scholarly journals Discovery probabilities of Majorana neutrinos based on cosmological data

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
M. Agostini ◽  
G. Benato ◽  
S. Dell’Oro ◽  
S. Pirro ◽  
F. Vissani
Keyword(s):  
Majorana Neutrinos ◽  
Cosmological Data

Effective ℒ5 Lagrangian and masses of Majorana neutrinos

2021 ◽  
pp. 2150081
Author(s):  
Olakanmi F. Akinto ◽  
Farida Tahir
Keyword(s):  
Mass Formula ◽  
Symmetric Matrix ◽  
Majorana Neutrino ◽  
Lepton Number ◽  
Neutrino Masses ◽  
Unified Theory ◽  
Grand Unified Theory ◽  
Majorana Neutrinos ◽  
Cosmological Data ◽  
Good Agreement

Using the fact that neutrinos only participate in weak and gravitational interactions, we explore the possibility of having their masses emerged at the intersection between extended electroweak theory and theory of gravity. We describe how these two seemingly incompatible theories could be embedded in a lepton-number violating 5-dimensional Lagrangian [Formula: see text]. A peculiar feature of this approach is its ability to generate effective Majorana neutrino masses via the spontaneous symmetry breaking (SSB) of Grand Unified Theory (GUT), [Formula: see text] and 4[Formula: see text] symmetric matrix of gravitational couplings. Within the purview of this theoretical framework, we obtain values for the effective Majorana mass [Formula: see text][Formula: see text]meV, and the Majorana neutrino masses [Formula: see text][Formula: see text]meV, [Formula: see text][Formula: see text]meV, [Formula: see text][Formula: see text]meV, [Formula: see text][Formula: see text]meV and [Formula: see text][Formula: see text]eV. Our results are in good agreement with both experimental and cosmological data.

scholarly journals Complete leading-order standard model corrections to quantum leptogenesis

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Paul Frederik Depta ◽  
Andreas Halsch ◽  
Janine Hütig ◽  
Sebastian Mendizabal ◽  
Owe Philipsen
Keyword(s):  
Standard Model ◽  
Gauge Coupling ◽  
Thermal Bath ◽  
Leading Order ◽  
Boltzmann Equations ◽  
The Standard Model ◽  
Majorana Neutrinos ◽  
Infinite Loop ◽  
First Time ◽  
The Universe

Abstract Thermal leptogenesis, in the framework of the standard model with three additional heavy Majorana neutrinos, provides an attractive scenario to explain the observed baryon asymmetry in the universe. It is based on the out-of-equilibrium decay of Majorana neutrinos in a thermal bath of standard model particles, which in a fully quantum field theoretical formalism is obtained by solving Kadanoff-Baym equations. So far, the leading two-loop contributions from leptons and Higgs particles are included, but not yet gauge corrections. These enter at three-loop level but, in certain kinematical regimes, require a resummation to infinite loop order for a result to leading order in the gauge coupling. In this work, we apply such a resummation to the calculation of the lepton number density. The full result for the simplest “vanilla leptogenesis” scenario is by $$ \mathcal{O} $$ O (1) increased compared to that of quantum Boltzmann equations, and for the first time permits an estimate of all theoretical uncertainties. This step completes the quantum theory of leptogenesis and forms the basis for quantitative evaluations, as well as extensions to other scenarios.

Majorana neutrinos and CP violation in the leptonic sector

1986 ◽  
Vol 180 (3) ◽  
pp. 264-268 ◽  
Author(s):  
G.C. Branco ◽  
L. Lavoura ◽  
M.N. Rebelo
Keyword(s):  
Cp Violation ◽  
Leptonic Sector ◽  
Majorana Neutrinos

scholarly journals Search for Majorana Neutrinos inB−→π+μ−μ−Decays

2014 ◽  
Vol 112 (13) ◽  
Author(s):  
R. Aaij ◽  
B. Adeva ◽  
M. Adinolfi ◽  
A. Affolder ◽  
Z. Ajaltouni ◽  
...  
Keyword(s):  
Majorana Neutrinos

scholarly journals An effective field theory for non-relativistic Majorana neutrinos

2013 ◽  
Vol 2013 (12) ◽  
Author(s):  
S. Biondini ◽  
N. Brambilla ◽  
M. A. Escobedo ◽  
A. Vairo
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Effective Field ◽  
Majorana Neutrinos

scholarly journals Higgs boson masses in the MSSM with heavy Majorana neutrinos

2011 ◽  
Vol 2011 (5) ◽  
Author(s):  
S. Heinemeyer ◽  
M. J. Herrero ◽  
S. Peñaranda ◽  
A. M. Rodríguez-Sánchez
Keyword(s):  
Higgs Boson ◽  
Majorana Neutrinos

scholarly journals Primordial magnetic field limits from cosmological data

2010 ◽  
Vol 82 (8) ◽  
Author(s):  
Tina Kahniashvili ◽  
Alexander G. Tevzadze ◽  
Shiv K. Sethi ◽  
Kanhaiya Pandey ◽  
Bharat Ratra
Keyword(s):  
Magnetic Field ◽  
Cosmological Data ◽  
Primordial Magnetic Field
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