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. https://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.
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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. | ||||||||
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| Issue or Number: | 6 | ||||||||
| Record Number: | CaltechAUTHORS:GRIprl90 | ||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:GRIprl90 | ||||||||
| 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: | 02 Oct 2019 23:25 |
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