Consequences of neutrino self-interactions for weak decoupling and big bang nucleosynthesis
Consequences of neutrino self-interactions for weak decoupling and big bang nucleosynthesis
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中微子自相互作用对弱解耦和大爆炸核合成的影响
DOI:
10.1088/1475-7516/2020/07/001
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发表时间:
2020
影响因子:
6.4
通讯作者:
Sen, Manibrata
中科院分区:
文献类型:
--
作者:
Grohs, E.;Fuller, George M.;Sen, Manibrata
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-stream, yet can stay thermally coupled to one another. Nevertheless, the neutrinos exchange energy and entropy with the photon, electron-positron, and baryon component of the early universe only through the ordinary weak interaction. We examine the effects of neutrino self-interaction for the primordial helium and deuterium abundances and N eff, a measure of relativistic energy density at photon decoupling. These quantities are determined in, or may be influenced by, the physics in the weak decoupling epoch. Self-interacting neutrinos have been invoked to address a number of anomalies, including as a possible means of ameliorating tension in the Hubble parameter. Our calculations show that surprisingly subtle changes in BBN accompany some of these neutrino self-interaction schemes. Such minute signals require high-precision measurements, making deuterium the best abundance for BBN constraints in the models explored here.
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影响因子:
6.3
作者:
A. Arbey
通讯作者:
A. Arbey
DOI:
10.1016/j.nuclphysb.2016.08.034
发表时间:
2016
期刊:
Nuclear Physics
影响因子:
--
作者:
E. Grohs;G. Fuller
通讯作者:
G. Fuller
影响因子:
8.6
作者:
HIRATA, K;KAJITA, T;CORTEZ, BG
通讯作者:
CORTEZ, BG
DOI:
10.1103/physrevd.65.023511
发表时间:
2001
期刊:
arXiv: Instrumentation and Methods for Astrophysics
影响因子:
--
作者:
S. Hansen;G. Mangano;A. Melchiorri;G. Miele;O. Pisanti
通讯作者:
O. Pisanti
影响因子:
5
作者:
C. Kreisch;F. Cyr-Racine;O. Dor'e
通讯作者:
C. Kreisch;F. Cyr-Racine;O. Dor'e