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Title: Gravitons and dark matter in universal extra dimensions

Abstract

Models of universal extra dimensions (UED) at the TeV scale lead to the presence of Kaluza Klein (KK) excitations of the ordinary fermions and bosons of the standard model that may be observed at hadron and lepton colliders. A conserved discrete symmetry, KK-parity, ensures the stability of the lightest KK particle (LKP), which, if neutral, becomes a good dark matter particle. It has been recently shown that for a certain range of masses of the LKP a relic density consistent with the experimentally observed one may be obtained. These works, however, ignore the impact of KK graviton production at early times. Whether the G{sup 1} is the LKP or not, the G{sup n} tower thus produced can decay to the LKP, and depending on the reheating temperature, may lead to a modification of the relic density. In this article, we show that this effect may lead to a relevant modification of the range of KK masses consistent with the observed relic density. Additionally, if evidence for UED is observed experimentally, we find a stringent upper limit on the reheating temperature depending on the mass of the LKP observed.

Authors:
 [1];  [1]
  1. Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
Publication Date:
OSTI Identifier:
20864116
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 74; Journal Issue: 10; Other Information: DOI: 10.1103/PhysRevD.74.104008; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BOSONS; DENSITY; EXCITATION; GRAVITONS; HADRONS; KALUZA-KLEIN THEORY; LEPTONS; NONLUMINOUS MATTER; PARITY; PARTICLE DECAY; REST MASS; STABILITY; STANDARD MODEL; SYMMETRY; TEV RANGE

Citation Formats

Shah, Nausheen R, HEP Division, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439, Wagner, Carlos E. M., Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, and HEP Division, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439. Gravitons and dark matter in universal extra dimensions. United States: N. p., 2006. Web. doi:10.1103/PHYSREVD.74.104008.
Shah, Nausheen R, HEP Division, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439, Wagner, Carlos E. M., Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, & HEP Division, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439. Gravitons and dark matter in universal extra dimensions. United States. https://doi.org/10.1103/PHYSREVD.74.104008
Shah, Nausheen R, HEP Division, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439, Wagner, Carlos E. M., Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, and HEP Division, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439. 2006. "Gravitons and dark matter in universal extra dimensions". United States. https://doi.org/10.1103/PHYSREVD.74.104008.
@article{osti_20864116,
title = {Gravitons and dark matter in universal extra dimensions},
author = {Shah, Nausheen R and HEP Division, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439 and Wagner, Carlos E. M. and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637 and HEP Division, Argonne National Laboratory, 9700 Cass Ave., Argonne, Illinois 60439},
abstractNote = {Models of universal extra dimensions (UED) at the TeV scale lead to the presence of Kaluza Klein (KK) excitations of the ordinary fermions and bosons of the standard model that may be observed at hadron and lepton colliders. A conserved discrete symmetry, KK-parity, ensures the stability of the lightest KK particle (LKP), which, if neutral, becomes a good dark matter particle. It has been recently shown that for a certain range of masses of the LKP a relic density consistent with the experimentally observed one may be obtained. These works, however, ignore the impact of KK graviton production at early times. Whether the G{sup 1} is the LKP or not, the G{sup n} tower thus produced can decay to the LKP, and depending on the reheating temperature, may lead to a modification of the relic density. In this article, we show that this effect may lead to a relevant modification of the range of KK masses consistent with the observed relic density. Additionally, if evidence for UED is observed experimentally, we find a stringent upper limit on the reheating temperature depending on the mass of the LKP observed.},
doi = {10.1103/PHYSREVD.74.104008},
url = {https://www.osti.gov/biblio/20864116}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 10,
volume = 74,
place = {United States},
year = {Wed Nov 15 00:00:00 EST 2006},
month = {Wed Nov 15 00:00:00 EST 2006}
}