Tomohiro Yamashita
Okayama University
Slawomir Tkaczyk, Ting Miao, Dmitri Litvintsev,
Jonathan Lewis, Mary Bishai
Fermi National Accelerator Laboratory
Thomas LeCompte
Argonne National Laboratory
James Kraus
University of Illinois
Yuri Gotra
University of Pittsburgh

A description of our analysis and supporting documentation can be found in

• Measurement of the Run II Inclusive J/psi Cross-section, CDF note 6288.
• Run II Level 1 Low pT Muon Trigger Efficiency Measurement, CDF note 6162.
• Measurement of relative L3/Offline tracking efficiency, CDF note 6144.
• Efficiency of Momentum Dependent Muon Matching Cut, CDF note 6114.
• Muon-Reconstruction Efficiency for Winter 2003 Conferences, CDF note 6347.
• Measurement of the Track Reconstruction Efficiency in the COT Using a MC Track Embedding Technique, CDF note 6394.

A summary of the blessed results and plots can be found here.

Blessing Talks:

B-Group blessing talk I (PDF) 2/13/2003

B-Group blessing talk II (PDF) 3/27/2003

• The integrated J/psi cross-section in the range 0-0.25 GeV/c has been recalculated with improved modeling of the acceptance. The value of the cross-section in this range is now 9.1 nb/GeV/c ( was 7.2 nb/GeV/c at blessing). The corresponding change in the total cross-section since blessing is +1%.
• A 30% systematic uncertainty on the modeling of the acceptance in the range 0-0.25 GeV/c has been assigned. This uncertainty was underestimated at blessing (3%).
• The systematic error on the total cross-section is a direct sum of the systematic errors on the cross-section measured in each pt range. The correlated uncertainty from luminosity and pt independent reconstruction efficiencies is then added in quadrature.
• The correlated systematic uncertainty on the cross-section using the blessed luminosity, blessed CMU reconstruction efficiency and preblessed COT tracking efficiency is now +6.5% -6.7% (was +/- 6.1%).
• The total crossection with updated systematic uncertainty is now 240+/-1(stat)+35-28(syst) ( was 239.2+/-1.5(stat) +33.9-27.3 nb at blessing)