Results 1 to 10 of about 2,071 (258)

Precision early universe cosmology from stochastic gravitational waves

Journal of High Energy Physics, 2022
The causal tail of stochastic gravitational waves can be used to probe the energy density in free streaming relativistic species as well as measure g * (T) and beta functions β(T) as a function of temperature.
Dawid Brzeminski, Anson Hook, Gustavo Marques-Tavares   +2 more
doaj   +1 more source

Large primordial fluctuations in gravitational waves from phase transitions

Journal of High Energy Physics, 2023
It is well-known that first-order phase transitions in the early universe can be a powerful source of observable stochastic gravitational wave backgrounds.
Arushi Bodas, Raman Sundrum
doaj   +1 more source

Probing primordial black holes from a first order phase transition through pulsar timing and gravitational wave signals

Journal of High Energy Physics, 2023
In this work, we assess the sensitivity reach of pulsar timing array (PTA) measurements to probe pointlike primordial black holes (PBHs), with an extended mass distribution, which originate from collapsed Fermi balls that are formed through the ...
Jan Tristram Acuña, Po-Yan Tseng
doaj   +1 more source

The supercooling window at weak and strong coupling

Journal of High Energy Physics, 2023
Supercooled first order phase transitions are typical of theories where conformal symmetry is predominantly spontaneously broken. In these theories the fate of the flat scalar direction is highly sensitive to the size and the scaling dimension of the ...
Noam Levi, Toby Opferkuch, Diego Redigolo   +2 more
doaj   +1 more source

Doubly peaked induced stochastic gravitational wave background: testing baryogenesis from primordial black holes

Journal of High Energy Physics, 2022
Hawking evaporation of primordial black holes (PBHs) can facilitate the generation of matter-antimatter asymmetry. We focus on ultra-low mass PBHs that briefly dominate the universe and evaporate before the big bang nucleosynthesis.
Nilanjandev Bhaumik, Anish Ghoshal, Marek Lewicki   +2 more
doaj   +1 more source

Inflation, electroweak phase transition, and Higgs searches at the LHC in the two-Higgs-doublet model

Journal of High Energy Physics, 2022
Combining the Higgs searches at the LHC, we study the Higgs inflation in the type-I and type-II two-Higgs-doublet models with non-minimally couplings to gravity.
Lei Wang
doaj   +1 more source

Axion inflation in the strong-backreaction regime: decay of the Anber-Sorbo solution

Journal of High Energy Physics, 2023
Axion inflation coupled to Abelian gauge fields via a Chern-Simons-like term of the form ϕF F ~ $$ \phi F\overset{\sim }{F} $$ represents an attractive inflationary model with a rich phenomenology, including the production of magnetic fields, black holes,
Richard von Eckardstein, Marco Peloso, Kai Schmitz, Oleksandr Sobol, Lorenzo Sorbo   +4 more
doaj   +1 more source

Dark matter substructures affect dark matter-electron scattering in xenon-based direct detection experiments

Journal of High Energy Physics, 2023
Recent sky surveys have discovered a large number of stellar substructures. It is highly likely that there are dark matter (DM) counterparts to these stellar substructures.
Tarak Nath Maity, Ranjan Laha
doaj   +1 more source

WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆N eff

Journal of High Energy Physics, 2023
In this paper, we extensively analyzed the reheating dynamics after inflation and looked into its possible implication on dark matter (DM) and inflaton phenomenology.
MD Riajul Haque, Debaprasad Maity, Rajesh Mondal   +2 more
doaj   +1 more source

Quantum interference in gravitational particle production

Journal of High Energy Physics, 2022
Previous numerical investigations of gravitational particle production during the coherent oscillation period of inflation displayed unexplained fluctuations in the spectral density of the produced particles.
Edward Basso, Daniel J. H. Chung, Edward W. Kolb, Andrew J. Long   +3 more
doaj   +1 more source