Griest, Kim and Kamionkowski, Marc (1990) Unitarity limits on the mass and radius of dark-matter particles. Physical Review Letters, 64 (6). pp. 615-618. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:GRIprl90
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Abstract
Using partial-wave unitarity and the observed density of the Universe, we show that a stable elementary particle which was once in thermal equilibrium cannot have a mass greater than 340 TeV. An extended object which was once in thermal equilibrium cannot have a radius less than 7.5×10-7 fm. A lower limit to the relic abundance of such particles is also found.
| Item Type: | Article |
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| Additional Information: | ©1990 The American Physical Society Received 5 October 1989 We acknowledge helpful conversations with Michael Chanowitz, Rahim Esmailzadeh, Michael Turner, and Scott Willenbrock. A special acknowledgment is due to David Seckel, who originially suggested this line of research. Similar claims of a limit on the mass of dark-matter particles have been made by David Eichler and Lawrence Hall, though not based on unitarity. This work was supported in part by the DOE (at Chicago), NASA(Grant No. NGW-1340) and the DOE (at Fermilab), and by the Office of Science and Technology Centers of the NSF, under cooperative agreement AST-8809616 (at Berkeley). M.P.K. would like to thank NASA for technical assistance. |
| Record Number: | CaltechAUTHORS:GRIprl90 |
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:GRIprl90 |
| Alternative URL: | http://dx.doi.org/10.1103/PhysRevLett.64.615 |
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
| ID Code: | 5645 |
| Collection: | CaltechAUTHORS |
| Deposited By: | Archive Administrator |
| Deposited On: | 26 Oct 2006 |
| Last Modified: | 26 Dec 2012 09:14 |
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