Studies Of &ugr;(1s) Bottomonium State Production At The Tevatron Collider Experiment Do

The production of heavy quarkonium in hadronic collisions provides an ideal testing ground for our understanding of the production mechanisms for heavy quarks and the non- perturbative QCD effects that bind the quark pairs into quarkonium. In this analysis, the inclusive production cross section of the ϒ(1S) bottomonium state is measured using the ϒ(1 S) → μ+μ− decay mode. The data sample corresponds to an integrated luminosity of 159.1 ± 10.3 pb−1. We determine differential cross sections as functions of the ϒ(1S) transverse momentum, pUT , for three ranges of the ϒ(1S) rapidity: 0 < |yϒ| < 0.6, 0.6 < |y ϒ| < 1.2 and 1.2 < |yϒ| < 1.8. The shapes of dσ/dp T cross sections show little variation with rapidity and are consistent with the published Run I CDF measurement over the rapidity range |yϒ| < 0.4