skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Supernova constraints on a superlight gravitino

Abstract

In supergravity models with low supersymmetry breaking scale the gravitinos can be superlight, with mass in the 10{sup -6} eV to few keV range. In such a case, gravitino emission provides a new cooling mechanism for protoneutron stars and therefore can provide constraints on the mass of a superlight gravitino. This happens because the coupling to matter of superlight gravitinos is dominated by its goldstino component, whose coupling to matter of superlight gravitinos is dominated by its goldstino component, whose coupling to matter is inversely proportional to the scale of supersymmetry breaking and increases as the gravitino mass decreases. Present observations therefore provide lower limits on the gravitino mass. Using the recently revised goldstino couplings, we find that the two dominant processes in supernova cooling are e{sup +} e{sup -} {yields} GG and {gamma}+e{sup -} {yields} e{sup -} GG. They lead to a lower limit on the supersymmetry breaking scale {Lambda}{sub s} from 160 to 500 GeV for core temperatures 30 to 60 MeV and electron chemical potentials 200 to 300 MeV. The corresponding lower limits on the gravitino mass are .6 - 6 x 10{sup -6} eV.

Authors:
 [1];  [2];  [3]
  1. Univ. of Texas, Austin, TX (United States). Dept. of Physics
  2. Univ. of Maryland, College Park, MD (United States). Dept. of Physics
  3. Southern Methodist Univ., Dallas, TX (United States). Dept. of Physics
Publication Date:
Research Org.:
Texas Univ., Austin, TX (United States). Dept. of Physics
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
OSTI Identifier:
538933
Report Number(s):
DOE/ER/40757-105; UTEXAS-HEP-97-19; UMD-PP-98-07; SMU-HEP-97-12
ON: DE98000406; CNN: Grant PHY-9421386; TRN: 98:008501
DOE Contract Number:  
FG03-93ER40757
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: [1997]
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; SUPERNOVAE; SUPERGRAVITY; SYMMETRY BREAKING; MATHEMATICAL MODELS; SUPERSYMMETRY; ELECTRON-POSITRON INTERACTIONS

Citation Formats

Dicus, D.A., Mohapatra, R.N., and Teplitz, V.L.. Supernova constraints on a superlight gravitino. United States: N. p., 1997. Web. doi:10.2172/538933.
Dicus, D.A., Mohapatra, R.N., & Teplitz, V.L.. Supernova constraints on a superlight gravitino. United States. doi:10.2172/538933.
Dicus, D.A., Mohapatra, R.N., and Teplitz, V.L.. Wed . "Supernova constraints on a superlight gravitino". United States. doi:10.2172/538933. https://www.osti.gov/servlets/purl/538933.
@article{osti_538933,
title = {Supernova constraints on a superlight gravitino},
author = {Dicus, D.A. and Mohapatra, R.N. and Teplitz, V.L.},
abstractNote = {In supergravity models with low supersymmetry breaking scale the gravitinos can be superlight, with mass in the 10{sup -6} eV to few keV range. In such a case, gravitino emission provides a new cooling mechanism for protoneutron stars and therefore can provide constraints on the mass of a superlight gravitino. This happens because the coupling to matter of superlight gravitinos is dominated by its goldstino component, whose coupling to matter of superlight gravitinos is dominated by its goldstino component, whose coupling to matter is inversely proportional to the scale of supersymmetry breaking and increases as the gravitino mass decreases. Present observations therefore provide lower limits on the gravitino mass. Using the recently revised goldstino couplings, we find that the two dominant processes in supernova cooling are e{sup +} e{sup -} {yields} GG and {gamma}+e{sup -} {yields} e{sup -} GG. They lead to a lower limit on the supersymmetry breaking scale {Lambda}{sub s} from 160 to 500 GeV for core temperatures 30 to 60 MeV and electron chemical potentials 200 to 300 MeV. The corresponding lower limits on the gravitino mass are .6 - 6 x 10{sup -6} eV.},
doi = {10.2172/538933},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 1997},
month = {Wed Oct 01 00:00:00 EDT 1997}
}

Technical Report:

Save / Share: