Charm hadroproduction results from Selex

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ABSTRACT The SELEX experiment (E781) is 3-stage magnetic spectrometer for a high statistics study of hadroproduction of charm baryons out to large xF using 650 Gev , and p beams. The main features of the spectrometer are: a high precision silicon vertex system, powerful particle identication provided by TRD and RICH, forward s decay spectrometer and 3-stage lead glass photon detector. An experiment overview and spectrometer features are shown. Reconstructed charm states and results on c , D + particles and antiparticles produced by , and p beams at xF > 0:3 and asymmetry for c are presented. 1. Introduction Charm physics explores QCD phenomenology in both perturbative and nonperturbative regimes. Production dynamics studies test leading order (LO) and next to leading order (NLO) perturbative QCD. Charm lifetime measurements test models based on 1=MQ QCD expansions. The present xed target experiments have considerably improved the statistics but many problems remain. All exp...

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Available from: Luiz Emediato, Jun 23, 2014