Physics – Nuclear Physics
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nuphb.374..392e&link_type=abstract
Nuclear Physics B, Volume 374, Issue 2, p. 392-404.
Physics
Nuclear Physics
25
Scientific paper
We consider neutrino annihilation in a heat bath, including annihilation via the photon. We show that the annihilation cross section has high and narrow peaks corresponding to a plasmon resonance. This yields an enormous enhancement factor of O(108) in the differential cross section as compared with the purely weak contribution. We also evaluate numerically the thermally averaged neutrino annihilation rate per particle in the heat bath of the early universe to be <σ(νν --> e+e-)> ⋍ 2.93GF2T2. We have accounted for the final-state blocking factors as well as for the fact that the center-of-mass frame of collisions is not necessarily the rest frame of the heat bath. Despite the resonances, electromagnetic processes represent only a minor effect in the averaged annihilation rate.
Enqvist Kari
Kainulainen Kimmo
Semikoz Victor
No associations
LandOfFree
Neutrino annihilation in hot plasma does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Neutrino annihilation in hot plasma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutrino annihilation in hot plasma will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1739011