ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 1
Monte-Carlo WorkshopMonte-Carlo Workshop
Rick FieldUniversity of Florida
Outline of Talk
Proton AntiProton
PT(hard)
Outgoing Parton
Outgoing Parton
Underlying Event Underlying Event
Initial-State Radiation
Final-State Radiation
CMS at the LHCCDF Run 2
LPCC MB&UE working group “common plots”.
More data coming!
300 GeV, 900 GeV, 1.96 TeV 900 GeV & 7 TeV
New CDF MB & UE “common plots” from the Tevatron Energy Scan.
Comparisons with PYTHIA 6.4 Tune Z1.
New CMS UE “common plots”.
CDF-CMS comparisons!
More Monte-Carlo tunes coming!
CERN November 21, 2012
New MB & UE Data and Tunes
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 2
MB&UE Working Group
CMS
ATLAS
MB & UE Common Plots
The LPCC MB&UE Working Group has suggested several MB&UE “Common Plots” the all the LHC groups can produce and compare with each other.
Proton Proton
“Minimum Bias” Collisions
Proton Proton
PT(hard)
Outgoing Parton
Outgoing Parton
Underlying Event Underlying Event
Initial-State Radiation
Final-State Radiation
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 3
CMS Common PlotsCMS Common PlotsObservable 900 GeV 7 TeV
MB1: dNchg/d Nchg ≥ 1
|| < 0.8 pT > 0.5 Gev/c & 1.0 GeV/c
Done
QCD-10-024
Done
QCD-10-024
MB2: dNchg/dpT Nchg ≥ 1 || < 0.8 Stalled Stalled
MB3: Multiplicity Distribution
|| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/cStalled Stalled
MB4: <pT> versus Nchg
|| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c
In progress
(Antwerp)
In progress
(Antwerp)
UE1: Transverse Nchg & PTsum as defined by the leading charged particle, PTmax
|| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c
Done
FSQ-12-020
Done
FSQ-12-020
Direct charged particles (including leptons) corrected to the particle level with no corrections for SD or DD.
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 4
CMS Common PlotsCMS Common PlotsObservable 900 GeV 7 TeV
MB1: dNchg/d Nchg ≥ 1
|| < 0.8 pT > 0.5 Gev/c & 1.0 GeV/c
Done
QCD-10-024
Done
QCD-10-024
MB2: dNchg/dpT Nchg ≥ 1 || < 0.8 Stalled Stalled
MB3: Multiplicity Distribution
|| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/cStalled Stalled
MB4: <pT> versus Nchg
|| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c
In progress
(Antwerp)
In progress
(Antwerp)
UE1: Transverse Nchg & PTsum as defined by the leading charged particle, PTmax
|| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c
Done
FSQ-12-020
Done
FSQ-12-020
Direct charged particles (including leptons) corrected to the particle level with no corrections for SD or DD.
Note that all the “common plots” requireat least one charged particle with
pT > 0.5 GeV/c and || < 0.8!This is done so that the plots are
less sensitive to SD and DD.
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 5
MB Common Plots 7 TeVMB Common Plots 7 TeV
Direct charged particles (including leptons) corrected to the particle level with no corrections for SD or DD.
