Results 11 to 20 of about 22,084 (265)
Spontaneous symmetry breaking in the late Universe and glimpses of the early Universe phase transitions à la baryogenesis [PDF]
International Journal of Modern Physics D, 2021 Spontaneous symmetry breaking is the foundation of electroweak unification and serves as an integral part of the model building beyond the standard model of particle physics and it also finds interesting applications in the late Universe.
M. Sami, R. Gannouji
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Testing the early universe with anisotropies of the gravitational wave background [PDF]
, 2021 In this work we analyse in detail the possibility of using small and intermediate-scale gravitational wave anisotropies to constrain the inflationary particle content.
E. Dimastrogiovanni +4 more
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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
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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
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Erratum: Gravitational wave constraints on the primordial black hole dominated early universe
Journal of Cosmology and Astroparticle Physics, 2021 aINFN Sezione di Padova, I-35131 Padova, Italy bFaculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, 30-348 Krakow, Poland cKavli Institute for the Physics and Mathematics of the Universe (WPI), Chiba 277-8583, Japan ...
Guillem Domènech +2 more
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Journal of Physics: Conference Series, 2023 The D(p,γ)3He cross section at low energies affects the primordial deuterium abundance, that in turn depends on fundamental cosmological parameters such as the baryon density and the amount of relativistic particles permeating the early universe.
C. Gustavino
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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 +2 more
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The early universe is ACT-ing warm [PDF]
Journal of Cosmology and Astroparticle PhysicsThe recently released data from the Atacama Cosmology Telescope (ACT) confirms that the primordial scalar spectrum is extremely flat. This, together with current upper bounds on the tensor-to-scalar ratio, implies that the simplest models of inflation ...
A. Berera +4 more
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Gravitational waves from the sound shell model: direct and inverse phase transitions in the early Universe [PDF]
Journal of Cosmology and Astroparticle PhysicsCosmological first order phase transitions are a frequent phenomenon in particle physics beyond the Standard Model, and the corresponding gravitational wave signal offers a key probe of new physics in the early Universe.
Giulio Barni +3 more
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ELENA: a software for fast and precise computation of first order phase transitions and gravitational waves production in particle physics models [PDF]
The European Physical Journal CWe present ELENA (EvaLuator of tunnElliNg Actions), an open-source Python package designed to compute the full evolution of first-order phase transitions in the early Universe generated by particle physics models, taking into account several refinements ...
Francesco Costa +4 more
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