Constraining Unparticle Physics with Cosmology and Astrophysics

Hooman Davoudiasl
Phys. Rev. Lett. 99, 141301 – Published 1 October 2007

Abstract

It has recently been suggested that a scale-invariant “unparticle” sector with a nontrivial infrared fixed point may couple to the standard model (SM) via higher-dimensional operators. The weakness of such interactions hides the unparticle phenomena at low energies. We demonstrate how cosmology and astrophysics can place significant bounds on the strength of unparticle-SM interactions. We also discuss the possibility of a having a non-negligible unparticle relic density today.

  • Figure
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  • Received 20 June 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.141301

©2007 American Physical Society

Authors & Affiliations

Hooman Davoudiasl*

  • Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, USA

  • *hooman@bnl.gov

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Vol. 99, Iss. 14 — 5 October 2007

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