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 6
UE Common PlotsUE Common Plots"Transverse" Charged Particle Density: dN/ddf
0.0
0.5
1.0
1.5
0 5 10 15 20 25 30
PTmax (GeV/c)
"Tra
ns
vers
e"
Ch
arg
ed D
en
sity
7 TeV
Charged Particles (|| < 0.8, PT > 0.5 GeV/c)
ATLAS (solid blue)ALICE (open black)
RDF Preliminary corrected data
"Transverse" Charged PTsum Density: dPT/ddf
0.0
0.4
0.8
1.2
1.6
0 5 10 15 20 25 30
PTmax (GeV/c)
PT
su
m D
en
sity
(G
eV
/c)
RDF Preliminary corrected data
7 TeV
Charged Particles (|| < 0.8, PT > 0.5 GeV/c) ATLAS (solid blue)ALICE (open black)
"Transverse" Charged Particle Density: dN/ddf
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
"Tra
ns
vers
e"
Ch
arg
ed D
ensi
ty RDF Preliminary corrected data
900 GeVCharged Particles (|| < 0.8, PT > 0.5 GeV/c)
ATLAS (solid blue)ALICE (open black)
"Transverse" Charged PTsum Density: dPT/ddf
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
PT
su
m D
en
sity
(G
eV
/c)
900 GeVCharged Particles (|| < 0.8, PT > 0.5 GeV/c)
ATLAS (solid blue)ALICE (open black)
RDF Preliminary corrected data
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 7
UE Common PlotsUE Common Plots
"Transverse" Charged PTsum Density: dPT/ddf
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
PT
su
m D
en
sity
(G
eV
/c)
900 GeVCharged Particles (|| < 0.8, PT > 0.5 GeV/c)
CMS (solid red)ATLAS (solid blue)ALICE (open black)
RDF Preliminary corrected data
"Transverse" Charged Particle Density: dN/ddf
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
"Tra
ns
vers
e"
Ch
arg
ed D
ensi
ty RDF Preliminary corrected data
900 GeVCharged Particles (|| < 0.8, PT > 0.5 GeV/c)
CMS (solid red)ATLAS (solid blue)ALICE (open black)
"Transverse" Charged PTsum Density: dPT/ddf
0.0
0.4
0.8
1.2
1.6
0 5 10 15 20 25 30
PTmax (GeV/c)
PT
su
m D
en
sity
(G
eV
/c)
RDF Preliminary corrected data
7 TeV
Charged Particles (|| < 0.8, PT > 0.5 GeV/c)
CMS (solid red)ATLAS (solid blue)ALICE (open black)
"Transverse" Charged Particle Density: dN/ddf
0.0
0.5
1.0
1.5
0 5 10 15 20 25 30
PTmax (GeV/c)
"Tra
ns
vers
e"
Ch
arg
ed D
en
sity
7 TeV
Charged Particles (|| < 0.8, PT > 0.5 GeV/c)
CMS (solid red)ATLAS (solid blue)ALICE (open black)
RDF Preliminary corrected data
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 8
UE Common PlotsUE Common Plots"Transverse" Charged Particle Density: dN/ddf
0.0
0.5
1.0
1.5
0 5 10 15 20 25 30
PTmax (GeV/c)
"Tra
ns
vers
e"
Ch
arg
ed D
en
sity
7 TeV
Charged Particles (|| < 0.8, PT > 0.5 GeV/c)
CMS (solid red)ATLAS (solid blue)ALICE (open black)
RDF Preliminary corrected data
Tune Z1 generator level
"Transverse" Charged PTsum Density: dPT/ddf
0.0
0.4
0.8
1.2
1.6
0 5 10 15 20 25 30
PTmax (GeV/c)
PT
su
m D
en
sity
(G
eV
/c)
RDF Preliminary corrected data
Tune Z1 generator level
7 TeV
Charged Particles (|| < 0.8, PT > 0.5 GeV/c)
CMS (solid red)ATLAS (solid blue)ALICE (open black)
"Transverse" Charged Particle Density: dN/ddf
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
"Tra
ns
vers
e"
Ch
arg
ed D
en
sity RDF Preliminary
corrected dataTune Z1 generator level
900 GeVCharged Particles (|| < 0.8, PT > 0.5 GeV/c)
CMS (solid red)ATLAS (solid blue)ALICE (open black)
"Transverse" Charged PTsum Density: dPT/ddf
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
PT
su
m D
en
sity
(G
eV
/c)
900 GeVCharged Particles (|| < 0.8, PT > 0.5 GeV/c)
CMS (solid red)ATLAS (solid blue)ALICE (open black)
RDF Preliminary corrected data
Tune Z1 generator level
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 9
Tevatron Energy ScanTevatron Energy Scan
Just before the shutdown of the Tevatron CDF has collected more than 10M “min-bias” events at several center-of-mass energies!
Proton
AntiProton
1 mile CDF
Proton AntiProton 1.96 TeV
300 GeV
300 GeV 12.1M MB Events
900 GeV 54.3M MB Events
900 GeV
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 10
CDF Common PlotsCDF Common PlotsObservable 300 GeV 900 GeV 1.96 TeV
MB1: dNchg/d Nchg ≥ 1
|| < 0.8 pT > 0.5 Gev/c & 1.0 GeV/cDone Done Done
MB2: dNchg/dpT Nchg ≥ 1 || < 0.8 In progress In progress In progress
MB3: Multiplicity Distribution
|| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/cIn progress In progress In progress
MB4: <pT> versus Nchg
|| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/cIn progress In progress In progress
UE1: Transverse Nchg & PTsum as defined by the leading charged particle, PTmax
|| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c
pT > 0.5 GeV/c
Done
pT > 0.5 GeV/c
Done
pT > 0.5 GeV/c
Done
Direct charged particles (including leptons) corrected to the particle level with no corrections for SD or DD.
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 11
UE ObservablesUE Observables“Transverse” Charged Particle Density: Number of charged particles
(pT > 0.5 GeV/c, || < cut) in the “transverse” region as defined by the leading charged particle, PTmax, divided by the area in -f space, 2cut×2/3, averaged over all events with at least one particle with pT > 0.5 GeV/c, || < cut.
PTmax Direction
f
“Toward”
“Transverse” “Transverse”
“Away”
“Transverse” Charged PTsum Density: Scalar pT sum of the charged particles (pT > 0.5 GeV/c, || < cut) in the “transverse” region as defined by the leading charged particle, PTmax, divided by the area in -f space, 2cut×2/3, averaged over all events with at least one particle with pT > 0.5 GeV/c, || < cut.
“Transverse” Charged Particle Average PT: Event-by-event <pT> = PTsum/Nchg for charged particles (pT > 0.5 GeV/c, || < cut) in the “transverse” region as defined by the leading charged particle, PTmax, averaged over all events with at least one particle in the “transverse” region with pT > 0.5 GeV/c, || < cut.
Zero “Transverse” Charged Particles: If there are no charged particles in the “transverse” region then Nchg and PTsum are zero and one includes these zeros in the average over all events with at least one particle with pT > 0.5 GeV/c, || < cut. However, if there are no charged particles in the “transverse” region then the event is not used in constructing the “transverse” average pT.
cut = 1.0 and cut = 0.8
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 12
New CDF UE DataNew CDF UE Data
Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged particle density, dN/ddf, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0.
PTmax Direction
f
“Toward”
“Transverse” “Transverse”
“Away”
"Transverse" Charged Particle Density: dN/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
erse
" C
har
ged
Den
sity
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 13
New CDF UE DataNew CDF UE Data
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged particle density, dN/ddf, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0.
PTmax Direction
f
“Toward”
“Transverse” “Transverse”
“Away”
"Transverse" Charged Particle Density: dN/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
erse
" C
har
ged
Den
sity
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
900 GeV37,075,521 Events
300 GeV7,233,840 Events
1.96 TeV25,371,145 Events
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 14
New CDF UE DataNew CDF UE Data
Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged particle density, dN/ddf, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0 compared with PYTHIA 6.4 Tune Z1.
PTmax Direction
f
“Toward”
“Transverse” “Transverse”
“Away”
"Transverse" Charged Particle Density: dN/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
erse
" C
har
ged
Den
sity
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
PYTHIA Tune Z1
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 15
New CDF UE DataNew CDF UE Data
Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged PTsum density, dPT/ddf, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0 compared with PYTHIA 6.4 Tune Z1.
PTmax Direction
f
“Toward”
“Transverse” “Transverse”
“Away”
"Transverse" Charged PTsum Density: dPT/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
erse
" P
Tsu
m D
ensi
ty (
GeV
/c)
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
PYTHIA Tune Z1
CDF Preliminary Corrected Data
Tune Z1 Generator Level
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 16
New CDF UE DataNew CDF UE Data
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged particle average pT, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0.
PTmax Direction
f
“Toward”
“Transverse” “Transverse”
“Away”
"Transverse" Charged Particle AvePT
0.6
0.8
1.0
1.2
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
erse
" A
veP
T (
GeV
/c)
1.96 TeV
300 GeV
900 GeV
Charged Particles (||<1.0, PT>0.5 GeV/c)
PYTHIA Tune Z1
CDF Preliminary Corrected Data
Tune Z1 Generator Level
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 17
Energy DependenceEnergy Dependence
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged particle density, dN/ddf, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0.
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged particle density, dN/ddf, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0 for 5.0 < PTmax < 6.0 GeV/c.
