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Transverse momentum distribution of Υ production in hadronic collisions

Edmond L. Berger1,*, Jianwei Qiu2,†, and Yili Wang2,‡

  • 1High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 2Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

  • *Electronic address: berger@anl.gov
  • †Electronic address: jwq@iastate.edu
  • ‡Electronic address: yiliwa@iastate.edu
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Phys. Rev. D 71, 034007 – Published 7 February, 2005

DOI: https://doi.org/10.1103/PhysRevD.71.034007

Abstract

We calculate the transverse momentum pT distribution for production of the Υ states in hadronic reactions. For small pT(≤MΥ), we resum to all orders in the strong coupling αs the process-independent large logarithmic contributions that arise from initial-state gluon showers. We demonstrate that the pT distribution at low pT is dominated by the region of small impact parameter b and that it may be computed reliably in perturbation theory. We express the cross section at large pT by the O(αs3) lowest-order nonvanishing perturbative contribution. Our results are consistent with data from the Fermilab Tevatron collider.

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Phys. Rev. D 71, 034007– Published 7 February, 2005
  • Received 19 April 2004

© 2005 American Physical Society

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