This page collects all of the approved, public luminosity calibration plots for Run 1. For similar information for Run 2, please consult the Luminosity Preliminary Results page.
The following figures are from the respective PASes.
Beamspot centroid longitudinal position as a function of the beam separation during
a horizontal scan. April 2012 campaign. The strong correlation (as observed) is due to the finite crossing angle. Full size version of the plot:

Beamspot centroid longitudinal position as a function of the beam separation during
a horizontal scan. November 2012 campaign. Full size version of the plot:

Luminous region RMS in the vertical plane as a function of the beam separation during
a horizontal scan. April 2012 campaign. Nonfactorisable beam charge density distributions are expected to produce correlations as observed in this scan. Full size version of the plot:

Luminous region RMS in the vertical plane as a function of the beam separation during
a horizontal scan. November 2012 campaign. Full size version of the plot:

Overview of the November VdM scans. The horizontal axis of the sketch lists the conditions of the scan (the axis of the scan and the offset), while the size of the peaks indicates the relative size of the observed rate. Full size version of the plot:

Example of a rate profile fit. This specific case corresponds to BX 721 and scan pair number 0. Full size version of the plot:

Estimates for the visible crosssection for each BX and headon scan pair performed during fill 3316. The first four scans (two scan pairs) occurred consecutively within 1h, the last scan pair took place 2h later. Full size version of the plot:

Length scale calibration. The relation between the measured center of the luminous region and the nominal crossing position for the horizontal scanning plane and both calibration fills. The two different markers/colors correspond to the two sets of scan points with opposite directions of approach. Full size version of the plot:

Length scale calibration. The relation between the measured center of the luminous region and the nominal crossing position for the vertical scanning plane and both calibration fills. The two different markers/colors correspond to the two sets of scan points with opposite directions of approach. Full size version of the plot:

Time dependency of the luminosity (black) and the beam currents product (red). Full size version of the plot:

Time evolution of the rate profile widths for each BX considered in the analysis. Solid (empty) crosses stands for horizontal (vertical) scans. Full size version of the plot:

Orbit drift. Difference of the estimated beams orbits at the CMS IP in the horizontal (solid crosses) and vertical (empty crosses). Full size version of the plot:

Beambeam deflection. Analytic estimation of the beam beam deflection as a function of the beam separation for parameters typical of fill 3316. Full size version of the plot:

Pull  HF vs pixels. Distribution of the difference between of the rate profile widths as measured by the cluster counting method and by the HF divided by the statistical uncertainty. Full size version of the plot:

Pixel clusters  relative contribution. Relative contributions of different pixel detector regions to the total cluster count as a function of the run number for the 2012 physics runs. Full size version of the plot:

Pixel clusters relative contribution vs Pileup. Pileup (upper plot) and relative contributions of different pixel detector regions (down) as a function of time during fill 3236. The drop in luminosity around 10h after the beginning is due to an endoffill VdM scan. Full size version of the plot:

Pixel cluster efficiency. Pixel cluster efficiency drop for various detector components as a function of the instantaneous luminosity. Full size version of the plot:

Pixel cluster efficiency. Pixel cluster efficiency drop for various detector components as a function of the L1 trigger rate. Full size version of the plot:

Beam spot position. Distribution of the beamspot in the longitudinal direction for the 2012 LHC run. Full size version of the plot:

Cluster multiplicity vs vertex position. Expected number of hits as a function of the longitudinal position of the generated interaction vertex. Full size version of the plot:

The relation between the observed center of the luminous region and the nominal
position. The figure represents the horizontal scanning plane. The two different markers/colors correspond to the two sets of scan points with opposite directions of approach. Full size version of the plot:

The relation between the observed center of the luminous region and the nominal
position. The figure represents the vertical scanning plane. The two different markers/colors correspond to the two sets of scan points with opposite directions of approach. Full size version of the plot:

Beam shape fits for the first Van der Meer scan (beam crossing 721) in LHC Fill 2520. Number of pixel clusters as a rate variable, Xplane scan. Full size version of the plot:

Beam shape fits for the first Van der Meer scan (beam crossing 721) in LHC Fill 2520. Number of pixel clusters as a rate variable, Yplane scan. Full size version of the plot:

Beam shape fits for the first Van der Meer scan (beam crossing 721) in LHC Fill 2520. Number of vertices as a rate variable, Xplane scan. Full size version of the plot:

Beam shape fits for the first Van der Meer scan (beam crossing 721) in LHC Fill 2520. Number of vertices as a rate variable, Yplane scan. Full size version of the plot:

The evolution of the observed pixel cluster cross section as a function of the scan pair. There is a clear, so far not understood, upward trend. Awaiting further understanding this trend is taken into account as a systematic uncertainty. Full size version of the plot:

Comparison between visible cross sections obtained during the Van der Meer scans. The figure represents the ratio between pixel cluster counting and HF zerocounting. Ratio scaled to average to unity. Full size version of the plot:

Comparison between visible cross sections obtained during the Van der Meer scans. The figure represents the ratio between vertex counting and HF zerocounting. Ratio scaled to average to unity. Full size version of the plot:

Comparison between visible cross sections obtained during the Van der Meer scans. The figure represents the ratio between BCM1F zerocounting and HF zerocounting. Ratio scaled to average to unity. Full size version of the plot:

Results of the pixel afterglow ‘deconvolution fit’. The main difference with respect to 2011 lies in the ‘BX+1’ ghost response parameter a1. This effect is due to the minimum cluster size and charge cuts and does not affect the afterglow correction values. Linear scale version of the figure. Full size version of the plot:

Results of the pixel afterglow ‘deconvolution fit’. The main difference with respect to 2011 lies in the ‘BX+1’ ghost response parameter a1. This effect is due to the minimum cluster size and charge cuts and does not affect the afterglow correction values. Logarithmic scale version of the figure. Full size version of the plot:

Relative contributions of different pixel detector regions to the total cluster count. The shaded band indicates a \pm 1.5% window of stability for the contribution of the barrel to the overall cluster count. (The total barrel contribution is > 70%.) Full size version of the plot:

Relative contributions of different pixel detector regions to the total cluster count. The figure represents result sfor the forward pixel detector region. Full size version of the plot:

Representative results from the May 2011 VdM scans Scan in the x plane for beam crossing 2752 using the mean number of pixels per zerobias trigger as the rate variable. Lengthscale corrections have not been applied. Full size versions of the plot:

Representative results from the May 2011 VdM scans Scan in the y plane for beam crossing 2752 using the mean number of pixels per zerobias trigger as the rate variable. Lengthscale corrections have not been applied. Full size versions of the plot:

Representative results from the May 2011 VdM scans Scan in the x plane for beam crossing 2752 using the mean number of vertices per zerobias trigger as the rate variable. Lengthscale corrections have not been applied. Full size versions of the plot:

Representative results from the May 2011 VdM scans Scan in the y plane for beam crossing 2752 using the mean number of vertices per zerobias trigger as the rate variable. Lengthscale corrections have not been applied. Full size versions of the plot:

Cross section for vertex production plotted as a function of instantaneous singlebunch
luminosity The cross section measurement is based on the online calibration for the luminosity measurement. Full size versions of the plot:

Response of the HF online system to a single bunch with luminosity in BX0 The plot has been normalized such that the value in BX0 is one. Full size versions of the plot:

VdM scans using the HF Online method The figure represents the LHC Fill 1753 (May 2011) X scan. Lengthscale corrections have not been applied. Full size versions of the plot:

VdM scans using the HF Online method The figure represents the LHC Fill 1753 (May 2011) Y scan. Lengthscale corrections have not been applied. Full size versions of the plot:

VdM scans using the HF Online method The figure represents the LHC Fill 1875 (June 2011) X scan. Lengthscale corrections have not been applied. Full size versions of the plot:

VdM scans using the HF Online method The figure represents the LHC Fill 1875 (June 2011) Y scan. Lengthscale corrections have not been applied. Full size versions of the plot:

VdM scans using the offline simplevertexcounting method The figure represents the LHC Fill 1753 (May 2011) X scan. Lengthscale corrections have not been applied. Full size versions of the plot:

VdM scans using the offline simplevertexcounting method The figure represents the LHC Fill 1753 (May 2011) Y scan. Lengthscale corrections have not been applied. Full size versions of the plot:

Calibration correction constants kx (left) and ky (right) for the 1041 bunches in the LHC Fill 1875 (June 2011) scans. Full size versions of the plot:

Relative luminosity versus bunch crossing Shown for LHC Fill 1089. The instantaneous luminosity during this fill was approximately 2 × 10^{28} cm^{−2} s^{−1}. Beams were colliding only in BX 1. BX’s 892 and 1786, which are not colliding bunches, are used to estimate the background levels for the various methods. Rates are shown for the HF online method as well as the two offline methods described below. In all cases, the luminosities were normalized to unity in BX 1, with the points for the HF online and offline methods displaced slightly so that all three points are visible. Full size versions of the plot:

Variables and cuts used on offline HF event selection
Full size versions of the plot:

Van der Meer scan results
The figure represents the LHC fill 1058 X scan. The blue curve is the total double Gaussian, the red curve is the core Gaussian (sig1), and the green curve is the Gaussian for the tails (sig2). Full size versions of the plot:

Van der Meer scan results
The figure represents the LHC fill 1058 Y scan. The blue curve is the total double Gaussian, the red curve is the core Gaussian (sig1), and the green curve is the Gaussian for the tails (sig2). Full size versions of the plot:

Van der Meer scan results
The figure represents the LHC fill 1089 X scan. The blue curve is the total double Gaussian, the red curve is the core Gaussian (sig1), and the green curve is the Gaussian for the tails (sig2). Full size versions of the plot:

Van der Meer scan results
The figure represents the LHC fill 1089 Y scan. The blue curve is the total double Gaussian, the red curve is the core Gaussian (sig1), and the green curve is the Gaussian for the tails (sig2). Full size versions of the plot:

Calibration relative to MC normalization
Shown at the five central zero points in the LHC Fill 1089. The different sets of points show the corrections as propagated from the four different pairs of measured x and y beam widths. The uncorrected points for the reverse x and forward y pair are also shown in black. Full size versions of the plot:

 StoyanStoynev  31Oct2012
I  Attachment  History  Action  Size  Date  Who  Comment 

