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Extra dimensions, SN1987a, and nucleon-nucleon scattering data [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 2001.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
page(s) 436.4 Kilobytes : digital, PDF file
Additional Creators:
Thomas Jefferson National Accelerator Facility (U.S.), United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
One of the strongest constraints on the existence of large, compact, ''gravity-only'' dimensions comes from SN1987a. If the rate of energy loss into these putative extra dimensions is too high, then the neutrino pulse from the supernova will differ from that actually seen. The dominant mechanism for the production of Kaluza-Klein gravitons and dilatons in the supernova is via gravistrahlung and dilastrahlung from the nucleon-nucleon system. In this paper we compute the rates for these processes in a model-independent way using low-energy theorems which relate the emissivities to the measured nucleon-nucleon cross section. This is possible because for soft gravitons and dilatons the leading contribution to the energy-loss rate is from graphs in which the gravitational radiation is produced from external nucleon legs. Previous calculations neglected these mechanisms. We re-evaluate the bounds on toroidally-compactified ''gravity-only'' dimensions (GODs), and find that consistency with the observed SN1987a neutrino signal requires that if there are two such dimensions then their radius must be less than 1 micron.
Report Numbers:
E 1.99:jlab-thy-00-59
E 1.99: doe/er/40150-3209
E 1.99: nucl-th/0007016
nucl-th/0007016
doe/er/40150-3209
jlab-thy-00-59
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Other Subject(s):
Note:
Published through SciTech Connect.
02/01/2001.
"jlab-thy-00-59"
" doe/er/40150-3209"
" nucl-th/0007016"
Nuclear Physics B 595 FT
Martin J. Savage; Daniel R. Phillips; Sanjay Reddy; Christoph Hanhart.
Funding Information:
AC05-84ER40150
View MARC record | catkey: 14711513