We present our new measurement of the cross-section for charm dimuon production in neutrino interactions based upon the full statistics collected by the NOMAD experiment.After background subtraction we observe 15344 charm dimuon events, providing the largest sample currently available.The analysise xploits the large inclusive charged current sample–about 9×106 events after all analysiscuts–and the high resolution NOMAD detector to constrain the tota lsystematic uncertainty on the ratio of charm dimuon to inclusive Charged Current(CC) cross sections to∼2%. We also perform a fit to the NOMAD data to extract the charm production parameters and the strange quark sea content of the nucleon within the NLOQCD apprximation. We obtain a value of mc(mc)=1.159±0.075GeV/c2 for the running mass of the charm quark in the MS scheme and a strange quark sea suppression factor of ks=0.591±0.019 at Q2=20 GeV2/c2
A precision measurement of charm dimuon production in neutrino interactions from the NOMAD experiment
CONTA, CLAUDIO;FRATERNALI, MARCO;
2013-01-01
Abstract
We present our new measurement of the cross-section for charm dimuon production in neutrino interactions based upon the full statistics collected by the NOMAD experiment.After background subtraction we observe 15344 charm dimuon events, providing the largest sample currently available.The analysise xploits the large inclusive charged current sample–about 9×106 events after all analysiscuts–and the high resolution NOMAD detector to constrain the tota lsystematic uncertainty on the ratio of charm dimuon to inclusive Charged Current(CC) cross sections to∼2%. We also perform a fit to the NOMAD data to extract the charm production parameters and the strange quark sea content of the nucleon within the NLOQCD apprximation. We obtain a value of mc(mc)=1.159±0.075GeV/c2 for the running mass of the charm quark in the MS scheme and a strange quark sea suppression factor of ks=0.591±0.019 at Q2=20 GeV2/c2I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
