Supernova relic neutrino background - art. no. 043001

Citation
M. Kaplinghat et al., Supernova relic neutrino background - art. no. 043001, PHYS REV D, 6204(4), 2000, pp. 3001
Citations number
33
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6204
Issue
4
Year of publication
2000
Database
ISI
SICI code
0556-2821(20000815)6204:4<3001:SRNB-A>2.0.ZU;2-3
Abstract
An upper bound to the supernova relic neutrino background from all past typ e II supernovae is obtained using observations of the universal metal enric hment history. We show that an unambiguous detection of these relic neutrin os by the SuperKamiokande detector is unlikely. We also analyze the event r ate in the Sudbury Neutrino Observatory (where coincident neutrons from <(n u)over bar>D-e-->nne(+) might enhance background rejection), and arrive at the same conclusion. If the relic neutrino flux should be observed to excee d our upper bound and if the observations of the metal enrichment history ( for z<1) are not in considerable error, then either the type II supernova r ate does not track the metal enrichment history or some mechanism may be re sponsible for transforming <(nu)over bar>(mu,tau)--><(nu)over bar>(e).