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Longevity of supersymmetric flat directions

Allahverdi, Rouzbeh and Mazumdar, Anupam (2006) Longevity of supersymmetric flat directions. Journal of Cosmology and Astroparticle Physics, 2007 (8). ISSN 1475-7516

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Abstract

We examine the fate of supersymmetric flat directions. We argue that the non-perturbative decay of the flat direction via preheating is an unlikely event. In order to address this issue, first we identify the physical degrees of freedom and their masses in presence of a large flat direction VEV (Vacuum Expectation Value). We explicitly show that the (complex) flat direction and its fermionic partner are the only light {\it physical} fields in the spectrum. If the flat direction VEV is much larger than the weak scale, and it has a rotational motion, there will be no resonant particle production at all. The case of multiple flat directions is more involved. We illustrate that in many cases of physical interest, the situation becomes effectively the same as that of a single flat direction, or collection of independent single directions. In such cases preheating is not relevant. In an absence of a fast non-perturbative decay, the flat direction survives long enough to affect thermalization in supersymmetric models as described in hep-ph/0505050 and hep-ph/0512227. It can also ``terminate'' an early stage of non-perturbative inflaton decay as discussed in hep-ph/0603244.

Item Type: Article
Journal or Publication Title: Journal of Cosmology and Astroparticle Physics
Additional Information: 9 revtex pages, v3: expanded discussion on two flat directions, minor modifications, conclusions unchanged
Uncontrolled Keywords: cosmology of theories beyond the SM ; physics of the early universe
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63440
Deposited By: ep_importer_pure
Deposited On: 19 Apr 2013 10:00
Refereed?: Yes
Published?: Published
Last Modified: 08 Sep 2017 00:28
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/63440

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