The D0 Run IIb Luminosity Measurement

TL;DR

This paper presents an improved measurement of the integrated luminosity and inelastic cross section for the D0 detector at Fermilab, enhancing the precision of luminosity determination during Run IIb.

Contribution

It introduces new features that significantly improve the accuracy of the luminosity measurement and reports a precise value for the luminosity constant and recorded luminosity.

Findings

Luminosity constant: 48.3 ± 1.9 ± 0.6 mb

Recorded luminosity: 9.2 ± 0.4 fb^{-1}

Relative uncertainty: 4.3%

Abstract

An assessment of the recorded integrated luminosity is presented for data collected with the D0 detector at the Fermilab Tevatron Collider from June 2006 to September 2011 (Run IIb). In addition, a measurement of the effective cross section for inelastic interactions, also referred to as the luminosity constant, is reported. This measurement incorporates new features that lead to a substantial improvement in the precision of the result. A luminosity constant of \sigma_{LM} = 48.3\pm1.9\pm0.6 mb is obtained, where the first uncertainty is due to the accuracy of the inelastic cross section used by both CDF and D0, and the second uncertainty is due to D0 sources. The recorded luminosity for the highest E_T jet trigger is L_rec = 9.2 \pm 0.4 fb^{-1}, with a relative uncertainty of 4.3%.