TY - JOUR
T1 - The muon abundance in the primordial universe
AU - Rafelski, Jan
AU - Yang, Cheng Tao
N1 - Publisher Copyright:
© 2021 Jagellonian University. All rights reserved.
PY - 2021
Y1 - 2021
N2 - Muon abundance is required for the understanding of several fundamental questions regarding properties of the primordial Universe. In this paper, we evaluate the production and decay rates of muons in the cosmic plasma as a function of temperature. This allows us to determine when exactly the muon abundance disappears. When the Universe cools below the temperature kTdisappear ≈ 4.135 MeV, the muon decay rate overwhelms production rates and muons vanish quasi-instantaneously from the Universe. Interestingly, we show that at Tdisappear, the muon number is nearly equal to baryon abundance.
AB - Muon abundance is required for the understanding of several fundamental questions regarding properties of the primordial Universe. In this paper, we evaluate the production and decay rates of muons in the cosmic plasma as a function of temperature. This allows us to determine when exactly the muon abundance disappears. When the Universe cools below the temperature kTdisappear ≈ 4.135 MeV, the muon decay rate overwhelms production rates and muons vanish quasi-instantaneously from the Universe. Interestingly, we show that at Tdisappear, the muon number is nearly equal to baryon abundance.
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U2 - 10.5506/APHYSPOLB.52.277
DO - 10.5506/APHYSPOLB.52.277
M3 - Article
AN - SCOPUS:85105092107
VL - 52
SP - 277
EP - 286
JO - Acta Physica Polonica, Series B.
JF - Acta Physica Polonica, Series B.
SN - 0587-4254
IS - 3
ER -