"Transverse" Charged Particle Density: dN/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
ers
e"
Ch
arg
ed
Den
sit
y
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
PYTHIA Tune Z1
"Transverse" Charged Particle Density: dN/ddf
0.25
0.35
0.45
0.55
0.65
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
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erse
" C
har
ged
Den
sity
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
CDF Preliminary Corrected Data
Tune Z1 Generator Level
PYTHIA Tune Z1
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 18
Energy Ratio: 1960/300Energy Ratio: 1960/300
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged particle density, dN/ddf, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0.
Ratio of the CDF data at 300 GeV and 1.96 TeV on the “transverse” charged particle density, dN/ddf, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0. Shows 1.96 TeV divided by 300 GeV.
"Transverse" Charged Particle Density: dN/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
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" C
ha
rge
d D
ens
ity
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
PYTHIA Tune Z1
"Transverse" Charged Particle Density: dN/ddf
1.0
2.0
3.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Ra
tio
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 300 GeV
Tune Z1
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 19
PYTHIA 6.4 Tune Z1PYTHIA 6.4 Tune Z1"Transverse" Charged Particle Density: dN/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
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erse
" C
har
ged
Den
sity CDF Preliminary
Corrected DataTune Z1 Generator Level
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
PYTHIA Tune Z1
"Transverse" Charged Particle Density: dN/ddf
0.25
0.35
0.45
0.55
0.65
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsv
erse
" C
har
ged
Den
sity
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
CDF Preliminary Corrected Data
Tune Z1 Generator Level
PYTHIA Tune Z1
"Transverse" Charged Particle Density: dN/ddf
1.0
2.0
3.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Ra
tio
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 300 GeV
Tune Z1
"Transverse" Charged Particle Density: dN/ddf
1.0
1.5
2.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Ra
tio
Charged Particles (||<1.0, PT>0.5 GeV/c)
900 GeV divided by 300 GeV
CDF Preliminary Corrected Data
Tune Z1 Generator LevelTune Z1
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 20
PYTHIA 6.4 Tune Z1PYTHIA 6.4 Tune Z1"Transverse" Charged Particle Density: dN/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
erse
" C
har
ged
Den
sity CDF Preliminary
Corrected DataTune Z1 Generator Level
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
PYTHIA Tune Z1
"Transverse" Charged Particle Density: dN/ddf
0.25
0.35
0.45
0.55
0.65
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsv
erse
" C
har
ged
Den
sity
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
CDF Preliminary Corrected Data
Tune Z1 Generator Level
PYTHIA Tune Z1
"Transverse" Charged Particle Density: dN/ddf
1.0
2.0
3.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Ra
tio
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 300 GeV
Tune Z1
"Transverse" Charged Particle Density: dN/ddf
1.0
1.5
2.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Ra
tio
Charged Particles (||<1.0, PT>0.5 GeV/c)
900 GeV divided by 300 GeV
CDF Preliminary Corrected Data
Tune Z1 Generator LevelTune Z1
"Transverse" Charged Particle Density: dN/ddf
0.0
0.4
0.8
1.2
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
erse
" C
har
ged
Den
sity
RDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
PYTHIA Tune Z1
7 TeV
CDF
CDFCDF
ALICE
ATLAS CMS
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 21
||| < 0.8 versus || < 0.8 versus || < 1.0| < 1.0
Corrected CDF data at 1.96 TeV on the average number of charged particle in the “transverse” region as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8 and || < 1.0. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
Corrected CDF data at 1.96 TeV on the average charged particle density, dN/ddf, in the “transverse” region as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8 and || < 1.0. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
"Transverse" Number of Charged Particles
0
1
2
3
4
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
erse
" N
um
be
r
CDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
1.96 TeV|| < 1.0 red squares|| < 0.8 black dots
"Transverse" Charged Particle Density: dN/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
