scholarly journals Consequences of Massive Neutrino to Astrophysics and Cosmology

2020 ◽  
pp. 50-58
Author(s):  
E. Comay
Keyword(s):  
Pair Production ◽  
Weak Interactions ◽  
Big Bang ◽  
Low Energy ◽  
Electromagnetic Interactions ◽  
Pair Annihilation ◽  
Massive Spin ◽  
Charged Pions ◽  
Neutrino Pair ◽  
The Big Bang

It is now recognized that a neutrino is a massive spin-1/2 particle. Consequently, neutrino- antineutrino pair production and their pair annihilation are theoretically valid processes. The data prove that the strength of weak interactions increases with collision energy. Therefore, a neutrino pair production event is expected to be a significant process in the region which is just outside the event horizon of a black hole. Another neutrino source is the pair production of particles like muons and charged pions whose decay produces neutrinos. Similarly, copious neutrino pair production events are expected to take place right after the big bang. Since a neutrino does not directly participate in electromagnetic interactions, its pair annihilation cannot directly produce photons. For this reason, a low energy neutrino-antineutrino collision can only go to another neutrino-antineutrino pair. It follows that the number of low energy neutrinos increases with time. This effect may contribute to the problem of the missing mass of the universe.

PHOTON-NEUTRINO INTERACTION IN θ-EXACT COVARIANT MODEL: PHENOMENOLOGY AND QUANTUM PROPERTIES

2012 ◽  
Vol 09 (06) ◽  
pp. 1261016 ◽  
Author(s):  
JOSIP TRAMPETIĆ
Keyword(s):  
Big Bang ◽  
Neutrino Interaction ◽  
Muon Neutrinos ◽  
Divergent Term ◽  
Big Bang Nucleosynthesis ◽  
Quantum Properties ◽  
Covariant Model ◽  
Low Energies ◽  
Neutrino Pair ◽  
The Big Bang

We construct the theta-exact covariant noncommutative model and obtain various closed constraints on the noncommutative scale from inelastic neutrino-nucleon scatterings, from plasmon decay into neutrino pair, from the Big Bang Nucleosynthesis and from the reheating phase after inflation, respectively. We find neutrino two-point function in a closed form and decoupling of the UV divergent term from softened UV/IR mixing term. Deformed dispersion relations at low energies are capable to account for the recent results from the OPERA collaboration on the superluminal speed of the muon neutrinos.

scholarly journals Dark Energy of the Photon Space, Inflation of the Charged Black Holes and Universe Evolution

2021 ◽  
Author(s):  
Jae-Kwang Hwang
Keyword(s):  
Black Holes ◽  
Dark Energy ◽  
Energy Density ◽  
Pair Production ◽  
Big Bang ◽  
Cpt Symmetry ◽  
Constant Energy ◽  
Constant Energy Density ◽  
The Big Bang ◽  
Universe Evolution

Space-time evolution of our universe is explained by using the 3-dimensional quantized space model (TQSM) based on the 4-dimensional (4-D) Euclidean space. The energy (E = cDtDV), charges and energy density (|q| = r = cDt) and absolute time (ct) are newly defined based on the 4-D Euclidean space. The photon flat space with the constant energy density of r = cDtq is proposed as the dark energy (DE). The dark energy is separated into the n DE and photon DE which create the new photon spaces with the constant energy density of r = cDtq. The v DE is from the n pair production by the CPT symmetry and the photon DE is from the photon space pair production by the T symmetry. The vacuum energy crisis and Hubble’s constant puzzle are explained by the photon space with the n DE and photon DE. The big bang and inflation of the primary black hole is connected to the accelerated space expansion and big collapse of the photon space through the universe evolution. The big bang from the nothing is the pair production of the matter universe with the positive energy and the partner anti-matter universe with the negative energy from the CPT symmetry. Our universe is the matter universe with the negative charges of electric charge (EC), lepton charge (LC) and color charge (CC). This first universe is made of dark matter -, lepton -, and quark - primary black holes with the huge negative charges which cause the Coulomb repulsive forces much bigger than the gravitational forces. The huge Coulomb forces induce the inflation of the primary black holes, that decay to the super-massive black holes and particles.

scholarly journals Interpretation of Isotopic Abundances in Interstellar Clouds

1980 ◽  
Vol 87 ◽  
pp. 427-438
Author(s):  
Michel Guélin ◽  
James Lequeux
Keyword(s):  
Cosmic Rays ◽  
Solar System ◽  
Mass Function ◽  
Big Bang ◽  
Initial Mass Function ◽  
Low Energy ◽  
Interstellar Clouds ◽  
Stellar Nucleosynthesis ◽  
Isotopic Abundances ◽  
The Big Bang

The abundances of elements in the interstellar medium (ISM) result from a complex sequence of nucleosynthetic processes which started some ten billion years ago in the Big Bang and are still going on. Their study and in particular their comparison with the stellar and the solar system abundances may give clues to: i) the properties of the early Universe, ii) the evolution of galaxies (rate of star formation, Initial Mass Function of stars, stellar nucleosynthesis and rate of ejection of matter by stars), and iii) the flux of low-energy cosmic rays. (See e.g. Reeves 1974, Audouze and Tinsley 1976).

scholarly journals Weak interactions in the big bang

Nature ◽  
1976 ◽  
Vol 259 (5539) ◽  
pp. 157-157 ◽  
Author(s):  
P. C. W. DAVIES
Keyword(s):  
Weak Interactions ◽  
Big Bang ◽  
The Big Bang

A view of the universe before the big bang

2006 ◽  
Vol 190 ◽  
pp. 15-15
Author(s):  
D CASTELVECCHI
Keyword(s):  
Big Bang ◽  
The Big Bang ◽  
The Universe

The First Galaxies in the Universe

2013 ◽  
Author(s):  
Abraham Loeb ◽  
Steven R. Furlanetto
Keyword(s):  
Galaxy Evolution ◽  
Big Bang ◽  
First Stars ◽  
Distant Galaxies ◽  
Formation And Evolution ◽  
Early Galaxies ◽  
First Galaxies ◽  
Large Telescopes ◽  
New Generation ◽  
The Big Bang

This book provides a comprehensive, self-contained introduction to one of the most exciting frontiers in astrophysics today: the quest to understand how the oldest and most distant galaxies in our universe first formed. Until now, most research on this question has been theoretical, but the next few years will bring about a new generation of large telescopes that promise to supply a flood of data about the infant universe during its first billion years after the big bang. This book bridges the gap between theory and observation. It is an invaluable reference for students and researchers on early galaxies. The book starts from basic physical principles before moving on to more advanced material. Topics include the gravitational growth of structure, the intergalactic medium, the formation and evolution of the first stars and black holes, feedback and galaxy evolution, reionization, 21-cm cosmology, and more.

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