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What Mass Are the Smallest Protohalos?

Profumo, Stefano and Sigurdson, Kris and Kamionkowski, Marc (2006) What Mass Are the Smallest Protohalos? Physical Review Letters, 97 (3). Art. No. 031301. ISSN 0031-9007.

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We calculate the kinetic-decoupling temperature for weakly interacting massive particles (WIMPs) in supersymmetric (SUSY) and extra dimensional models that can account for the cold-dark-matter abundance determined from cosmic microwave background measurements. Depending on the parameters of the particle-physics model, a wide variety of decoupling temperatures is possible, ranging from several MeV to a few GeV. These decoupling temperatures imply a range of masses for the smallest protohalos much larger than previously thought—ranging from 10-6M[direct-sum] to 102M[direct-sum]. We expect the range of protohalos masses derived here to be characteristic of most particle-physics models that can thermally accommodate the required relic abundance of WIMP dark matter, even beyond SUSY and extra dimensions.

Item Type:Article
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URLURL TypeDescription
Profumo, Stefano0000-0002-9159-7556
Sigurdson, Kris0000-0002-6729-0765
Kamionkowski, Marc0000-0001-7018-2055
Additional Information:© 2006 The American Physical Society (Received 15 March 2006; revised 8 May 2006; published 18 July 2006) K.S. is supported by NASA through Hubble Fellowship Grant No. HST-HF-01191.01-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under Contract No. NAS 5-26555. S.P. and M.K. are supported in part by DOE No. DE-FG03-92-ER40701 and FG02-05ER41361 and NASA No. NNG05GF69G.
Funding AgencyGrant Number
NASA Hubble FellowshipHST-HF-01191.01-A
NASANAS 5-26555
Department of Energy (DOE)DE-FG03-92-ER40701
Department of Energy (DOE)DE-FG02-05ER41361
Issue or Number:3
Record Number:CaltechAUTHORS:PROprl06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4627
Deposited By: Archive Administrator
Deposited On:30 Aug 2006
Last Modified:02 Oct 2019 23:14

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