Charged particle multiplicity in HI collisions at 2.76 TeV
Introduction
This page describes the histograms approved to show in the 2011 Quark Matter Conference for charged particle multiplicity measurement at 2.76
TeV.
vs for all layer-0 and layer-1 pixel clusters pairs
vs for all layer-0 and layer-1 pixel cluster pairs for Minbias events. and are defined as layer-0 cluster or minus layer-1 cluster or correspondingly. The black line shows the selection criteria for selecting tracklets candidates at . Cluster pairs within the black line are selected as tracklet candidates. The dependent selection criteria is denoted by this formula: .
|

APPROVED
eps file
|
Occupancy variable used to match MC to data (|η|<1)
Distribution of occupancy variable for data. This variable is used to match data and MC. This variable divides events into 20 different occupant categories.
|

APPROVED
eps file
|
Comparison of data and Monte Carlo with tracklets and distributions
Distribution of tracklets (left) and (right) from data (black line) and MC (yellow shaded) with tracklets from two range: (top) and (bottom) for the 0-10 centrality events. A pT re-weighting procedure was applied to MC samples.
|

APPROVED
eps file
|
Distribution of tracklets from data and MC
Distribution of tracklets from data and MC for the 0-10 centrality events. Top: data (black) and MC (yellow) overlay together. Bottom: Ratio of MC to data. A pT re-weighting procedure was applied to MC samples.
|

APPROVED
eps file
|
Distribution of tracklets from data and MC
Distribution of tracklets from data and MC for the 0-10 centrality events. Top: data (black) and MC (yellow) overlay together. Bottom: Ratio of MC to data. A pT re-weighting procedure was applied to MC samples.
|

APPROVED
eps file
|
Distribution of pixel tracks from data and MC
Distribution of pixel tracks from data and MC for the 0-10 centrality events. Top: data (black) and MC (yellow) overlay together. Bottom: Ratio of MC to data. A pT re-weighting procedure was applied to MC samples.
|

APPROVED
eps file
|
Distribution of pixel tracks from data and MC
Distribution of pixel tracks from data and MC for the 0-10 centrality events. Top: data (black) and MC (yellow) overlay together. Bottom: Ratio of MC to data. A pT re-weighting procedure was applied to MC samples.
|

APPROVED
eps file
|
Number of tracklets from Method 2 vs FCal ET (1<|η|<2)
Number of tracklets from method 2 in normalized by coverage
vs the forward calorimeter
transverse energy distribution. The red points are from signal events, the black points
are from flipped events, and the blue points are signal events subtracted by flipped
events.
|

APPROVED
eps file
|
Raw tracklets distribution from Method 1
Raw two-point tracklet distribution in 2.76 TeV Pb+Pb collisions from Method 1 for 8 different centrality selections.
|

APPROVED
eps file
|
Distribution of vs 
Distribution of vs . The error bar on each point
shows the combined statistical and systematic uncertainty
from the measurement, the shaded band shows the total
statisical and systematic uncertainty including the uncertainties on .
|

APPROVED
eps file
|
Charged particle multiplicity collision energy dependence and dependence
Top: Collision energy dependence of per
colliding nucleon pair, /2, from a variety of measurements in
proton-proton and central nuclear nucelar collisions
including the 0-6\% reported
here for and the previous 0-5 ALICE measurement
(point shifted
horizontally for clarity). The curves show different expectations for
the collision energy dependence of in nuclear nuclear collisions:
dotted - results of a Landau hydrodynamics calculation
, dashed - a extrapolation of RHIC and SPS data proposed by
ALICE,
dot-dashed - a logarithmic extrapolation of RHIC and SPS data.
Bottom: evaluated over
vs for 2 centrality intervals over 0-20 and 5 centrality
intervals over 20-80 . Error bars represent combined statistical and
systematic uncertainties on the \dndetamid\ measurement, the shaded band
represents the total systematic uncertainty including
uncertainties. The RHIC measurements have been multiplied by
2.15 to allow comparison with the = 2.76 TeV results.
}
|

APPROVED
eps file
|
Distribution of vs 
Distribution of vs $N_{part}$ from ATLAS (circle points).
The error bar on each point
shows the combined statistical and systematic uncertainty
from the measurement, the shaded band shows the total
statisical and systematic uncertainty including the uncertainties on .
Also shown in the figure are measurement from ALICE (star points),
RHIC results averaged over four experiments (square),
and PHOBOS results (triangle). RHIC and PHOBOS results are scaled up
by a factor of 2.15 to match central ATLAS data.
|

