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Unitarity limits on the mass and radius of dark-matter particles

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
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:18 Sep 2014 18:11

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