Author: C. Hagmann
Title: Cosmic neutrinos and their detection
Abstract: The standard Big-Bang theory predicts a cosmic neutrino background with an average number density of $\sim 100/{\rm cm^3}$ per flavor.The most promising way of its detection is measuring the feeble ``neutrino wind'' forces exerted on macroscopic targets. The expected acceleration is $\sim 10^{-23} {\rm cm/s^2}$ for Dirac neutrinos with a local number density $\sim 10^7/{\rm cm}^3$.A novel torsion balance design is presented, which addresses the sensitivity-limiting factors of existing balances, such as seismic and thermal noise, and angular readout resolution and stability.
Comments: 6 pages, Latex + 3 eps figures