APPROVED
eps file
|
Distribution of vs compared with CGC calculation
Distribution of vs from ATLAS (circle points) for 0-6
centrality interval. Shaded band shows the combined systematic and statistical uncertainties.
Also shown is the prediction from CGC calculation [arXiv:1011.3591v1 [hep-ph]] for 0-5 (line).
|

APPROVED
eps file
|
vs distribution
Left: Top: raw track/tracklet
$1/\Nevt dN_{\mathrm{trkl}}/d\eta$ distribution from tracklet Method 1 (
points), tracklet Method 2 (squares) and pixel tracking (blue
triangles) for 0-10 centrality events. Middle:
corrected tracklet and track distributions (same symbol scheme),
bottom: ratio of from
the tracklet Method 2 (squares) and pixel tracking (
triangles) to tracklet Method 1 respectively. Right: Final
distributions from tracklet Method 1 for eight 10 centrality intervals.
Total systematic errors on $1/\Nevt dN_{\mathrm{ch}}/d\eta$ are shown as a shaded band.
|

APPROVED
eps file
|
vs 
Left: measured by ATLAS at TeV
compared to similar measurements over by PHOBOS at RHIC for 19.6 and 200 GeV.
Right: The same data as in the other figure, but with the PHOBOS data shifted such that one of the
projectiles has the LHC Pb+Pb per-nucleon beam rapidity.
|

APPROVED
eps file
|
vs from three different methods
Distributions of measured by three different methods:
Pixel tracking (trigangle), tracklet Method 1(point)
and tracklet Method 2(square). Low panel shows the ratio
of pixel tracking and Method2 to Method 1 ratio. This shows for 0-10\%
centrality interval.
|

APPROVED
eps file
|
vs from three different methods
Distributions of measured by three different methods:
Pixel tracking (trigangle), tracklet Method 1(point)
and tracklet Method 2(square). Low panel shows the ratio
of pixel tracking and Method2 to Method 1 ratio. This shows for 10-20\%
centrality interval.
|

APPROVED
eps file
|
vs from three different methods
Distributions of measured by three different methods:
Pixel tracking (trigangle), tracklet Method 1(point)
and tracklet Method 2(square). Low panel shows the ratio
of pixel tracking and Method2 to Method 1 ratio. This shows for 20-30\%
centrality interval.
|

APPROVED
eps file
|
vs from three different methods
Distributions of measured by three different methods:
Pixel tracking (trigangle), tracklet Method 1(point)
and tracklet Method 2(square). Low panel shows the ratio
of pixel tracking and Method2 to Method 1 ratio. This shows for 30-40\%
centrality interval.
|

APPROVED
eps file
|
vs from three different methods
Distributions of measured by three different methods:
Pixel tracking (trigangle), tracklet Method 1(point)
and tracklet Method 2(square). Low panel shows the ratio
of pixel tracking and Method2 to Method 1 ratio. This shows for 40-50\%
centrality interval.
|

APPROVED
eps file
|
vs from three different methods
Distributions of measured by three different methods:
Pixel tracking (trigangle), tracklet Method 1(point)
and tracklet Method 2(square). Low panel shows the ratio
of pixel tracking and Method2 to Method 1 ratio. This shows for 50-60\%
centrality interval.
|

APPROVED
eps file
|
vs from three different methods
Distributions of measured by three different methods:
Pixel tracking (trigangle), tracklet Method 1(point)
and tracklet Method 2(square). Low panel shows the ratio
of pixel tracking and Method2 to Method 1 ratio. This shows for 60-70\%
centrality interval.
|

APPROVED
eps file
|
vs from three different methods
Distributions of measured by three different methods:
Pixel tracking (trigangle), tracklet Method 1(point)
and tracklet Method 2(square). Low panel shows the ratio
of pixel tracking and Method2 to Method 1 ratio. This shows for 70-80\%
centrality interval.
|

