Cosmological evolution of scalar fields and gravitino dark matter in gauge mediation at low reheating temperatures
Cosmological evolution of scalar fields and gravitino dark matter in gauge mediation at low reheating temperatures
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低再加热温度下规范介导中标量场和引力暗物质的宇宙学演化
DOI:
10.1088/1475-7516/2010/02/003
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发表时间:
2010
影响因子:
6.4
通讯作者:
Ferrantelli A
中科院分区:
文献类型:
--
作者:
Ferrantelli A
We consider the dynamics of the supersymmetry-breaking scalar field and the production of dark matter gravitinos via its decay in a gauge-mediated supersymmetry breaking model with metastable vacuum. We find that the scalar field amplitude and gravitino density are extremely sensitive to the parameters of the hidden sector. For the case of an O'Raifeartaigh sector, we show that the observed dark matter density can be explained by gravitinos even for low reheating temperatures T R≲ 10GeV. Such low reheating temperatures may be implied by detection of the NLSP at the LHC if its thermal freeze-out density is in conflict with BBN.
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DOI:
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1983
期刊:
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