arXiv subjects

J. E. Jacobsen

Publications and source records attributed to J. E. Jacobsen.

3 recordsLinked to original sources

arXiv1995

Ultra-Transparent Antarctic Ice as a Supernova Detector

We have simulated the response of a high energy neutrino telescope in deep Antarctic ice to the stream of low energy neutrinos produced by a supernova. The passage of a large flux of MeV-energy neutrinos during a period of seconds will be detected as an excess of single counting rates in all individual optical modules. We update here a previous estimate of the performance of such an instrument taking into account the recent discovery of absorption lengths of several hundred meters for near-UV photons in natural deep ice. The existing AMANDA detector can, even by the most conservative estimates, act as a galactic supernova watch.

astro-ph↗

arXiv1994

The Detection of Cold Dark Matter with Neutrino Telescopes

High energy neutrinos are produced by the annihilation of dark matter particles in our galaxy. These are presently searched for with large area, deep underground neutrino telescopes. Cold dark matter particles, trapped inside the sun, are an abundant source of such neutrinos. Back-of-the-envelope calculations are sufficient to demonstrate how neutrino telescopes are competitive with existing and future particle colliders such as the LHC in the search for weakly interacting massive cold dark matter particles. We will emphasize that a $1\,\rm km^2$ area is the natural scale for a future instrument capable of probing the full GeV--TeV mass range of cold dark matter particle candidates by searching for high energy neutrinos produced by their annihilation in the sun. We speculate on what such a detector may look like.

hep-ph↗

arXiv1993

High Energy Neutrino Telescopes Detect Supernovae

We have simulated the response of a high energy neutrino telescope to the stream of low energy neutrinos produced by a supernova. The nominal threshold of such detectors is in the GeV energy range. The passage of a large flux of MeV neutrinos during a period of seconds will nevertheless be detected as an excess of single counting rates in all individual optical modules. Detectors under construction, which consist of roughly 200 modules, will be able to detect a galactic supernova at or above the 5 $σ$ level. The rate of fake signals is, however, too large for the telescope to serve as a neutrino watch. Such capability requires detectors with roughly 3 times the number of optical modules, thus within easy reach of the next generation detectors.

hep-ph↗