Cosmic neutrinos and their detection

Details Cosmic neutrinos and their detection Cosmic neutrinos and their detection

1999-05-20

arxiv.org/abs/astro-ph/9905258v1

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures, Proceedings of the APS meeting, Division of Particles and Fields, Los Angeles, Jan 5-9, 1999

Scientific paper

The standard Big-Bang theory predicts a cosmic neutrino background with an average number density of $\sim 100/cm^3$ per flavor. The most promising way of its detection is measuring the feeble ``neutrino wind'' forces exerted on macroscopic targets. The expected acceleration is $\sim 10^{-23} cm/s^2$ for Dirac neutrinos with a local number density $\sim 10^7/cm^3$. 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.

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