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. https://resolver.caltech.edu/CaltechAUTHORS:PROprl06
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Abstract
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.
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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. | ||||||||||||
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Issue or Number: | 3 | ||||||||||||
Record Number: | CaltechAUTHORS:PROprl06 | ||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:PROprl06 | ||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||
ID Code: | 4627 | ||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||
Deposited By: | Archive Administrator | ||||||||||||
Deposited On: | 30 Aug 2006 | ||||||||||||
Last Modified: | 02 Oct 2019 23:14 |
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