@Article{LHCbCollaborationAaij_etal2014,
author="LHCb Collaboration (Aaij, R. et al
and Martinez-Vidal, F.
and Oyanguren, A.
and Ruiz Valls, P.
and Sanchez Mayordomo, C.",
title="Precision luminosity measurements at LHCb",
journal="Journal of Instrumentation",
year="2014",
publisher="Iop Publishing Ltd",
volume="9",
pages="P12005 - 91pp",
optkeywords="Pattern recognition; cluster finding; calibration and fitting methods; Instrumentation for particle accelerators and storage rings -- high energy (linear accelerators; synchrotrons)",
abstract="Measuring cross-sections at the LHC requires the luminosity to be determined accurately at each centre-of-mass energy root s. In this paper results are reported from the luminosity calibrations carried out at the LHC interaction point 8 with the LHCb detector for root s = 2.76, 7 and 8TeV (proton-proton collisions) and for root s(NN) = 5TeV (proton-lead collisions). Both the {\textquoteleft}{\textquoteleft}van der Meer scan{\textquoteright}{\textquoteright} and {\textquoteleft}{\textquoteleft}beam-gas imaging{\textquoteright}{\textquoteright} luminosity calibration methods were employed. It is observed that the beam density profile cannot always be described by a function that is factorizable in the two transverse coordinates. The introduction of a two-dimensional description of the beams improves significantly the consistency of the results. For proton-proton interactions at root s = 8TeV a relative precision of the luminosity calibration of 1.47{\%} is obtained using van der Meer scans and 1.43{\%} using beam-gas imaging, resulting in a combined precision of 1.12{\%}. Applying the calibration to the full data set determines the luminosity with a precision of 1.16{\%}. This represents the most precise luminosity measurement achieved so far at a bunched-beam hadron collider.",
optnote="WOS:000345859200021",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2030), last updated on Thu, 01 Jan 2015 13:50:21 +0000",
issn="1748-0221",
doi="10.1088/1748-0221/9/12/P12005",
opturl="http://arxiv.org/abs/1410.0149",
opturl="https://doi.org/10.1088/1748-0221/9/12/P12005",
archivePrefix="arXiv",
eprint="1410.0149",
language="English"
}