APPROVED
eps file
|
Major updates:
-- Main.YujiaoChen - 15-Jun-2011
Responsible: Main.YujiaoChen
Subject: public
Topic attachments
I |
Attachment |
History |
Action |
Size |
Date |
Who |
Comment |
png |
a-0.png |
r1 |
manage |
42.3 K |
2011-06-15 - 19:19 |
YujiaoChen |
d0 |
png |
a-1.png |
r1 |
manage |
40.4 K |
2011-06-15 - 19:20 |
YujiaoChen |
delta eta |
png |
a-10.png |
r1 |
manage |
41.8 K |
2011-06-15 - 19:25 |
YujiaoChen |
Delta phi |
png |
a-11.png |
r1 |
manage |
55.7 K |
2011-06-15 - 19:26 |
YujiaoChen |
dndeta, 3 methods, cent 1 |
png |
a-12.png |
r1 |
manage |
52.4 K |
2011-06-15 - 19:26 |
YujiaoChen |
dndeta, 3 methods, cent 2 |
png |
a-13.png |
r1 |
manage |
54.6 K |
2011-06-15 - 21:24 |
YujiaoChen |
|
png |
a-14.png |
r1 |
manage |
51.6 K |
2011-06-15 - 19:27 |
YujiaoChen |
dndeta, 3 methods, cent 3 |
png |
a-15.png |
r1 |
manage |
55.4 K |
2011-06-15 - 19:27 |
YujiaoChen |
dndeta, 3 methods, cent 4 |
png |
a-16.png |
r1 |
manage |
57.0 K |
2011-06-15 - 19:28 |
YujiaoChen |
dndeta, 3 methods, cent 5 |
png |
a-17.png |
r1 |
manage |
54.0 K |
2011-06-15 - 19:28 |
YujiaoChen |
dndeta, 3 methods, cent 6 |
png |
a-18.png |
r1 |
manage |
53.1 K |
2011-06-15 - 19:29 |
YujiaoChen |
dndeta, 3 methods, cent 7 |
png |
a-19.png |
r1 |
manage |
22.0 K |
2011-06-15 - 19:29 |
YujiaoChen |
occupancy |
png |
a-20.png |
r1 |
manage |
41.0 K |
2011-06-15 - 19:31 |
YujiaoChen |
Raw |
png |
a-21.png |
r1 |
manage |
42.3 K |
2011-06-15 - 19:31 |
YujiaoChen |
z0sin(theta) |
png |
a-22.png |
r1 |
manage |
24.7 K |
2011-06-15 - 19:33 |
YujiaoChen |
|
png |
a-23.png |
r1 |
manage |
38.3 K |
2011-06-15 - 19:33 |
YujiaoChen |
dndeta ALICE |
png |
a-24.png |
r1 |
manage |
54.7 K |
2011-06-15 - 19:34 |
YujiaoChen |
dndeta raw, corrected, ratio |
png |
a-3.png |
r1 |
manage |
39.1 K |
2011-06-15 - 19:21 |
YujiaoChen |
dndeta ratio with error band |
png |
a-4.png |
r1 |
manage |
29.1 K |
2011-06-15 - 19:22 |
YujiaoChen |
dndeta compared with CGC calculation |
png |
a-5.png |
r1 |
manage |
27.1 K |
2011-06-15 - 19:22 |
YujiaoChen |
dndeta ATLAS |
png |
a-6.png |
r1 |
manage |
45.0 K |
2011-06-15 - 19:23 |
YujiaoChen |
dndeta with PHOBOS |
png |
a-7.png |
r1 |
manage |
45.7 K |
2011-06-15 - 19:23 |
YujiaoChen |
M2 signal, flipped, signal-flip |
png |
a-9.png |
r1 |
manage |
63.7 K |
2011-06-15 - 19:24 |
YujiaoChen |
Detla phi vs Delta eta for layer-0 and layer-1 pixel clusters |
eps |
auxi_d0TrackPix_run169866vsHijing_ReWeight_cent0.eps |
r1 |
manage |
16.6 K |
2011-06-15 - 19:32 |
YujiaoChen |
|
eps |
auxi_detaM1_Run169866vsHijing_3sigma_Reweight.eps |
r1 |
manage |
21.0 K |
2011-06-15 - 18:58 |
YujiaoChen |
|
eps |
auxi_dndEtaRatio_errorBand.eps |
r1 |
manage |
21.0 K |
