Results 11 to 20 of about 691 (101)

Neutrino coupling to cosmological background: A review on gravitational Baryo/Leptogenesis

International Journal of Modern Physics D, 2013
In this work we review the theories of origin of matter-antimatter asymmetry in the Universe. The general conditions for achieving baryogenesis and leptogenesis in a CPT conserving field theory have been laid down by Sakharov.
Lambiase, G., Mohanty, S., Prasanna, A. R.   +2 more
core   +3 more sources

Second leptogenesis: Unraveling the baryon-lepton asymmetry discrepancy

Journal of High Energy Physics
We propose a novel scenario to explain the matter-antimatter asymmetry by twofold leptogenesis, wherein heavy Majorana neutrinos exhibit temperature-dependent masses and engage in CP-violating decays.
YeolLin ChoeJo, Kazuki Enomoto, Yechan Kim, Hye-Sung Lee   +3 more
doaj   +2 more sources

Wash-in leptogenesis after axion inflation

Journal of High Energy Physics, 2023
CP violation and the violation of baryon-minus-lepton number B−L do not necessarily have to occur simultaneously in order to accomplish successful leptogenesis.
Valerie Domcke, Kohei Kamada, Kyohei Mukaida, Kai Schmitz, Masaki Yamada   +4 more
doaj   +2 more sources

Observable r, gravitino dark matter, and non-thermal leptogenesis in no-scale supergravity

Journal of High Energy Physics, 2023
We analyse the shifted hybrid inflation in a no-scale supersymmetric SU(5) GUT model which naturally circumvents the monopole problem. The no-scale framework is derivable as the effective field theory of the supersymmetric (SUSY) compactifications of ...
Waqas Ahmed, Muhammad Moosa, Shoaib Munir, Umer Zubair   +3 more
doaj   +1 more source

Search for GeV‐Scale Sterile Neutrinos Responsible for Active Neutrino Oscillations and Baryon Asymmetry of the Universe

Advances in High Energy Physics, Volume 2012, Issue 1, 2012., 2012
Standard Model fails to explain neutrino oscillations, dark matter, and baryon asymmetry of the Universe. All these problems can be solved with three sterile neutrinos added to SM. Quite remarkably, if sterile neutrino masses are well below the electroweak scale, this modification—Neutrino Minimal Standard Model (νMSM)—can be tested experimentally.
S. N. Gninenko, D. S. Gorbunov, M. E. Shaposhnikov, Gian Luigi Fogli   +3 more
wiley   +1 more source

Filtered baryogenesis

Journal of High Energy Physics, 2022
We propose a new mechanism to simultaneously explain the observed dark matter abundance and the baryon asymmetry of the Universe. The mechanism is based on the Filtered Dark Matter scenario, where dark matter particles acquire a large mass during a first-
Michael J. Baker, Moritz Breitbach, Joachim Kopp, Lukas Mittnacht, Yotam Soreq   +4 more
doaj   +1 more source

Affleck-Dine baryogensis in large extra dimensions [PDF]

, 2001
Baryogenesis in the models where the fundamental scale is as low as TeV in the context of large extra dimensions is a challenging problem. The requirement for the departure from thermal equilibrium necessarily ties any low scale baryogenesis with that of
A. D. Dolgov, A. D. Sakharov, A. D. Sakharov, A. Mazumdar, A. Pilaftsis, A. Pérez-Lorenzana, A. Riotto, Anupam Mazumdar, B. A. Campbell, E. A. Mirabelli, G. F. Giudice, G. F. Giudice, I. Affleck, I. Antoniadis, J. L. Hewett, K. Benakli, K. R. Dienes, L. J. Hall, L. N. Chang, N. Arkani-Hamed, N. Arkani-Hamed, N. Arkani-Hamed, R. N. Mohapatra, R. N. Mohapatra, S. Davidson, T. G. Rizzo, V. Barger   +26 more
core   +2 more sources

Scalar-singlet assisted leptogenesis with CP violation from the vacuum

Journal of High Energy Physics, 2023
In the vanilla type-I seesaw leptogenesis scenario, CP violation required to generate the lepton asymmetries in the heavy Majorana neutrino decays stem from complex Dirac-type Yukawa couplings. In this paper we explore the case in which that CP violation
D. M. Barreiros, H. B. Câmara, R. G. Felipe, F. R. Joaquim   +3 more
doaj   +1 more source

Reheating and Supersymmetric Flat-Direction Baryogenesis [PDF]

, 1999
We re-examine Affleck-Dine baryo/leptogenesis from the oscillation of condensates along flat directions of the supersymmetric standard model, which attained large vevs at the end of inflationary epoque.
Affleck, Allahverdi, Allahverdi, Bruce A. Campbell, Campbell, Campbell, Campbell, Carena, Diamandis, Dine, Ellis, Ellis, Fukugita, Gaillard, Gaillard, Gaillard, Gaillard, Gherghetta, John Ellis, Kawasaki, Kofman, Kolb, Kusenko, Kuzmin, Lahanas, Linde, Olive, Ross, Rouzbeh Allahverdi, Sakharov, Sarkar   +30 more
core   +2 more sources

Leptonic CP asymmetry and Light flavored scalar

Journal of High Energy Physics, 2023
We consider a situation where right-handed neutrinos couple to a light scalar which is possibly a Nambu-Goldstone boson resulting from high-energy symmetry breaking. Its coupling is typically complex-valued and flavor-dependent.
Yoshihiko Abe, Toshimasa Ito, Koichi Yoshioka   +2 more
doaj   +1 more source