Results 41 to 50 of about 691 (101)

Lepto-axiogenesis and the scale of supersymmetry

Journal of High Energy Physics, 2023
If the Peccei-Quinn field containing the QCD axion undergoes rotations in the early universe, the dimension-five operator responsible for neutrino masses can generate a lepton asymmetry that ultimately gives rise to the observed baryon asymmetry of the ...
Patrick Barnes, Raymond T. Co, Keisuke Harigaya, Aaron Pierce   +3 more
doaj   +1 more source

Thermal right-handed neutrino self-energy in the non-relativistic regime [PDF]

, 2012
Recently the issue of radiative corrections to leptogenesis has been raised. Considering the "strong washout" regime, in which OPE-techniques permit to streamline the setup, we report the thermal self-energy matrix of heavy right-handed neutrinos at NLO (
Laine, M.
core   +1 more source

Electroweak triplet scalar contribution to SO(10) leptogenesis

Journal of High Energy Physics
We show that electroweak triplet scalar can significantly impact baryogenesis via leptogenesis in concrete and predictive SO(10) GUTs, even when light neutrino masses arise predominantly from the type-I seesaw mechanism.
Chee Sheng Fong, Ketan M. Patel
doaj   +1 more source

Predicting the baryon asymmetry with degenerate right-handed neutrinos

Journal of High Energy Physics, 2023
We consider the generation of a baryon asymmetry in an extension of the Standard Model with two singlet Majorana fermions that are degenerate above the electroweak phase transition.
S. Sandner, P. Hernández, J. López-Pavón, N. Rius   +3 more
doaj   +1 more source

K-essential Leptogenesis

, 2002
K-essence is a possible candidate for dark energy of the Universe. In this paper we consider couplings of k-essence to the matter fields of the standard electroweak theory and study the effects of the cosmological CPT violation induced by the CPT ...
Albrecht, Allen, Amendola, Andrianov, Armendariz-Picon, Armendariz-Picon, Bean, Bertolami, Branco, Brandenberger, Buchmuller, Buchmuller, Carroll, Chen, Chiba, Chiba, Chiba, Chiba, Cohen, Colladay, Colladay, Damour, Ellis, Felice, Frieman, Fujii, Fukugida, Hannestad, Klinkhamer, Kolb, Kolda, Kuzmin, Langacker, Li, Luty, Manton, Mingzhe Li, Mocioiu, Mohapatra, Peccei, Peebles, Pelmutter, Perrotta, Ratra, Rodejohann, Sakharov, Sarkar, Skordis, Spergel, Steinhardt, Trodden, Turner, Uzan, Webb, Wetterich, Xinmin Zhang, Yamaguchi, Zlatev   +57 more
core   +1 more source

A bound on neutrino masses from baryogenesis [PDF]

, 2002
Properties of neutrinos, the lightest of all elementary particles, may be the origin of the entire matter-antimatter asymmetry of the universe. This requires that neutrinos are Majorana particles, which are equal to their antiparticles, and that their ...
't Hooft, Ahmad, Ahmad, Bonn, Buchmüller, Buchmüller, Davidson, de Bernardis, Elgaroy, Fields, Fritzsch, Fukugita, Gell-Mann, Georgi, Hu, Klapdor-Kleingrothaus, Klapdor-Kleingrothaus, Kuzmin, M Plümacher, Osipowicz, P Di Bari, Plümacher, Pryke, Sakharov, Toshito, W Buchmüller   +25 more
core   +3 more sources

Freeze-in leptogenesis with sterile neutrino self-interactions

Journal of High Energy Physics
Sterile neutrinos are a simple yet compelling addition to the Standard Model. For right-handed neutrinos with masses below the electroweak scale, leptogenesis can proceed through CP-violating oscillations of the sterile neutrinos. This is known as ARS or
María Dias Astros, Stefan Vogl
doaj   +1 more source

Consequences of f(R)-theories of gravity on gravitational leptogenesis

, 2012
f(R)-theories of gravity are reviewed in the framework of the matter-antimatter asymmetry in the Universe. The asymmetry is generated by the gravitational coupling of heavy (Majorana) neutrinos with the Ricci scalar curvature. In order that the mechanism
Lambiase, G., Mohanty, S., Pizza, L.
core   +1 more source

Resummation and cancellation of the VIA source in electroweak baryogenesis

Journal of High Energy Physics, 2022
We re-derive the vev-insertion approximation (VIA) source in electroweak baryogenesis. In contrast to the original derivation, we rely solely on 1-particle-irreducible self-energy diagrams.
Marieke Postma, Jorinde van de Vis, Graham White   +2 more
doaj   +1 more source

Right-handed neutrinos as the source of density perturbations

, 2006
We study the possibility that cosmological density perturbations are generated by the inhomogeneous decay of right-handed neutrinos. This will occur if a scalar field whose fluctuations are created during inflation is coupled to the neutrino sector ...
Boubekeur, Lotfi, Creminelli, Paolo
core   +1 more source