Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Case for a Kilometer-Scale High Energy Neutrino Detector   Doing astronomy with photons of energies in excess of a GeV has turned out to
be extremely challenging. Efforts are underway to develop instruments that may
push astronomy to wavelengths smaller than $10^{-14}$~cm by mapping the sky in
high energy neutrinos instead. Neutrino astronomy, born with the identification
of thermonuclear fusion in the sun and the particle processes controlling the
fate of a nearby supernova, will reach outside the galaxy and make measurements
relevant to cosmology. The field is immersed in technology in the domains of
particle physics to which many of its research goals are intellectually
connected. To mind come the search for neutrino mass, cold dark matter
(supersymmetric particles?) and the monopoles of the Standard Model. While a
variety of collaborations are pioneering complementary methods by building
telescopes with effective area in excess of 0.01~km$^2$, we show here that the
natural scale of a high energy neutrino telescope is 1~km$^2$. With several
thousand optical modules and a price tag unlikely to exceed 100 million
dollars, the scope of a kilometer-scale instrument is similar to that of
experiments presently being commissioned such as the SNO neutrino observatory
in Canada and the Superkamiokande experiment in Japan.

36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas