J/{\psi},{\Upsilon}(1S) and {\chi}b(3p) Production Measurement with the ATLAS Detector

TL;DR

This paper reports measurements of J/ψ, Υ(1S), and χb(3p) production cross-sections in proton-proton collisions at the LHC, including the observation of a new χb state, and compares results to QCD predictions.

Contribution

First measurement of these quarkonium production cross-sections with the ATLAS detector, including the discovery of a new χb state via radiative transitions.

Findings

Measured differential cross-sections as functions of transverse momentum and rapidity.

Observed a new χb state through radiative decay channels.

Results are consistent with QCD predictions within uncertainties.

Abstract

The J/{\psi} and {\Upsilon}(1S) production cross-sections are measured in proton-proton collisions using the ATLAS detector at the LHC. Differential cross-sections are measured as a function of transverse momentum and rapidity. Results are compared to QCD predictions. A new {\chi}b state has been observed though radiative transitions to the {\Upsilon}(1S) and {\Upsilon}(2S) states.