MeV-scale reheating temperature and thermalization of oscillating neutrinos by radiative and hadronic decays of massive particles
MeV-scale reheating temperature and thermalization of oscillating neutrinos by radiative and hadronic decays of massive particles
复制标题
由大质量粒子的辐射和强子衰变引起的兆电子级再加热温度和振荡中微子的热化
DOI:
10.1088/1475-7516/2019/12/012
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发表时间:
2019
影响因子:
6.4
通讯作者:
Hannestad Steen
中科院分区:
文献类型:
--
作者:
Hasegawa Takuya;Hiroshima Nagisa;Kohri Kazunori;Hansen Rasmus S.L.;Tram Thomas;Hannestad Steen
From a theoretical point of view, there is a strong motivation to consider an MeV-scale reheating temperature induced by long-lived massive particles with masses around the weak scale, decaying only through gravitational interaction. In this study, we investigate lower limits on the reheating temperature imposed by big-bang nucleosynthesis assuming both radiative and hadronic decays of such massive particles. For the first time, effects of neutrino self-interactions and oscillations are taken into account in the neutrino thermalization calculations. By requiring consistency between theoretical and observational values of light element abundances, we find that the reheating temperature should conservatively be T RH≳ 1.8 MeV in the case of the 100% radiative decay, and T RH≳ 4–5 MeV in the case of the 100% hadronic decays for particle masses in the range of 10 GeV to 100 TeV.
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DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
M. Kawasaki;K. Kohri;N. Sugiyama
通讯作者:
N. Sugiyama
DOI:
10.1016/0550-3213(93)90175-o
发表时间:
1993-01
期刊:
Nuclear Physics
影响因子:
--
作者:
G. Sigl;G. Raffelt
通讯作者:
G. Sigl;G. Raffelt
影响因子:
9.6
作者:
S. Mikheyev;A. Smirnov
通讯作者:
S. Mikheyev;A. Smirnov
影响因子:
5
作者:
N. Bell;R. Volkas;Y. Wong
通讯作者:
Y. Wong
影响因子:
5
作者:
K. Kohri
通讯作者:
K. Kohri