Right-handed sneutrino as cold dark matter
Right-handed sneutrino as cold dark matter
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DOI:
10.1103/physrevd.73.051301
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发表时间:
2005-12
影响因子:
5
通讯作者:
T. Asaka;Koji Ishiwata;T. Moroi
中科院分区:
文献类型:
--
作者:
T. Asaka;Koji Ishiwata;T. Moroi
We consider supersymmetric models with right-handed neutrinos where neutrino masses are purely Dirac-type. In this model, right-handed sneutrino can be the lightest supersymmetric particle and can be a viable candidate of cold dark matter of the universe. Right-handed sneutrinos are never thermalized in the early universe because of weakness of Yukawa interaction, but are effectively produced by decays of various superparticles. We show that the present mass density of right-handed sneutrino can be consistent with the observed dark matter density.