Results 31 to 40 of about 87,708 (328)

Searching for heavy leptophilic Z′: from lepton colliders to gravitational waves

Journal of High Energy Physics, 2023
We study the phenomenology of leptophilic Z′ gauge bosons at the future high-energy e + e − and μ + μ − colliders, as well as at the gravitational wave observatories.
Arnab Dasgupta, P. S. Bhupal Dev, Tao Han, Rojalin Padhan, Si Wang, Keping Xie   +5 more
doaj   +1 more source

Primordial Black Hole Formation during First-Order Phase Transitions [PDF]

, 1999
Primordial black holes (PBHs) may form in the early universe when pre-existing adiabatic density fluctuations enter into the cosmological horizon and recollapse. It has been suggested that PBH formation may be facilitated when fluctuations enter into the
B. D. Fields, B. J. Carr, C. Afonso, C. F. Alcock, C. Flynn, C. Gundlach, C. R. Evans, C. Renault, C. Schmid, C. Schmid, D. S. Graff, E. W. Kolb, G. M. Fuller, H. Kodama, J. C. Niemeyer, J. C. Niemeyer, J. C. Niemeyer, K. Cook, K. Jedamzik, K. Jedamzik, K. Jedamzik, L. J. Hall, M. Crawford, M. W. Choptuik, S. Charlot, S. W. Hawking, T. Koike, T. Nakamura, T. W. Baumgarte, W. C. Hernandez, Ya. B. Zel’dovich   +30 more
core   +2 more sources

The scalar singlet extension of the Standard Model: gravitational waves versus baryogenesis

Journal of High Energy Physics, 2023
We study the possible gravitational wave signal and the viability of baryogenesis arising from the electroweak phase transition in an extension of the Standard Model (SM) by a scalar singlet field without a ℤ2 symmetry.
John Ellis, Marek Lewicki, Marco Merchand, José Miguel No, Mateusz Zych   +4 more
doaj   +1 more source

Topological Defects and Cosmology [PDF]

, 1998
Many particle physics models of matter admit solutions corresponding to stable or long-lived topological defects. In the context of standard cosmology it is then unavoidable that such defects will form during phase transitions in the very early Universe.
A Abrikosov, A Aguirre, A Albrecht, A Albrecht, A Albrecht, A Cohen, A Cohen, A Cohen, A Cohen, A Dolgov, A Ignatiev, A Nelson, A Sakharov, A Sornborger, A Stebbins, A Stebbins, A Vilenkin, A Vilenkin, A Vilenkin, A Vilenkin, B Allen, B Allen, B Banerjee, B Banerjee, B Carter, D Bennett, D Bennett, D Toussaint, D Vollick, F Klinkhamer, G t’Hooft, H Nielsen, H Sato, I Chuang, J Borrill, J Magueijo, J Preskill, J Silk, L McLerran, L McLerran, L Perivolarapoulos, L Perivolaropoulos, M Bowick, M Dine, M Gleiser, M Hindmarsh, M Joyce, M Joyce, M Joyce, M Salomaa, M Shaposhnikov, M Shaposhnikov, M Trodden, M Yoshimura, N Kaiser, N Manton, N Turok, N Turok, N Turok, N Turok, N Turok, N Turok, N Turok, P Arnold, P Gennes de, P Mähönen, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Moessner, R Moessner, R Scherrer, Robert H. Brandenberger, S Dimopoulos, S Weinberg, S White, T Hara, T Hara, T Hara, T Vachaspati, T Vachaspati, T Vachaspati, T W B Kibble, T W B Kibble, U-L Pen, V Kuzmin, V Zanchin, W Hu, W Perkins, Ya B Zeldovich, Ya B Zel’dovich, Ya B Zel’dovich, Ya B Zel’dovich   +99 more
core   +2 more sources

Quark-Gluon Plasma in the Early Universe [PDF]

, 2001
A QCD phase transition in the early universe could have left inhomogeneities in the baryon to photon ratio and in isospin that might have affected nucleosynthesis later on.
Kapusta, Joseph I
core   +3 more sources

Relevant dilaton stabilization

Journal of High Energy Physics, 2023
We propose a simple modification of the Goldberger-Wise mechanism for stabilizing the scale of spontaneously broken conformal theories. The source of explicit conformal symmetry breaking is a relevant operator with a small coefficient, as opposed to the ...
Csaba Csáki, Michael Geller, Zamir Heller-Algazi, Ameen Ismail   +3 more
doaj   +1 more source

Axionic domain walls at Pulsar Timing Arrays: QCD bias and particle friction

Journal of High Energy Physics, 2023
The recent results from the Pulsar Timing Array (PTA) collaborations show the first evidence for the detection of a stochastic background of gravitational waves at the nHz frequencies.
Simone Blasi, Alberto Mariotti, Aäron Rase, Alexander Sevrin   +3 more
doaj   +1 more source

PBH-infused seesaw origin of matter and unique gravitational waves

Journal of High Energy Physics, 2023
The Standard Model, extended with three right-handed (RH) neutrinos, is the simplest model that can explain light neutrino masses, the baryon asymmetry of the Universe, and dark matter (DM).
Debasish Borah, Suruj Jyoti Das, Rome Samanta, Federico R. Urban   +3 more
doaj   +1 more source

Supercooled phase transitions in the very early universe

Physics Letters B, 1982
The universe might have had a prolonged exponentially expanding phase caused by its being stuck in a metastable state of the grand unified phase transition. The only way that it could exit from this exponential expansion without introducing too much inhomogeneity or spatial curvature would be through a homogeneous “bubble” solution in which quantum ...
S.W. Hawking, I.L. Moss
openaire   +1 more source

Reflections on bubble walls

Journal of High Energy Physics, 2023
We discuss the dynamics of expanding bubble walls in the presence of massive dark photons whose mass changes as they cross the wall. For sufficiently thin walls, we show that there exists a transient kinematic regime characterized by a constant ...
Isabel Garcia Garcia, Giacomo Koszegi, Rudin Petrossian-Byrne   +2 more
doaj   +1 more source