Revisiting CMB constraints on dark matter annihilation

Revisiting CMB constraints on dark matter annihilation
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DOI:
10.1088/1475-7516/2021/12/015
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发表时间:
2021-05
影响因子:
6.4
通讯作者:
M. Kawasaki;Hiromasa Nakatsuka;K. Nakayama;Toyokazu Sekiguchi
M. Kawasaki;Hiromasa Nakatsuka;K. Nakayama;Toyokazu Sekiguchi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
M. Kawasaki;Hiromasa Nakatsuka;K. Nakayama;Toyokazu Sekiguchi

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The precision measurements of the cosmic microwave background power spectrum put a strong constraint on the dark matter annihilation cross section since the electromagnetic energy injection by the dark matter annihilation affects the ionization history of the universe. In this paper, we update our previous simulation code for calculating the ionization history with the effect of dark matter annihilation by including Helium interactions and improving the precision of calculations. We give an updated constraint on the annihilation cross section and mass of dark matter using the modified RECFAST code with the Planck 2018 datasets.