CNGS

The expected neutrino fluences and event rates at Gran Sasso are given in the technical note of November 2000. As this is of interest to the experiments, the results are displayed in two neutrino energy regions, up to 30 and up to 100 GeV. For the main beam component, one finds:

n_menergy region [GeV]	1-30	1-100
n_m fluence [m^-2 (pot)^-1]	7.36 x 10^-9	7.78 x 10^-9
n_m CC events [(pot) ^-1 (kton)^-1]	5.05 x 10^-17	5.85 x 10^-17

Note that the unit ''pot'' stands for 1 proton on the CNGS target. CC events are the charged current events in the detector, i.e. events where the neutrino produces a charged lepton. The cross sections used for these calculations and for the n_t charged current events can be found here.
The results found for the unwanted neutrino species are (relative to the main n_m component):

The energy distribution of these neutrino beam fluences, as well as the radial distribution (beam-size) at Gran Sasso are shown on the following pages.
The expected number of n_tcharged current events at Gran Sasso has been estimated for the case of an ideal detector with 100% detection efficiency (for the estimated numbers as predicted by the experiments, see the corresponding web-pages). The number of ''detectable events'' is given here for the hypothesis of two-neutrino mixing with sin²(2q)=1 and various assumed mass differences, and for a nominal running year with 4.5 x 10¹⁹ protons on target:

n_tenergy region [GeV]	1-30	1-100
Dm² = 1 x 10^-3 eV²	2.44	2.53
Dm² = 3 x 10^-3 eV²	21.6	22.5
Dm² = 5 x 10^-3 eV²	58.3	60.5
Dm² = 1 x 10^-2 eV²	204	212

	n_e/ n_m	0.8 %
	anti-n_m/ n_m	2.1 %
	anti-n_e / n_m	0.07 %