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" C
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d D
ens
ity
CDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
1.96 TeV|| < 1.0 red squares|| < 0.8 black dots
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 22
||| < 0.8 versus || < 0.8 versus || < 1.0| < 1.0
Corrected CDF data at 1.96 TeV on the charged particle density, the charged PTsum density, and the average pT in the “transverse” region as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8 and || < 1.0. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
"Transverse" Charged Particle Density: dN/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
ers
e"
Ch
arg
ed
Den
sit
y
CDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
1.96 TeV|| < 1.0 red squares|| < 0.8 black dots
"Transverse" Charged PTsum Density: dPT/ddf
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
erse
" P
Ts
um
Den
sity
(G
eV
/c)
CDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
1.96 TeV|| < 1.0 red squares|| < 0.8 black dots
"Transverse" Charged Particle AvePT
0.6
0.8
1.0
1.2
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsv
erse
" A
veP
T (
Ge
V/c
) CDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
1.96 TeV|| < 1.0 red squares|| < 0.8 black dots
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 23
||| < 0.8 versus || < 0.8 versus || < 1.0| < 1.0
Corrected CDF data at 900 GeV on the charged particle density, the charged PTsum density, and the average pT in the “transverse” region as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8 and || < 1.0. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
"Transverse" Charged Particle Density: dN/ddf
0.0
0.2
0.4
0.6
0 5 10 15 20 25
PTmax (GeV/c)
"Tra
nsv
ers
e"
Ch
arg
ed
Den
sit
y
CDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
900 GeV|| < 1.0 red squares|| < 0.8 black dots
"Transverse" Charged PTsum Density: dPT/ddf
0.0
0.2
0.4
0.6
0 5 10 15 20 25
PTmax (GeV/c)
"Tra
nsv
ers
e"
PT
su
m D
ens
ity
(GeV
/c)
CDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
900 GeV|| < 1.0 red squares|| < 0.8 black dots
"Transverse" Charged Particle AvePT
0.6
0.8
1.0
1.2
0 5 10 15 20 25
PTmax (GeV/c)
"Tra
nsv
erse
" A
ve
PT
(G
eV
/c)
CDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
900 GeV|| < 1.0 red squares|| < 0.8 black dots
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 24
||| < 0.8 versus || < 0.8 versus || < 1.0| < 1.0
Corrected CDF data at 300 GeV on the charged particle density, the charged PTsum density, and the average pT in the “transverse” region as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8 and || < 1.0. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
"Transverse" Charged Particle Density: dN/ddf
0.0
0.2
0.4
0 2 4 6 8 10 12 14
PTmax (GeV/c)
"Tra
nsv
ers
e"
Ch
arg
ed
Den
sit
y CDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
300 GeV|| < 1.0 red squares|| < 0.8 black dots
"Transverse" Charged PTsum Density: dPT/ddf
0.0
0.2
0.4
0 2 4 6 8 10 12 14
PTmax (GeV/c)
"Tra
nsv
ers
e"
PT
su
m D
ens
ity
(GeV
/c)
CDF Preliminary Corrected Data
Charged Particles (PT>0.5 GeV/c)
300 GeV|| < 1.0 red squares|| < 0.8 black dots
"Transverse" Charged Particle AvePT
0.6
0.8
1.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
"Tra
nsv
ers
e"
Ave
PT
(G
eV
/c)
Charged Particles (PT>0.5 GeV/c)
300 GeV
CDF Preliminary Corrected Data
|| < 1.0 red squares|| < 0.8 black dots
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 25
New CDF MB DataNew CDF MB Data
CDF data at 300 GeV, 900 GeV, and 1.96 TeV and CMS data at 7 TeV on on pseudo-rapidity distribution of charged particles, dN/d, with pT > 0.5 GeV/c. Events are required to have at least one charged particle with || < 0.8 and pT > 0.5 GeV/c. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty and are compared with PYTHIA 6.4 Tune Z1.
Pseudo-Rapidity Distribution: dN/d
0
1
2
3
4
-1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0
Pseudo-Rapidity
Ave
rag
e N
um
ber
1.96 TeV
300 GeV
900 GeV
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
At least 1 charged particle
7 TeV
Tune Z1
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 26
Energy Dependence dN/dEnergy Dependence dN/d
CMS data at 7 TeV and 900 GeV and CDF data at 1.96 TeV, 900 GeV, and 300 GeV on dN/d at = 0 with pT > 0.5 GeV/c as a function of the center-of-mass energy. Events are required to have at least one charged particle with || < 0.8 and pT > 0.5 GeV/c. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty and are compared with PYTHIA 6.4 Tune Z1.
