Constraining Unparticle Physics with Cosmology and Astrophysics

Details Constraining Unparticle Physics with Cosmology and Astrophysics Constraining Unparticle Physics with Cosmology and Astrophysics

2007-05-24

arxiv.org/abs/0705.3636v4

Phys.Rev.Lett.99:141301,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, RevTex4. Two figures and a reference added. Some minor changes. Main results and conclusions unchanged. Version accep

Scientific paper

10.1103/PhysRevLett.99.141301

It has recently been suggested that a scale invariant "unparticle" sector with a non-trivial infrared fixed point may couple to the Standard Model (SM) via higher dimensional operators. The weakness of such interactions hides the 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.

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