Results 21 to 30 of about 691 (101)

Predictions on the neutrinoless double beta decay from the leptogenesis via the LHu flat direction [PDF]

, 2002
If the baryon asymmetry in the present universe is generated by decays of the $L H_u$ flat direction, the observed baryon asymmetry requires the mass of the lightest neutrino to be much smaller than the mass scale indicated from the atmospheric and solar
Aalseth, Affleck, Alessandrello, Allahverdi, Anisimov, Anisimov, Apollonio, Asaka, Asaka, Dine, Dine, Ejiri, Elliott, Feruglio, Fiorini, Fiorini, Fogli, Fogli, Fujii, Fujii, Fukuda, Fukuda, Fukuda, Fukugita, Gell-Mann, K. Hamaguchi, Klapdor-Kleingrothaus, Klapdor-Kleingrothaus, Klapdor-Kleingrothaus, Kuzmin, Masaaki Fujii, Moroi, Murayama, T. Yanagida, Vissani, Yanagida, Yanagida, Yanagisawa   +37 more
core   +2 more sources

The Exact WKB analysis for asymmetric scalar preheating

Journal of High Energy Physics, 2023
Using the exact WKB analysis of the higher-order differential equations, we analyze the asymmetry in dynamical particle production of a complex scalar field. The solution requires the Stokes phenomena of the fourth-order differential equation.
Seishi Enomoto, Tomohiro Matsuda
doaj   +1 more source

Distinct signatures of spinning PBH domination and evaporation: doubly peaked gravitational waves, dark relics and CMB complementarity

Journal of High Energy Physics, 2023
Ultra-low mass primordial black holes (PBH), which may briefly dominate the energy density of the universe but completely evaporate before the big bang nucleosynthesis (BBN), can lead to interesting observable signatures. In our previous work, we studied
Nilanjandev Bhaumik, Anish Ghoshal, Rajeev Kumar Jain, Marek Lewicki   +3 more
doaj   +1 more source

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

Cosmological CPT violating effect on CMB polarization

, 2008
A dark energy scalar (or a function of the Ricci scalar) coupled with the derivative to the matter fields will violate the $CPT$ symmetry during the expansion of the Universe.
Li, Mingzhe, Zhang, Xinmin
core   +1 more source

Baryogenesis and dark matter in the mirror twin Higgs

Journal of High Energy Physics, 2023
We consider a natural asymmetric dark matter (ADM) model in the mirror twin Higgs (MTH). We show that it is possible to obtain the correct dark matter (DM) abundance when a twin baryon is the DM without the need of explicit breaking of the MTH ℤ2 ...
Pedro Bittar, Gustavo Burdman, Larissa Kiriliuk   +2 more
doaj   +1 more source

Gravitational Leptogenesis and Its Signatures in CMB

, 2005
We study the phenomenologies in astrophysics and particularly in CMB associated with the gravitational leptogenesis. Our results show that future CMB polarization experiments, such as PLANCK and CMBpol will make a possible test on this class of model for
Ahmad, Ahn, Alberghi, Balaji, Bennett, Bo Feng, Brandenberger, Buchmuller, Carroll, Carroll, Carroll, Carroll, Chiba, Cohen, Davoudiasl, De Felice, Eguchi, Eisenstein, Fogli, Fukugida, Harari, Hong Li, Hu, Hu, Jaffe, Kamionkowski, Klinkhamer, Knox, Kogut, Kovac, Kuzmin, Langacker, Leahy, Leitch, Lepora, Li, Li, Li, Loredo, Lue, Luty, Maity, Manton, Mingzhe Li, Mohapatra, Nodland, Peiris, Pogosian, Sakharov, Sarkar, Scannapieco, Seljak, Shiromizu, Spergel, Tegmark, Trodden, Wardle, Xinmin Zhang, Yamaguchi, Zaldarriaga   +59 more
core   +1 more source

Z2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defects

Journal of High Energy Physics, 2022
Simple scalar-singlet extensions of the Standard Model with a (spontaneously broken) Z 2 symmetry allow for a strong first order electroweak phase transition, as sought in order to realize electroweak baryogenesis.
Andrei Angelescu, Florian Goertz, Aika Tada   +2 more
doaj   +1 more source

Gravitational Leptogenesis and Neutrino Mass Limit

, 2004
Recently Davoudiasl {\it et al} \cite{steinhardt} have introduced a new type of interaction between the Ricci scalar $R$ and the baryon current $J^{\mu}$, ${\partial_\mu R} J^{\mu}$ and proposed a mechanism for baryogenesis, the gravitational ...
A. Andrianov, A. Cohen, A. Felice, A.D. Sakharov, D. Colladay, D. Colladay, D.N. Spergel, F.R. Klinkhamer, G. Branco, Hong Li, I. Mocioiu, J. Ellis, M. Fujii, M. Fukugida, M. Li, M. Li, M. Tegmark, M. Trodden, M. Yamaguchi, M.A. Luty, Mingzhe Li, N.S. Manton, P. Gu, P. Langacker, R. Brandenberger, R.N. Mohapatra, S. Mukohyama, S.W. Allen, T. Chiba, V.A. Kuzmin, W. Buchmuller, W. Rodejohann, X. Bi, Xinmin Zhang   +33 more
core   +1 more source

Aidnogenesis via Leptogenesis and Dark Sphalerons [PDF]

, 2010
We discuss aidnogenesis, the generation of a dark matter asymmetry via new sphaleron processes associated to an extra non-abelian gauge symmetry common to both the visible and the dark sectors.
A Belyaev, Basudeb Dasgupta, D Hooper, D Hooper, D Suematsu, DB Kaplan, DE Kaplan, DN Spergel, E Aprile, E Komatsu, E Nardi, E Witten, Enrique Fernandez-Martinez, EW Kolb, G Bertone, G Jungman, G Servant, GD Kribs, GR Farrar, H An, H An, H Davoudiasl, H Georgi, H-C Cheng, J Goodman, J Shelton, JA Harvey, K Agashe, M Fukugita, M Taoso, M Taoso, Mattias Blennow, MT Frandsen, N Cosme, Nuria Rius, P Minkowski, R Barbier, R Bernabei, R Kitano, R Kitano, RN Mohapatra, S Nussinov, SC Park, SM Barr, SM Barr, SY Khlebnikov, T Banks, T Cohen, T Cohen, V Page, VA Kuzmin, Z Ahmed   +51 more
core   +3 more sources