png  2012_ratio_Feb25.png  r1  manage  56.0 K  20131217  14:48  StoyanStoynev  pixel cluster fractional contributions 
BXrates.pdf  r1  manage  25.9 K  20121102  10:34  StoyanStoynev  Relative rates (2010)  pdf version  
png  BXrates.png  r1  manage  9.0 K  20121102  10:33  StoyanStoynev  Relative rates (2010) 
png  CMSLogo.png  r1  manage  19.4 K  20121102  11:14  StoyanStoynev  CMS logo 
HFOfflineCuts.pdf  r1  manage  99.6 K  20121102  10:35  StoyanStoynev  Offline cuts (2010)  pdf version  
png  HFOfflineCuts.png  r1  manage  21.8 K  20121102  10:34  StoyanStoynev  Offline cuts (2010) 
HFOnFill1753XBX81.pdf  r1  manage  17.1 K  20121102  09:43  StoyanStoynev  VdM scan X May 2011  pdf version  
png  HFOnFill1753XBX81.png  r1  manage  14.3 K  20121102  09:42  StoyanStoynev  VdM scan X May 2011 
HFOnFill1753YBX81.pdf  r1  manage  17.0 K  20121102  09:44  StoyanStoynev  VdM scan Y May 2011  pdf version  
png  HFOnFill1753YBX81.png  r1  manage  14.6 K  20121102  09:44  StoyanStoynev  VdM scan Y May 2011 
HFOnFill1875XBX45.pdf  r1  manage  16.9 K  20121102  09:46  StoyanStoynev  VdM scan X June 2011  pdf version  
png  HFOnFill1875XBX45.png  r1  manage  14.0 K  20121102  09:45  StoyanStoynev  VdM scan X June 2011 
HFOnFill1875YBX45.pdf  r1  manage  16.8 K  20121102  09:48  StoyanStoynev  VdM scan Y June 2011  pdf version  
png  HFOnFill1875YBX45.png  r1  manage  14.5 K  20121102  09:47  StoyanStoynev  VdM scan Y June 2011 
png  NovScan_sketch.png  r1  manage  124.6 K  20131216  21:30  StoyanStoynev  VdM sketch (November 2012) 
png  SigmaVisComparison_scaledBCM1FoverHF.png  r1  manage  28.0 K  20121031  12:38  StoyanStoynev  ratio of visible cross sections  BCM1F over HF 
png  SigmaVisComparison_scaledPixoverHF.png  r1  manage  28.3 K  20121031  12:37  StoyanStoynev  ratio of visible cross sections  pixel over HF 
png  SigmaVisComparison_scaledVtxoverHF.png  r1  manage  28.3 K  20121031  12:38  StoyanStoynev  ratio of visible cross sections  vertex over HF 
png  SingleBunchAfterglow.png  r1  manage  14.8 K  20121102  09:40  StoyanStoynev  HF response (2011) 
VertexCrossSectionFromCounting.pdf  r1  manage  14.2 K  20121102  09:39  StoyanStoynev  Vertex crosssection (2011)  pdf version  
png  VertexCrossSectionFromCounting.png  r1  manage  6.8 K  20121102  09:39  StoyanStoynev  Vertex crosssection (2011) 
VertexOffFill1753XBX817.pdf  r1  manage  17.0 K  20121102  09:49  StoyanStoynev  VdM scan X May 2011 (vertex)  pdf version  
png  VertexOffFill1753XBX817.png  r1  manage  15.5 K  20121102  09:49  StoyanStoynev  VdM scan X May 2011 (vertex) 
VertexOffFill1753YBX817.pdf  r1  manage  16.9 K  20121102  09:51  StoyanStoynev  VdM scan Y May 2011 (vertex)  pdf version  
png  VertexOffFill1753YBX817.png  r1  manage  13.9 K  20121102  09:50  StoyanStoynev  VdM scan Y May 2011 (vertex) 
png  bb_example.png  r1  manage  32.0 K  20131217  14:40  StoyanStoynev  beambeam deflection 
png  bs_Z_jitter.png  r1  manage  5.8 K  20131217  15:01  StoyanStoynev  beamspot Z jitter 
png  graph_pixel_model2b_scanpair0_bx721.png  r1  manage  236.2 K  20131216  21:34  StoyanStoynev  rate profile 
png  graph_pixel_scan0_x_bx721.png  r1  manage  160.1 K  20121102  11:42  StoyanStoynev  VdM scan X 2012, Fill 2520, BX 721, pixel 
png  graph_pixel_scan1_y_bx721.png  r1  manage  178.9 K  20121031  12:32  StoyanStoynev  VdM scan Y 2012, Fill 2520, BX 721, pixel 
graph_scan0_x_bx2752_all.pdf  r1  manage  239.0 K  20121031  11:11  StoyanStoynev  VdM scan X 2011 (pixel)  pdf version  
png  graph_scan0_x_bx2752_all.png  r1  manage  18.1 K  20121031  11:10  StoyanStoynev  VdM scan X 2011 (pixel) 
graph_scan1_y_bx2752_all.pdf  r1  manage  238.9 K  20121031  11:34  StoyanStoynev  VdM scan Y 2011 (pixel)  pdf version  
png  graph_scan1_y_bx2752_all.png  r1  manage  18.2 K  20121031  11:33  StoyanStoynev  VdM scan Y 2011 (pixel) 
png  graph_vertex_scan0_x_bx721.png  r1  manage  161.7 K  20121031  12:33  StoyanStoynev  VdM scan X 2012, Fill 2520, BX 721, vertex 
png  graph_vertex_scan1_y_bx721.png  r1  manage  171.4 K  20121031  12:33  StoyanStoynev  VdM scan Y 2012, Fill 2520, BX 721, vertex 
kValuesJuneScan.pdf  r1  manage  14.5 K  20121102  09:52  StoyanStoynev  Callibration correction constants (June 2011)  pdf version  
