TY - JOUR
T1 - Oscillation effects on thermalization of the neutrinos in the universe with low reheating temperature
AU - Ichikawa, Kazuhide
AU - Kawasaki, Masahiro
AU - Takahashi, Fuminobu
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/8/15
Y1 - 2005/8/15
N2 - We study how the oscillations of the neutrinos affect their thermalization process during the reheating period with temperature O(1) MeV in the early universe. We follow the evolution of the neutrino density matrices and investigate how the predictions of big bang nucleosynthesis vary with the reheating temperature. For the reheating temperature of several MeV, we find that including the oscillations makes different predictions, especially for He4 abundance. Also, the effects on the lower bound of the reheating temperature from cosmological observations are discussed.
AB - We study how the oscillations of the neutrinos affect their thermalization process during the reheating period with temperature O(1) MeV in the early universe. We follow the evolution of the neutrino density matrices and investigate how the predictions of big bang nucleosynthesis vary with the reheating temperature. For the reheating temperature of several MeV, we find that including the oscillations makes different predictions, especially for He4 abundance. Also, the effects on the lower bound of the reheating temperature from cosmological observations are discussed.
UR - http://www.scopus.com/inward/record.url?scp=33749158495&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33749158495&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.72.043522
DO - 10.1103/PhysRevD.72.043522
M3 - Article
AN - SCOPUS:33749158495
VL - 72
SP - 1
EP - 11
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 4
M1 - 043522
ER -