Publikation: Zeitschriftenartikel

Precision luminosity measurements at LHCb

Grunddaten
Abstract
Autoren
Einrichtung

Grunddaten

Titel	Precision luminosity measurements at LHCb
Veröffentlicht in	Journal of Instrumentation. - London : Inst. of Physics
Erscheinungsjahr	2014
Seiten (von – bis)	12005-1 – 12005-89
Band	9
Jahr	2014
Publikationsform	Elektronische Ressource
Publikationsart	Zeitschriftenartikel
Sprache	Englisch
DOI	10.1088/1748-0221/9/12/P12005
Letzte Änderung	14.01.2016 15:11:53
Bearbeitungsstatus	durch UB Rostock abschließend validiert
Dauerhafte URL	http://purl.uni-rostock.de/fodb/pub/46734
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Abstract

Measuring cross-sections at the LHC requires the luminosity to be determined accurately at each centre-of-mass energy s. In this paper results are reported from the luminosity calibrations carried out at the LHC interaction point 8 with the LHCb detector for s = 2.76, 7 and 8 TeV (proton-proton collisions) and for sNN = 5 TeV (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 s = 8 TeV 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.

Autoren

Aaij, Roel
Adeva, B.
Adinolfi, M.
Bachmann, Sebastian
Bien, Alexander
Comerma-Montells, Albert
De Cian, Michel
Dordei, Francesca
Esen, Sevda
Färber, Christian
Gersabeck, Evelina
Grillo, Lucia
Grünberg, Oliver
Han, Xiaoxue
Hansmann-Menzemer, Stephanie
Jäger, Andreas
Kolpin, Michael
Kreplin, Katharina
Krocker, Georg Alexander
Leverington, Blake
Marks, Jörg
Meißner, Marco
Neuner, Max
Nikodem, Thomas
Seyfert, Paul
Stahl, Marian
Stahl, Sascha
Uwer, Ulrich
Vesterinen, Mika
Wandernoth, Sebastian
Wiedner, Dirk
Zhelezov, Alexey

Einrichtung

MNF/Institut für Physik (IfPH)