Bottomonium and Drell-Yan production in p-A collisions at 450 GeV

TL;DR

This paper reports measurements of bottomonium and Drell-Yan production in proton-nucleus collisions at 450 GeV, analyzing cross-sections, nuclear dependence, and transverse momentum distributions to understand heavy-quarkonium behavior.

Contribution

It provides new experimental data on Upsilon and Drell-Yan production at 450 GeV, comparing results with previous experiments and theoretical models.

Findings

Measured cross-sections and A-dependence of Upsilon and Drell-Yan yields

Compared results with other fixed-target experiments and theories

Analyzed transverse momentum distributions of dimuons

Abstract

The NA50 Collaboration has measured heavy-quarkonium production in p-A collisions at 450 GeV incident energy (sqrt(s) = 29.1 GeV). We report here results on the production of the Upsilon states and of high-mass Drell-Yan muon pairs (m > 6 GeV). The cross-section at midrapidity and the A-dependence of the measured yields are determined and compared with the results of other fixed-target experiments and with the available theoretical estimates. Finally, we also address some issues concerning the transverse momentum distributions of the measured dimuons.