Production of psi(2S) Mesons in ppbar Collisions at 1.96 TeV

TL;DR

This paper reports precise measurements of the production cross section of psi(2S) mesons in proton-antiproton collisions at 1.96 TeV, distinguishing prompt and B-decay sources using data from the CDF II detector.

Contribution

It provides the first detailed measurement of the differential cross section for psi(2S) production at Tevatron energies, including decay to muons and separation of production sources.

Findings

Measured integrated cross section: 3.29 ± 0.04 (stat) ± 0.32 (syst) nb.

Data collected with 1.1 fb^{-1} luminosity at Fermilab.

Results help refine QCD models of quarkonium production.

Abstract

We have measured the differential cross section for the inclusive production of psi(2S) mesons decaying to mu^{+} mu^{-1} that were produced in prompt or B-decay processes from ppbar collisions at 1.96 TeV. These measurements have been made using a data set from an integrated luminosity of 1.1 fb^{-1} collected by the CDF II detector at Fermilab. For events with transverse momentum p_{T} (psi(2S)) > 2 GeV/c and rapidity |y(psi(2S))| < 0.6 we measure the integrated inclusive cross section sigma(ppbar -> psi(2S)X) Br(psi(2S) -> mu^{+} mu^{-}) to be 3.29 +- 0.04(stat.) +- 0.32(syst.) nb.