Pseudo-Rapidity Distribution: dN/d(=0)
1.0
1.5
2.0
2.5
3.0
3.5
0.1 1.0 10.0
Center-of-Mass Energy (GeV)
Ave
rag
e N
um
ber
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
At least 1 charged particle
Tune Z1
CDF black dotsCMS red squares
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 27
New CDF MB DataNew CDF MB Data
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on on pseudo-rapidity distribution of charged particles, dN/d, with pT > 1.0 GeV/c. Events are required to have at least one charged particle with || < 0.8 and pT > 1.0 GeV/c. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty and are compared with PYTHIA 6.4 Tune Z1.
Pseudo-Rapidity Distribution: dN/d
0.5
1.0
1.5
2.0
-1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0
Pseudo-Rapidity
Ave
rag
e N
um
ber
1.96 TeV
300 GeV
900 GeV
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>1.0 GeV/c)
At least 1 charged particle
7 TeV
Tune Z1
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 28
Energy Dependence dN/dEnergy Dependence dN/d
CMS data at 7 TeV and 900 GeV and CDF data at 1.96 TeV, 900 GeV, and 300 GeV on dN/d at = 0 with pT > 1.0 GeV/c as a function of the center-of-mass energy. Events are required to have at least one charged particle with || < 0.8 and pT > 1.0 GeV/c. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty and are compared with PYTHIA 6.4 Tune Z1.
Pseudo-Rapidity Distribution: dN/d(=0)
0.5
1.0
1.5
2.0
0.1 1.0 10.0
Center-of-Mass Energy (GeV)
Ave
rag
e N
um
ber
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>1.0 GeV/c)
At least 1 charged particle
Tune Z1
CDF black dotsCMS red squares
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 29
MB Common Plots 900 GeVMB Common Plots 900 GeV
Direct charged particles (including leptons) corrected to the particle level with no corrections for SD or DD.
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 30
MB Common Plots 900 GeVMB Common Plots 900 GeVPseudo-Rapidity Distribution: dN/d
1.4
1.6
1.8
2.0
2.2
-1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0
Pseudo-Rapidity
Ave
rag
e N
um
ber
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
900 GeV
At least 1 charged particle
CDF
CMS
ATLAS ALICE
Pseudo-Rapidity Distribution: dN/d
0.95
1.00
1.05
1.10
1.15
-1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0
Pseudo-Rapidity
Av
erag
e N
um
ber
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>1.0 GeV/c)
900 GeV
At least 1 charged particle
CDF
CMSATLASALICE
CDF, CMS, ATLAS, and ALICE data at 900 GeV on on pseudo-rapidity distribution of charged particles, dN/d, with pT > 0.5 GeV/c and with pT > 1.0 GeV/c. Events are required to have at least one charged particle with || < 0.8 and pT > 0.5 GeV/c or pT > 1.0 GeV/c, respectively. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 31
CDF versus CMSCDF versus CMSPseudo-Rapidity Distribution: dN/d
1.5
2.0
2.5
-1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0
Pseudo-Rapidity
Av
erag
e N
um
ber
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
900 GeV
At least 1 charged particle
CDF
CMS
Pseudo-Rapidity Distribution: dN/d
0.8
0.9
1.0
1.1
1.2
-1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0
Pseudo-Rapidity
Av
erag
e N
um
ber
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>1.0 GeV/c)
900 GeV
At least 1 charged particle
CDF
CMS
CDF and CMS data at 900 GeV on on pseudo-rapidity distribution of charged particles, dN/d, with pT > 0.5 GeV/c and with pT > 1.0 GeV/c. Events are required to have at least one charged particle with || < 0.8 and pT > 0.5 GeV/c or pT > 1.0 GeV/c, respectively. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 32
CDF versus CMSCDF versus CMS"Transverse" Charged Particle Density: dN/ddf
0.0
0.2
0.4
0.6
0.8
0 5 10 15 20 25
PTmax (GeV/c)
"Tra
nsv
ers
e"
Ch
arg
ed
Den
sit
y RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
900 GeVCMS red squaresCDF black dots
Pseudo-Rapidity Distribution: dN/d
0
1
2
3
-1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0
Pseudo-Rapidity
Av
erag
e N
um
ber
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
