# Neutrino production of opposite sign dimuons in the NOMAD experiment

Abstract : The NOMAD Collaboration presents a study of opposite sign dimuon events in the framework of Leading Order QCD. A total of 2714 neutrino- and 115 antineutrino-induced opposite sign dimuon events with $E_{\mu 1}, E_{\mu 2} 4.5$ GeV, $15 E_{\nu} 300$ GeV and $Q^{2} 1\;(\mbox{GeV}/\mbox{c})^{2}$ are observed %in the data from the 1995 and 1996 runs. in the Front-Calorimeter of NOMAD during the 1995 and 1996 runs. The analysis yields a value for the charm quark mass of $m_{c} = 1.3^{+0.3\;+0.3}_{-0.3\;-0.3}\;\mbox{GeV}/\m box{c}^{2}$ and for the average semileptonic branching ratio of $B_{c} = 0.095^{+0.007\;+0.014}_{-0.007\;-0.013}$. The ratio of the strange to non-strange sea in the nucleon is measured to be $\kappa = 0.48^{+0.09 +0.17}_{-0.07 -0.12}$. The measured rate of charm-induced dimuon relative to single muon, as a function of neutrino energy, is consistent with the slow rescaling hypothesis of heavy quark production.
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Journal articles

Cited literature [12 references]

http://hal.in2p3.fr/in2p3-00006060
Contributor : Claudine Bombar <>
Submitted on : Friday, September 15, 2000 - 5:26:33 PM
Last modification on : Monday, November 23, 2020 - 4:02:11 PM
Long-term archiving on: : Friday, May 29, 2015 - 5:11:10 PM

### Identifiers

• HAL Id : in2p3-00006060, version 1

### Citation

P. Astier, D. Autiero, A. Baldisseri, M. Baldo-Ceolin, G. Ballocchi, et al.. Neutrino production of opposite sign dimuons in the NOMAD experiment. Physics Letters B, Elsevier, 2000, 486, pp.35-48. ⟨in2p3-00006060⟩

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