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Thermally Generated Gauge Singlet Scalars as Self-Interacting Dark Matter | | John McDonald
; | | Date: |
21 Jun 2001 | | Journal: | Phys.Rev.Lett. 88 (2002) 091304 | | Subject: | hep-ph astro-ph | | Affiliation: | CERN | | Abstract: | We show that a gauge singlet scalar S, with a coupling to the Higgs doublet of the form lambda_{S} S^{dagger}S H^{dagger}H and with the S mass entirely generated by the Higgs expectation value, has a thermally generated relic density Omega_{S} approx 0.3 if m_{S} approx (2.9-10.5)(Omega_{S}/0.3)^{1/5}(h/0.7)^{2/5} MeV for Higgs boson masses in the range 115 GeV to 1 TeV. Remarkably, this is very similar to the range (m_{S} = (6.6-15.4)eta^{2/3} MeV) required in order for the self-interaction (eta/4)(S^{dagger}S)^{2} to account for self-interacting dark matter when eta is not much smaller than 1. The corresponding coupling is lambda_{S} approx (2.7 imes 10^{-10} - 3.6 imes 10^{-9})(Omega_{S}/0.3)^{2/5}(h/0.7)^{4/5}, implying that such scalars are very weakly coupled to the Standard Model sector. | | Source: | arXiv, hep-ph/0106249 | | Other source: | [GID 763900] pmid11863993 | | Services: | Forum | Review | PDF | Favorites | |
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