png  kValuesJuneScan.png  r1  manage  6.1 K  20121102  09:51  StoyanStoynev  Callibration correction constants (June 2011) 
png  lumiN2slopes.png  r1  manage  10.0 K  20131216  22:08  StoyanStoynev  lumi and beam current slopes 
png  lumi_mult_vs_vtxpos.png  r1  manage  16.2 K  20131217  15:04  StoyanStoynev  cluster multiplicity vs vertex position 
png  mean_z_scanPlanex_Apr_new.png  r1  manage  15.1 K  20131215  18:16  StoyanStoynev  Beamspot centroid (April 2012) 
png  mean_z_scanPlanex_Nov_new.png  r1  manage  19.7 K  20131215  18:21  StoyanStoynev  Beamspot centroid (November 2012) 
png  orbitDrift.png  r1  manage  21.3 K  20131217  14:36  StoyanStoynev  orbit drift 
png  pixel_afterglow_fill2580_fit_lin.png  r1  manage  226.5 K  20121031  12:40  StoyanStoynev  Cluster count  linear 
png  pixel_afterglow_fill2580_fit_log.png  r1  manage  250.0 K  20121031  12:41  StoyanStoynev  Cluster count  liogarithmic 
png  pixel_efficiency3.png  r1  manage  106.4 K  20131217  14:57  StoyanStoynev  pixel cluster efficiecny vs ins. lumi 
png  pixel_efficiency4.png  r1  manage  112.9 K  20131217  14:57  StoyanStoynev  pixel cluster efficiecny vs L1 trigger rate 
png  pixel_frac_barrel.png  r1  manage  90.1 K  20121031  12:42  StoyanStoynev  Relative pixel detector region contributions  barrel 
png  pixel_frac_forward.png  r1  manage  120.3 K  20121031  12:43  StoyanStoynev  Relative pixel detector region contributions  forward 
png  pull_HF_vs_pixels.png  r1  manage  13.9 K  20131217  14:44  StoyanStoynev  pull HF vs pixels 
png  ratio_pileup.png  r1  manage  11.8 K  20131217  14:54  StoyanStoynev  pile up and pixel cluster relative contributions 
png  rms_y_scanPlanex_Apr_new.png  r1  manage  20.8 K  20131216  21:19  StoyanStoynev  Lumi region RMS, Y (April 2012) 
png  rms_y_scanPlanex_Nov_new.png  r1  manage  24.4 K  20131216  21:19  StoyanStoynev  Lumi region RMS, Y (November 2012) 
png  sigmavis.png  r1  manage  11.3 K  20131216  21:37  StoyanStoynev  visible crosssection (fill 3316) 
png  vdm_evolution_xsec_pixel.png  r1  manage  129.8 K  20121031  12:34  StoyanStoynev  Evolution of the pixel cluster crosssection 
vertexVDMxFitScan1.pdf  r1  manage  17.0 K  20121031  11:35  StoyanStoynev  VdM scan X 2011 (vertex)  pdf version  
png  vertexVDMxFitScan1.png  r1  manage  13.8 K  20121031  11:34  StoyanStoynev  VdM scan X 2011 (vertex) 
vertexVDMyFitScan1.pdf  r1  manage  16.9 K  20121031  11:35  StoyanStoynev  VdM scan Y 2011 (vertex)  pdf version  
png  vertexVDMyFitScan1.png  r1  manage  13.7 K  20121031  11:35  StoyanStoynev  VdM scan Y 2011 (vertex) 
png  vtx_x_ls_scan_plane_x.png  r3 r2 r1  manage  151.3 K  20131217  14:21  StoyanStoynev  length scale calibration (X) 
png  vtx_x_ls_scan_plane_x_NEW.png  r1  manage  163.8 K  20131216  21:53  StoyanStoynev  new length scale calibration (X) 
png  vtx_y_ls_scan_plane_y.png  r3 r2 r1  manage  140.7 K  20131217  14:21  StoyanStoynev  length scale calibration (Y) 
png  vtx_y_ls_scan_plane_y_NEW.png  r1  manage  168.2 K  20131216  21:53  StoyanStoynev  new length scale calibration (Y) 
png  width_perBX.png  r1  manage  12.7 K  20131216  22:08  StoyanStoynev  rate profile width vs time 
xscan2010PASfill1058.pdf  r1  manage  56.5 K  20121102  10:37  StoyanStoynev  VdM scan X 2010  pdf version  
png  xscan2010PASfill1058.png  r1  manage  26.2 K  20121102  10:36  StoyanStoynev  VdM scan X 2010 
xScan_1089_log.pdf  r1  manage  47.6 K  20121102  10:41  StoyanStoynev  VdM scan X 2010 (fill 1089, log)  pdf version  
png  xScan_1089_log.png  r1  manage  13.1 K  20121102  10:41  StoyanStoynev  VdM scan X 2010 (fill 1089, log) 
yscan2010PASfill1058.pdf  r1  manage  56.9 K  20121102  10:38  StoyanStoynev  VdM scan Y 2010  pdf version  
png  yscan2010PASfill1058.png  r1  manage  27.9 K  20121102  10:38  StoyanStoynev  VdM scan Y 2010 
yScan_1089_log.pdf  r1  manage  47.6 K  20121102  10:43  StoyanStoynev  VdM scan Y 2010 (fill 1089, log)  pdf version  
png  yScan_1089_log.png  r1  manage  13.1 K  20121102  10:42  StoyanStoynev  VdM scan Y 2010 (fill 1089, log) 
zeropointscalibscan2010PASemitcorrectedfill1089.pdf  r1  manage  14.3 K  20121102  10:45  StoyanStoynev  Calibration relative to MC (2010)  pdf version  
png  zeropointscalibscan2010PASemitcorrectedfill1089.png  r1  manage  19.4 K  20121102  10:44  StoyanStoynev  Calibration relative to MC (2010) 