Studies of the factorisation of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMS

The factorisability of the transverse proton density functions in $x$ and $y$ is assumed in the analysis of single-plane van der Meer (vdM) scans for absolute luminosity calibration. A correction to the calibration constants for nonfactorisation effects in the proton density is then determined. The...

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Detalles Bibliográficos
Autor principal: Major, Peter
Lenguaje:eng
Publicado: SISSA 2020
Materias:
Detectors and Experimental Techniques
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.22323/1.364.0199
http://cds.cern.ch/record/2765917
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author Major, Peter
author_facet Major, Peter
author_sort Major, Peter
collection CERN
description The factorisability of the transverse proton density functions in $x$ and $y$ is assumed in the analysis of single-plane van der Meer (vdM) scans for absolute luminosity calibration. A correction to the calibration constants for nonfactorisation effects in the proton density is then determined. The precision of the evaluation of this correction is one of the dominant sources of systematic uncertainty for the Run 2 (2015-2018) luminosity measurement in CMS. The vdM calibration technique and the methods used to estimate the bias due to the factorisation assumption are discussed.
id oai-inspirehep.net-1830830
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2020
publisher SISSA
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spelling oai-inspirehep.net-18308302022-01-14T14:54:39Zdoi:10.22323/1.364.0199http://cds.cern.ch/record/2765917engMajor, PeterStudies of the factorisation of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMSDetectors and Experimental TechniquesParticle Physics - ExperimentThe factorisability of the transverse proton density functions in $x$ and $y$ is assumed in the analysis of single-plane van der Meer (vdM) scans for absolute luminosity calibration. A correction to the calibration constants for nonfactorisation effects in the proton density is then determined. The precision of the evaluation of this correction is one of the dominant sources of systematic uncertainty for the Run 2 (2015-2018) luminosity measurement in CMS. The vdM calibration technique and the methods used to estimate the bias due to the factorisation assumption are discussed.SISSAoai:inspirehep.net:18308302020
spellingShingle Detectors and Experimental Techniques
Particle Physics - Experiment
Major, Peter
Studies of the factorisation of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMS
title Studies of the factorisation of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMS
title_full Studies of the factorisation of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMS
title_fullStr Studies of the factorisation of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMS
title_full_unstemmed Studies of the factorisation of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMS
title_short Studies of the factorisation of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMS
title_sort studies of the factorisation of proton densities in van der meer scans and its impact on precision luminosity measurements for cms
topic Detectors and Experimental Techniques
Particle Physics - Experiment
url https://dx.doi.org/10.22323/1.364.0199
http://cds.cern.ch/record/2765917
work_keys_str_mv AT majorpeter studiesofthefactorisationofprotondensitiesinvandermeerscansanditsimpactonprecisionluminositymeasurementsforcms

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