Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Grohs E"'
Autor:
Grohs, E., Balantekin, A. B.
The mechanism for generating neutrino masses remains a puzzle in particle physics. If neutrino masses follow from a Dirac mass term, then neutrino states exist with opposite chirality compared to their weakly-interacting counterparts. These inactive
Externí odkaz:
http://arxiv.org/abs/2303.06576
We calculate and discuss the implications of neutrino self-interactions for the physics of weak decoupling and big bang nucleosynthesis (BBN) in the early universe. In such neutrino-sector extensions of the standard model, neutrinos may not free-stre
Externí odkaz:
http://arxiv.org/abs/2002.08557
We investigate a class of universes in which the weak interaction is not in operation. We consider how astrophysical processes are altered in the absence of weak forces, including Big Bang Nucleosynthesis (BBN), galaxy formation, molecular cloud asse
Externí odkaz:
http://arxiv.org/abs/1801.06081
Autor:
Grohs, E., Fuller, George M.
We present calculations showing how electron rest mass influences entropy flow, neutrino decoupling, and Big Bang Nucleosynthesis (BBN) in the early universe. To elucidate this physics and especially the sensitivity of BBN and related epochs to elect
Externí odkaz:
http://arxiv.org/abs/1706.03391
Publikováno v:
Phys. Rev. D 95, 063503 (2017)
We calculate Boltzmann neutrino energy transport with self-consistently coupled nuclear reactions through the weak-decoupling-nucleosynthesis epoch in an early universe with significant lepton numbers. We find that the presence of lepton asymmetry en
Externí odkaz:
http://arxiv.org/abs/1612.01986
Autor:
Grohs, E., Fuller, G. M.
The weak interaction charged current processes ($\nu_e+n\leftrightarrow p+e^-$, $\bar\nu_e +p\leftrightarrow n+e^+$, $n\leftrightarrow p+e^-+\bar\nu_e$) interconvert neutrons and protons in the early universe and have significant influence on Big Ban
Externí odkaz:
http://arxiv.org/abs/1607.02797
Publikováno v:
Phys. Rev. D 93, 083522 (2016)
We calculate the evolution of the early universe through the epochs of weak decoupling, weak freeze-out and big bang nucleosynthesis (BBN) by simultaneously coupling a full strong, electromagnetic, and weak nuclear reaction network with a multi-energ
Externí odkaz:
http://arxiv.org/abs/1512.02205
Publikováno v:
Phys. Rev. D 92, 125020 (2015)
We examine the physics of the early universe when Majorana neutrinos (electron neutrino, muon neutrino, tau neutrino) possess transition magnetic moments. These extra couplings beyond the usual weak interaction couplings alter the way neutrinos decou
Externí odkaz:
http://arxiv.org/abs/1510.00428
We show that a self-consistent and coupled treatment of the weak decoupling, big bang nucleosynthesis, and photon decoupling epochs can be used to provide new insights and constraints on neutrino sector physics from high-precision measurements of lig
Externí odkaz:
http://arxiv.org/abs/1502.02718
Publikováno v:
Phys. Rev. D 92, 125027 (2015)
We discuss how small neutrino rest masses can increase the expansion rate near the photon decoupling epoch in the early universe, causing an earlier, higher temperature freeze-out for ionization equilibrium compared to the massless neutrino case. Thi
Externí odkaz:
http://arxiv.org/abs/1412.6875