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Precision luminosity measurements at LHCb

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Precision luminosity measurements at LHCb

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dc.contributor.author	LHCb Collaboration
dc.contributor.author	Martínez Vidal, Fernando
dc.contributor.author	Oyanguren Campos, Arantza
dc.contributor.author	Ruiz Valls, Pablo
dc.contributor.author	Sánchez Mayordomo, Carlos
dc.date.accessioned	2016-04-20T10:10:28Z
dc.date.available	2016-04-20T10:10:28Z
dc.date.issued	2014
dc.identifier.citation	LHCb Collaboration Martínez Vidal, Fernando Oyanguren Campos, Arantza Ruiz Valls, Pablo Sánchez Mayordomo, Carlos 2014 Precision luminosity measurements at LHCb Journal Of Instrumentation 9 P12005-1 P12005-91
dc.identifier.uri	http://hdl.handle.net/10550/52879
dc.description.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 ¿van der Meer scan¿ and ¿beam-gas imaging¿ 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.
dc.language.iso	eng
dc.relation.ispartof	Journal Of Instrumentation, 2014, vol. 9, p. P12005-1-P12005-91
dc.subject	Física nuclear
dc.title	Precision luminosity measurements at LHCb
dc.type	journal article	es_ES
dc.date.updated	2016-04-20T10:10:29Z
dc.identifier.doi	10.1088/1748-0221/9/12/P12005
dc.identifier.idgrec	101796
dc.rights.accessRights	open access	es_ES