Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-07-13
Astropart.Phys. 25 (2006) 47-56
Astronomy and Astrophysics
Astrophysics
18 pages, 6 figures. Typos corrected. More accurate treatment of the interaction with relic neutrino clusters. Accepted for pu
Scientific paper
10.1016/j.astropartphys.2005.11.
We present a calculation of the damping of an ultra-energetic (UHE) cosmic neutrino travelling through the thermal gas of relic neutrinos, using the formalism of finite-temperature field theory. From the self-energy diagram due to Z exchange, we obtain the annihilation cross section for an UHE neutrino interacting with an antineutrino from the background. This method allows us to derive the full expressions for the UHE neutrino transmission probability, taking into account the momentum of relic neutrinos. We compare our results with the approximations in use in the literature. We discuss the effect of thermal motion on the shape of the absorption dips for different UHE neutrino fluxes as well as in the context of relic neutrino clustering. We find that for ratios of the neutrino mass to the relic background temperature $10^2$ or smaller, the thermal broadening of the absorption lines could significantly affect the determination of the neutrino mass and of the characteristics of the population of UHE sources.
D'Olivo Juan Carlos
Nellen Lukas
Sahu Sarira
Van Elewyck Veronique
No associations
LandOfFree
UHE neutrino damping in a thermal gas of relic neutrinos 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 UHE neutrino damping in a thermal gas of relic neutrinos, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and UHE neutrino damping in a thermal gas of relic neutrinos will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-294773