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Luminosity Calibration

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General information about luminosity calibration at the LHC

Present contact persons:

Helmut BURKHARDT for the LBS study group
Witold KOZANECKI / Anne DABROWSKI (/ David STICKLAND) for the LHC Luminosity Monitoring & Calibration Working Group (LLCMWG)
Jamie Boyd & Christoph Schwick for LPC
Martino GAGLIARDI for ALICE
Witold KOZANECKI for ATLAS
Anne DABROWSKI / David STICKLAND for CMS
Massimiliano FERRO-LUZZI for LHCb
Kazuya TAKI for LHCf
Mario DEILE for TOTEM

Luminosity calibration measurements:

December 2011 VdM scans (PbPb 3.5 Z TeV/beam , 1m): see here.

October 2011 VdM scans (pp  3.5 TeV/beam , 90/10/90/10 m): see here.

June 2011 VdM scans (pp 3.5 TeV/beam , 1.5/10/1.5/3 m): see here.

May 2011 VdM scans (pp  3.5 TeV/beam, 1.5/10/1.5/3 m): see here.

March 2011 VdM scans (pp  1.38 TeV/beam, 10m/11m): see here.

November 2010 Vdm scans (PbPb  3.5 Z TeV/beam , 3.5m): see here.

October 2010 VdM scans  (pp  3.5 TeV/beam , 3.5m): see here.

Apr-May 2010 VdM scans (pp  3.5 TeV/beam, 2m):   see here.

Corrected BCT data files provided by JJG on June 10 are on afs: /afs/cern.ch/user/l/lpc/w0/2010/measurements/LHC/LHC-BCT-2010-05, should be replaced by set of files from the detailed analysis results.

Reference link to the discontinued Bunch Current Normalisation Working Group

Literature references:

Concept of luminosity, methods/proposals/historical/reviews:

  1. "Calibration of the effective beam height in the ISR" , S. van der Meer, ISR-PO/68-31, 1968 (CERN). link

  2. "Measurement of the luminosity of the p-pbar collider with a (generalized) Van der Meer method", C. Rubbia, CERN p-pbar note 38. link

  3. C. Moller, K. Dan. Vidensk. Selsk., Mat. Fys. Medd. 23, 1 (1945).

  4. "The luminosity for beam distributions with error and wakefield effects in linear colliders", O. Napoly, Part. Acc. 40 (1993) 180.

  5. "Concept of Luminosity", W. Herr and B. Muratori, in CAS - CERN Accelerator School: Intermediate Course on Accelerator Physics, Zeuthen, Germany, 15 - 26 Sep 2003, pp.361-378. link

  6. "Proposal for an absolute luminosity determination in colliding beam experiments using vertex detection of beam-gas interactions" , MFL, Nucl. Instrum. Methods Phys. Res., A 553 , 3 (2005) 388-399. link

  7. "Absolute Luminosity from Machine Parameters", H. Burkhardt, P. Grafstrom, LHC-PROJECT-Report-1019 ; CERN-LHC-PROJECT-Report-1019; link

  8. "Notes on van der Meer scan for Absolute Luminosity Measurement", V. Balagura, Nucl. Instrum. Methods Phys. Res., A 654 (2011) 634-638. Also in arXiv:1103.1129v1. link

  9. "Determination of the Absolute Luminosity at the LHC", S. M. White, CERN-THESIS-2010-139 ;LAL-10-154. link

Indirect methods: Optical theorem, electromagnetic processes, weak boson production

  1. "Towards a precise parton luminosity determination at the CERN LHC", M. Dittmar et al., PRD 56, 7284 (1997). link

  2. "Forward physics and luminosity determination at LHC", Proc. Workshop, Helsinki, Finland, October 31-November 4, 2000, K. Huitu, (ed.), R. Orava, (ed.), S. Tapprogge, (ed.), (Helsinki Inst. of Phys. & Helsinki U.) , V. Khoze, (ed.), (Durham U.) 2001. 226pp.  Prepared for 1st Workshop on Forward Physics and Luminosity Determination at LHC, Helsinki, Finland, 31 Oct - 4 Nov 2000.  Published in New Jersey, USA: World Scientific (2001) 226 p. link

  3. "Luminosity at the LHC", V.A. Khoze, A.D. Martin, R. Orava and M.G. Ryskin, Eur. Phys. J. C 19, 313 (2001) [arXiv:hep-ph/0010163]. link

  4. "Normalizing weak boson pair production at the Large Hadron Collider", J.M. Campbell et al., PRD 80, 054023 (2009) , link

Recent results from other accelerators:

  1. "Vernier scan results from the first RHIC proton run at 250 GeV", K.A. Drees, S.M. White, Proc. of IPAC'10, Kyoto, Japan. link

  2. "Luminosity scans at HERA", G.H. Hoffstaetter, Proc. of EPAC 2002, Paris, France. link

  3. "Interaction-Point Phase-Space Characterization using Single-Beam and Luminous-Region Measurements at PEP-II",W. Kozanecki et al., Nucl. Instrum. Methods Phys. Res., A 607 (2009) 293. link

Recent results from LHC:

  1. "Absolute luminosity measurements with the LHCb detector at the LHC", LHCb Collaboration, 2012 JINST 7 P01010 doi:10.1088/1748-0221/7/01/P01010. link arXiv.

  2. "Absolute Calibration of Luminosity Measurement at CMS: Summer 2011 Update", CMS Collaboration, CMS-PAS-EWK-11-001, link

  3. "Upper Limits on the Charge in Satellite Bunches for the October 2010 LHC Luminosity Calibration",  ATLAS Collaboration, ATLAS-CONF-2011-049. link

  4. "Updated Luminosity Determination in pp Collisions at root(s)=7 TeV using the ATLAS Detector", ATLAS Collaboration, ATLAS-CONF-2011-011. link

  5. "LHC Lumi Days: LHC Workshop on LHC Luminosity Calibration", CERN-Proceedings-2011-001. link

  6. "First Luminosity Scans in the LHC", S.M. White et al., Proc. IPAC'10. link

  7. "Determination of the luminosity at the LHC experiments", M. Ferro-Luzzi, Proc. ICHEP 2010. link

  8. "Optimisation of LHC beam conditions,", H. Burkhardt, Proc. ICHEP 2010. link

  9. "Measurement of CMS Luminosity", The CMS Collaboration, CMS Physics Analysis Summary, EWK-10-004. link

  10. "Luminosity Determination Using the ATLAS Detector", ATLAS Collaboration, ATLAS-CONF-2010-060. link

  11. "Luminosity measurement at LHCb", V. Balagura, Moriond QCD and High Energy Interactions, March 13-20, 2010. link

  12. "Prompt K0S production in pp collisions at sqrt(s)=0.9~TeV", the LHCb Collaboration, R. Aaij et al, Phys. Lett. B 693 (2010) 69-80. link

  13. "Measurement of pp=>bbX at sqrt(s)=7 TeV in the forward region", the LHCb Collaboration, R. Aaij et al, Phys. Lett. B 694 (2010) 209. link

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