(eng)
We present a leading order QCD analysis of a sample of neutrino induced
charged-current events with two muons in the final state originating in the
lead-scintillating fibre calorimeter of the CHORUS detector. The results are
based on a sample of 8910 neutrino and 430 antineutrino induced opposite-sign
dimuon events collected during the exposure of the detector to the CERN Wide
Band Neutrino Beam between 1995 and 1998. % with $E_{\mu 1},E_{\mu 2} > 5$ GeV
and $Q^2 > 3$ GeV$^2$ collected %between 1995 and 1998. The analysis yields a
value of the charm quark mass of $\mc = (1.26\pm 0.16 \pm 0.09) \GeVcc $ and a
value of the ratio of the strange to non-strange sea in the nucleon of $\kappa
= 0.33 \pm 0.05 \pm 0.05$, improving the results obtained in similar analyses
by previous experiments.
Comment: Submitted to Nuclear Physics B
Favart, D. ; Grégoire, G. ; Kalinin, Sergey ; Makhlioueva, I. ; Kayis-Topaksu, A. ; et. al. Leading order analysis of neutrino induced dimuon events in the CHORUS experiment. In: Nuclear Physics, Section B, Vol. 798, no. 1-2, p. 1-16 (2008)