Results 81 to 90 of about 121,587 (192)

Gravitational particle production of scalars: analytic and numerical approaches including early reheating

Journal of High Energy Physics
Cosmological gravitational particle production (GPP) is a generic mechanism by which particles are produced during the inflationary epoch. In this work we consider the GPP of massive scalars in an effort to fully understand the spectrum of the produced ...
Leah Jenks, Edward W. Kolb, Keyer Thyme
doaj   +1 more source

Two or three things particle physicists (mis)understand about (pre)heating

Nuclear Physics B
The transition from the end of inflation to a hot, thermal Universe, commonly referred to as (re)heating, is a critical yet often misunderstood phase in early Universe cosmology.
Basabendu Barman, Nicolás Bernal, Javier Rubio   +2 more
doaj   +1 more source

Spinning primordial black holes from first order phase transition

Journal of High Energy Physics
We conduct a novel study to obtain the initial spin of the primordial black holes created during a first-order phase transition due to delayed false vacuum decay.
Indra Kumar Banerjee, Ujjal Kumar Dey
doaj   +1 more source

Nonthermal heavy dark matter from a first-order phase transition

Journal of High Energy Physics
We study nonthermal production of heavy dark matter from the dynamics of the background scalar field during a first-order phase transition, predominantly from bubble collisions.
Gian F. Giudice, Hyun Min Lee, Alex Pomarol, Bibhushan Shakya   +3 more
doaj   +1 more source

Superfluid Helium 3: Link between Condensed Matter Physics and Particle Physics

, 2000
The discovery of the superfluid phases of Helium 3 in 1971 opened the door to one of the most fascinating systems known in condensed matter physics. Superfluidity of Helium 3, originating from pair condensation of Helium 3 atoms, turned out to be the ...
Vollhardt, D., Woelfle, P.
core  

Constraining particle physics models with gravitational waves from the early universe [PDF]

Dhruv Ringe
openalex   +2 more sources

Fully viable DHOST bounce with extra scalar

Journal of High Energy Physics
In this paper we construct a class of Degenerate Higher-Order Scalar-Tensor (DHOST) theories with an extra scalar field, which admits viable solutions of bouncing universe satisfying the following requirements: (i) absence of Belinski-Khalatnikov ...
Ok Song An, Jin U Kang, Yong Jin Kim, Ui Ri Mun, Un Gyong Ri   +4 more
doaj   +1 more source

On energy and particle production in cosmology: the particular case of the gravitino

Journal of High Energy Physics
It is well-known that the number of particles produced in cosmology, commonly defined in the literature from the Fock space of the instantaneous hamiltonian of the canonically normalized fields, is ambiguous.
Gabriele Casagrande, Emilian Dudas, Marco Peloso   +2 more
doaj   +1 more source

Z′-mediated dark matter with low-temperature reheating

Journal of High Energy Physics
We consider a simple extension of the standard model with fermionic dark matter (DM) and a Z′ gauge boson acting as a mediator. We also assume a scenario where cosmic reheating occurs at low temperatures due to the decay of a massive inflaton into ...
Geneviève Bélanger, Nicolás Bernal, Alexander Pukhov   +2 more
doaj   +1 more source

Studies in Higgs Physics, Particle Dark Matter, and the Early Universe

, 2017
Michael A. Fedderke
openalex   +2 more sources