Trapping effect for QCD axion dark matter
Trapping effect for QCD axion dark matter
复制标题
QCD轴子暗物质的捕获效应
DOI:
10.1088/1475-7516/2021/05/062
复制
发表时间:
2021
影响因子:
6.4
通讯作者:
Yamada Masaki
中科院分区:
文献类型:
--
作者:
Nakagawa Shota;Takahashi Fuminobu;Yamada Masaki
In the early universe, the potential of a scalar field can be significantly modified, and the scalar field may be trapped for a long time in a different location than the current vacuum. The trapping effect can increase or decrease the scalar abundance. For instance, in thermal inflation, a scalar field is trapped at the top of the potential by a thermal effect and dominates the universe to drive inflation for a short period of time. On the other hand, a scalar abundance can be exponentially suppressed in the adiabatic suppression mechanism, where a scalar field moves adiabatically by a time-dependent trapping potential. In this study, we investigate such a trapping effect on the abundance of scalar fields. Specifically, we investigate how the abundance of a scalar field depends on its initial position in the case of a double well potential and identify the physical quantity that controls the abundance. Then, we study the QCD axion abundance for various values of the misalignment angle, where the axon potential receives a large temporal mass due to the Witten effect. We find that the axion abundance is suppressed due to the adiabatic suppression mechanism even when it is trapped near the maximum of the potential, if the trapping effect is sufficiently large.
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影响因子:
5
作者:
P. Graham;Adam Scherlis
通讯作者:
Adam Scherlis
影响因子:
5.4
作者:
F. Bruemmer;J. Jaeckel;V. Khoze
通讯作者:
V. Khoze
影响因子:
5.4
作者:
R. Co;Eric Gonzalez;K. Harigaya
通讯作者:
K. Harigaya
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
W. Fischler;J. Preskill
通讯作者:
J. Preskill
影响因子:
5.4
作者:
Csáki, Csaba;Ruhdorfer, Maximilian;Shirman, Yuri
通讯作者:
Shirman, Yuri