIGO observatories can potentially detect stochastic gravitational waves arising from phase transitions which happened in the early universe at temperatures around T ∼ 108 GeV.
Benedict von Harling +3 more
doaj +1 more source
Electroweak-symmetric dark monopoles from preheating
Journal of High Energy Physics, 2020 If the dark sector contains ’t Hooft-Polyakov monopoles and a small enough dark gauge coupling, dark monopoles could be a macroscopic dark matter candidate. Its Higgs-portal coupling to the Standard Model can modify the electroweak vacuum in the monopole
Yang Bai +2 more
doaj +1 more source
Cosmology and Particle Physics Beyond the Standard Model [PDF]
, 2021 The Standard Models (SM) of particle physics and cosmology have been great successes so far, but various observational and theoretical hints point towards new physics beyond them.
Deshpande, Kaustubh Sudhir
core +1 more source
Luminous signals of inelastic dark matter in large detectors
Journal of High Energy Physics, 2019 We study luminous dark matter signals in models with inelastic scattering. Dark matter χ 1 that scatters inelastically off elements in the Earth is kicked into an excited state χ 2 that can subsequently decay into a monoenergetic photon inside a detector.
Joshua Eby +3 more
doaj +1 more source
An inflationary probe of cosmic Higgs switching
Journal of High Energy Physics, 2020 A scalar Higgs field can be repeatedly switched on and off when it couples to a classically oscillating scalar modulus field. The modulus flips the Higgs mass term between stable and tachyonic values.
JiJi Fan, Matthew Reece, Yi Wang
doaj +1 more source
Spin-0± portal induced Dark Matter
Journal of High Energy Physics, 2018 Standard model (SM) spin-zero singlets are constrained through their di-Bosonic decay channels via an effective coupling induced by a vector-like quark (VLQ) loop at the LHC for s=13 $$ \sqrt{s}=13 $$ TeV.
Sukanta Dutta +2 more
doaj +1 more source
An update on the two singlet dark matter model
Journal of High Energy Physics, 2021 We revisit the two real singlet extension of the Standard Model with a Z 2 × Z 2 ′ $$ {Z}_2\times {Z}_2^{\prime } $$ symmetry. One of the singlet scalars S 2, by virtue of an unbroken Z 2 ′ $$ {Z}_2^{\prime } $$ symmetry, plays the role of a stable dark ...
Tanushree Basak +2 more
doaj +1 more source
Detector-size upper bounds on dark hadron lifetime from cosmology
Journal of High Energy Physics, 2019 We show that in a confining hidden valley model where the lightest hidden particles are dark hadrons that have mass splittings larger than O 0.1 $$ \mathcal{O}(0.1) $$ GeV, if the lightest dark hadron is either stable or decays into Standard Model (SM ...
Lingfeng Li, Yuhsin Tsai
doaj +1 more source
Model-independent constraints with extended dark matter EFT
Journal of High Energy Physics, 2020 We systematically explore the phenomenology of the recently proposed extended dark matter effective field theory (eDMeft), which allows for a consistent effective description of DM scenarios across different energy scales.
Tommi Alanne +4 more
doaj +1 more source