期刊
JOURNAL OF INSTRUMENTATION
卷 9, 期 -, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1748-0221/9/12/P12005
关键词
Pattern recognition, cluster finding, calibration and fitting methods; Instrumentation for particle accelerators and storage rings - high energy (linear accelerators, synchrotrons)
资金
- CERN
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- NSFC (China)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- MPG (Germany)
- SFI (Ireland)
- INFN (Italy)
- FOM (The Netherlands)
- NWO (The Netherlands)
- MNiSW (Poland)
- NCN (Poland)
- MEN/IFA (Romania)
- MinES (Russia)
- FANO (Russia)
- MinECo (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NASU (Ukraine)
- STFC (United Kingdom)
- NSF (USA)
- IN2P3 (France)
- KIT (Germany)
- SURF (The Netherlands)
- PIC (Spain)
- GridPP (United Kingdom)
- EPLANET (European Union)
- Marie Sklodowska-Curie Actions (European Union)
- ERC (European Union)
- Conseil general de Haute-Savoie (France)
- Labex ENIGMASS (France)
- OCEVU (France)
- Region Auvergne (France)
- RFBR (Russia)
- XuntaGal (Spain)
- GENCAT (Spain)
- Royal Society (United Kingdom)
- Royal Commission for the Exhibition of 1851 (United Kingdom)
- STFC [ST/H001085/2, ST/K000705/1, ST/J500641/1, ST/L003538/1, ST/K00140X/1, ST/J50094X/1, ST/J005495/1, PP/E003095/1, ST/K001302/1, ST/K003534/1, ST/L00352X/1, ST/L006146/1, ST/M000761/1, ST/I000097/1, ST/L003112/1, LHCb, ST/J004332/1, ST/K502236/1, ST/K003410/1, ST/K00137X/1, ST/H00100X/2, ST/H00100X/1, ST/L003392/1, ST/H006737/1, ST/L001195/1, ST/I003576/1, ST/J004855/1, PP/E000355/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/M000761/1, ST/L003112/1, ST/L00352X/1, ST/L001195/1, 1511824, 1096173, ST/M001474/1, ST/L003538/1, 1416165, ST/K001310/1 ATLAS, ST/K00137X/1, ST/K001418/1, ST/J005495/1, ST/H001085/2, ST/J50094X/1, ST/K00140X/1, ST/K001310/1 LHCb, ST/I003576/1, ST/H00100X/1, PP/E000355/1, PP/E003095/1, LHCb, 1208164, ST/K003534/1 GRIDPP, ST/K001310/1 ATLAS Upgrades, ST/L003392/1, GRIDPP, ST/J004332/1, ST/K001310/1, ST/K003534/1, 1225304, ST/J500641/1, ST/H00100X/2, ST/I000097/1, ST/K003410/1, 1364044, 1369397, ST/K001310/1 LHCb Upgrades, ST/H006737/1, ST/K000705/1, ST/K502236/1, ST/L006146/1, ST/K001256/1, 1299204, 1415632, ST/K001302/1, 1225314, ST/J004855/1] Funding Source: researchfish
- Division Of Physics
- Direct For Mathematical & Physical Scien [1205805] Funding Source: National Science Foundation
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.
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