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Longevity of supersymmetric flat directions

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Longevity of supersymmetric flat directions. / Allahverdi, Rouzbeh; Mazumdar, Anupam.
In: Journal of Cosmology and Astroparticle Physics, Vol. 2007, No. 8, 23, 31.08.2006.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Allahverdi, R & Mazumdar, A 2006, 'Longevity of supersymmetric flat directions', Journal of Cosmology and Astroparticle Physics, vol. 2007, no. 8, 23. https://doi.org/10.1088/1475-7516/2007/08/023

APA

Allahverdi, R., & Mazumdar, A. (2006). Longevity of supersymmetric flat directions. Journal of Cosmology and Astroparticle Physics, 2007(8), Article 23. https://doi.org/10.1088/1475-7516/2007/08/023

Vancouver

Allahverdi R, Mazumdar A. Longevity of supersymmetric flat directions. Journal of Cosmology and Astroparticle Physics. 2006 Aug 31;2007(8):23. doi: 10.1088/1475-7516/2007/08/023

Author

Allahverdi, Rouzbeh ; Mazumdar, Anupam. / Longevity of supersymmetric flat directions. In: Journal of Cosmology and Astroparticle Physics. 2006 ; Vol. 2007, No. 8.

Bibtex

@article{84e08bdd93e0445cb7621c04c1bc2210,
title = "Longevity of supersymmetric flat directions",
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.",
keywords = "cosmology of theories beyond the SM, physics of the early universe",
author = "Rouzbeh Allahverdi and Anupam Mazumdar",
note = "9 revtex pages, v3: expanded discussion on two flat directions, minor modifications, conclusions unchanged",
year = "2006",
month = aug,
day = "31",
doi = "10.1088/1475-7516/2007/08/023",
language = "English",
volume = "2007",
journal = "Journal of Cosmology and Astroparticle Physics",
issn = "1475-7516",
publisher = "IOP Publishing",
number = "8",

}

RIS

TY - JOUR

T1 - Longevity of supersymmetric flat directions

AU - Allahverdi, Rouzbeh

AU - Mazumdar, Anupam

N1 - 9 revtex pages, v3: expanded discussion on two flat directions, minor modifications, conclusions unchanged

PY - 2006/8/31

Y1 - 2006/8/31

N2 - 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.

AB - 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.

KW - cosmology of theories beyond the SM

KW - physics of the early universe

U2 - 10.1088/1475-7516/2007/08/023

DO - 10.1088/1475-7516/2007/08/023

M3 - Journal article

VL - 2007

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

SN - 1475-7516

IS - 8

M1 - 23

ER -