Physics – High Energy Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iche.conf..632d&link_type=abstract
HIGH ENERGY PHYSICS, ICHEP 2004. Proceedings of the 32nd International Conference. Held 16-22 August 2004 in Beijing, China. Edi
Physics
High Energy Physics
Scientific paper
HERA-B is a fixed-target muti-particle spectrometer experiment at the 920 GeV HERA proton beam at DESY. The collected data sample from the 2002/2003 HERA run includes 200 million interactions recorded with a minimum bias trigger and about 300,000 J/Ψ decays recorded with a dilepton trigger. These data samples are being analyzed to extract production cross sections for J/Ψ, Υ, and charmed mesons as well as the total b-quark production cross section. Additionally, aspects of charmonium production including the χc to J/Ψ cross section ratio, the Ψ(2S) / J/Ψ cross section ratio, and the .xF , transverse momentum and atomic number dependence of the J/Ψ cross section in the target hemisphere are under investigation. Preliminary results on these topics are presented.
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