Transverse momentum distribution of Upsilon production in hadronic collisions

Details Transverse momentum distribution of Upsilon production in hadronic collisions Transverse momentum distribution of Upsilon production in hadronic collisions

2004-04-19

arxiv.org/abs/hep-ph/0404158v3

Phys.Rev.D71:034007,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages latex; 9 postscript files of figures. Presentation improved; new figure and references added; conclusions unaltered.

Scientific paper

10.1103/PhysRevD.71.034007

We calculate the transverse momentum p_T distribution for production of the Upsilon states in hadronic reactions. For small $p_T (\leq M_\Upsilon)$, we resum to all orders in the strong coupling alpha_s the process-independent large logarithmic contributions that arise from initial-state gluon showers. We demonstrate that the p_T distribution at low p_T 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 p_T by the alpha_s^3 lowest-order non-vanishing perturbative contribution. Our results are consistent with data from the Fermilab Tevatron collider.

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