2011-06-15 - 18:50 |
YujiaoChen |
|
eps |
auxi_dndeta0to6CompareCGC.eps |
r1 |
manage |
14.8 K |
2011-06-15 - 18:50 |
YujiaoChen |
|
eps |
auxi_dndetaNpartScale_ATLAS.eps |
r1 |
manage |
13.8 K |
2011-06-15 - 18:57 |
YujiaoChen |
|
eps |
auxi_dndetaNpart_phobos.eps |
r1 |
manage |
25.0 K |
2011-06-15 - 18:04 |
YujiaoChen |
|
eps |
auxi_dndetaTrklEtM2_allThree_corseBin_Run169866_smallsize.eps |
r1 |
manage |
133.2 K |
2011-06-15 - 18:51 |
YujiaoChen |
|
eps |
auxi_dphiDetaClus_Run169866_ellipse.eps |
r1 |
manage |
478.1 K |
2011-06-15 - 18:52 |
YujiaoChen |
|
eps |
auxi_dphiM1_Run169866vsHijing_3sigma_Reweight.eps |
r1 |
manage |
22.1 K |
2011-06-15 - 18:57 |
YujiaoChen |
|
eps |
auxi_eta_pt0MagOff_m1m2tm_3sigma_tm16_2_1_5_cent0.eps |
r1 |
manage |
29.7 K |
2011-06-15 - 18:56 |
YujiaoChen |
|
eps |
auxi_eta_pt0MagOff_m1m2tm_3sigma_tm16_2_1_5_cent1.eps |
r1 |
manage |
28.9 K |
2011-06-15 - 18:56 |
YujiaoChen |
|
eps |
auxi_eta_pt0MagOff_m1m2tm_3sigma_tm16_2_1_5_cent2.eps |
r1 |
manage |
29.7 K |
2011-06-15 - 18:55 |
YujiaoChen |
|
eps |
auxi_eta_pt0MagOff_m1m2tm_3sigma_tm16_2_1_5_cent3.eps |
r1 |
manage |
29.6 K |
2011-06-15 - 18:55 |
YujiaoChen |
|
eps |
auxi_eta_pt0MagOff_m1m2tm_3sigma_tm16_2_1_5_cent4.eps |
r1 |
manage |
29.5 K |
2011-06-15 - 21:17 |
YujiaoChen |
|
eps |
auxi_eta_pt0MagOff_m1m2tm_3sigma_tm16_2_1_5_cent5.eps |
r1 |
manage |
29.9 K |
2011-06-15 - 18:55 |
YujiaoChen |
|
eps |
auxi_eta_pt0MagOff_m1m2tm_3sigma_tm16_2_1_5_cent6.eps |
r1 |
manage |
28.7 K |
2011-06-15 - 18:54 |
YujiaoChen |
|
eps |
auxi_eta_pt0MagOff_m1m2tm_3sigma_tm16_2_1_5_cent7.eps |
r1 |
manage |
28.7 K |
2011-06-15 - 18:54 |
YujiaoChen |
|
eps |
auxi_occupancy_20bins.eps |
r1 |
manage |
15.6 K |
2011-06-15 - 18:51 |
YujiaoChen |
|
eps |
auxi_rawDndetaM1_Run169866_3sigma.eps |
r1 |
manage |
31.9 K |
2011-06-15 - 18:54 |
YujiaoChen |
|
eps |
auxi_z0sinTrackPix_run169866vsHijing_ReWeight_cent0.eps |
r1 |
manage |
16.9 K |
2011-06-15 - 18:53 |
YujiaoChen |
|
eps |
limfrag_comp_v6.eps |
r1 |
manage |
15.7 K |
2011-06-15 - 18:06 |
YujiaoChen |
|
pdf |
paper_detadphi_v1.pdf |
r1 |
manage |
40.6 K |
2011-06-15 - 18:52 |
YujiaoChen |
|
png |
paper_detadphi_v1.png |
r1 |
manage |
124.1 K |
2011-06-15 - 19:50 |
YujiaoChen |
|
eps |
paper_dndetaNpart_bottom.eps |
r1 |
manage |
21.3 K |
2011-06-15 - 18:07 |
YujiaoChen |
|
pdf |
paper_dndetaNpart_v10.pdf |
r1 |
manage |
25.2 K |
2011-06-15 - 18:52 |
YujiaoChen |
|
png |
paper_dndetaNpart_v10.png |
r1 |
manage |
193.4 K |
2011-06-15 - 20:34 |
YujiaoChen |
|
pdf |
paper_dndeta_v7.pdf |
r1 |
manage |
40.9 K |
2011-06-15 - 18:53 |
YujiaoChen |
|
png |
paper_dndeta_v7.png |
r1 |
manage |
189.3 K |
2011-06-15 - 21:03 |
YujiaoChen |
|