The Diffuse Supernova Neutrino Background

Details The Diffuse Supernova Neutrino Background The Diffuse Supernova Neutrino Background

2010-04-19

arxiv.org/abs/1004.3311v1

Ann.Rev.Nucl.Part.Sci.60:439-462,2010

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Submitted to Annual Review of Nuclear and Particle Science, Volume 60. 25 pages with 7 figures.

Scientific paper

10.1146/annurev.nucl.010909.0833

The Diffuse Supernova Neutrino Background (DSNB) is the weak glow of MeV neutrinos and antineutrinos from distant core-collapse supernovae. The DSNB has not been detected yet, but the Super-Kamiokande (SK) 2003 upper limit on the electron antineutrino flux is close to predictions, now quite precise, based on astrophysical data. If SK is modified with dissolved gadolinium to reduce detector backgrounds and increase the energy range for analysis, then it should detect the DSNB at a rate of a few events per year, providing a new probe of supernova neutrino emission and the cosmic core-collapse rate. If the DSNB is not detected, then new physics will be required. Neutrino astronomy, while uniquely powerful, has proven extremely difficult -- only the Sun and the nearby Supernova 1987A have been detected to date -- so the promise of detecting new sources soon is exciting indeed.

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