900 GeV
At least 1 charged particle
CDF
CMS
CDF and CMS data at 900 GeV on the pseudo-rapidity distribution, dN/d, for charged with pT > 0.5 GeV/c and || < 0.8 for events with at least one charged particle with pT > 0.5 GeV/c and || < 0.8. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
CDF and CMS data at 900 GeV/c on the charged particle density in the “transverse” region as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 33
CDF versus CMSCDF versus CMS"Transverse" Charged Particle Density: dN/ddf
0.0
0.2
0.4
0.6
0.8
0 5 10 15 20 25
PTmax (GeV/c)
"Tra
nsv
ers
e"
Ch
arg
ed
Den
sit
y RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
900 GeVCMS red squaresCDF black dots
Pseudo-Rapidity Distribution: dN/d
0
1
2
3
-1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0
Pseudo-Rapidity
Av
erag
e N
um
ber
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
900 GeV
At least 1 charged particle
CDF
CMS
Corrected CDF and CMS data at 900 GeV on the pseudo-rapidity distribution, dN/d, for charged with pT > 0.5 GeV/c and || < 0.8 for events with at least one charged particle with pT > 0.5 GeV/c and || < 0.8. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
Corrected CDF and CMS data at 900 GeV/c on the charged particle density in the “transverse” region as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8. The data are corrected to the particle level with errors that include both the statistical error and the systematic uncertainty.
CDF slightly higher than CMS!
CDF slightly higher than CMS!
"Transverse" Charged Particle Density: dN/ddf
0.0
0.2
0.4
0.6
0.8
0 6 12 18 24
PTmax (GeV/c)
"Tra
nsv
erse
" C
har
ged
Den
sity
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
900 GeV
CDF
ATLAS ALICE
CMS
CDF slightly higher than LHC!
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 34
CDF versus CMSCDF versus CMSCharged Particle Density Ratio
0.9
1.0
1.1
1.2
1.3
0 2 4 6 8 10
PTmax (GeV/c)
Ch
arg
ed D
ensi
ty R
atio
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
At least 1 charged particle
CDF/CMS
900 GeV
"Transverse"
Overall
Subprosess
0%
10%
20%
30%
40%
50%
gluon g
luon->
gluon g
luon
u ubar
->u u
bar
ubar g
luon->
ubar g
luon
u glu
on->u g
luon
d ubar
->d u
bar
u d ->
u d
u u ->
u u
Per
cen
t
Proton-Antiproton
Proton-Proton900 GeV
CDF data divided by the CMS data at 900 GeV for the charged particle density in the “transverse” region as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8 and for the overall density of charged particles with pT > 0.5 GeV/c and || < 0.8 for events with at least one charged particle with pT > 0.5 GeV/c and || < 0.8 (straight line).
QCD 2-2 sub-processes contributing to proton-proton and proton-antiproton collisions at 900 GeV from PYTHIA Tune Z1.
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 35
CDF versus CMSCDF versus CMSCharged Particle Density Ratio
0.9
1.0
1.1
1.2
1.3
0 2 4 6 8 10
PTmax (GeV/c)
Ch
arg
ed D
ensi
ty R
atio
RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
At least 1 charged particle
CDF/CMS
900 GeV
"Transverse"
Overall
Subprosess
0%
10%
20%
30%
40%
50%
gluon g
luon->
gluon g
luon
u ubar
->u u
bar
ubar g
luon->
ubar g
luon
u glu
on->u g
luon
d ubar
->d u
bar
u d ->
u d
u u ->
u u
Per
cen
t
Proton-Antiproton
Proton-Proton900 GeV
CDF data divided by the CMS data at 900 GeV for the charged particle density in the “transverse” region as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8 and for the overall density of charged particles with pT > 0.5 GeV/c and || < 0.8 for events with at least one charged particle with pT > 0.5 GeV/c and || < 0.8 (straight line).
QCD 2-2 sub-processes contributing to proton-proton and proton-antiproton collisions at 900 GeV from PYTHIA Tune Z1.
Overall: CDF > CMS by 4%equal within sys-errors!
“Transverse”: CDF > CMS by 10%not quite equal within sys-errors!
Different sub-processes in proton-antiproton and
proton-proton collisions!“Transverse” Plateau: CDF > CMS by 4%equal within sys-errors!
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 36
More Coming Soon!More Coming Soon!CDF - Many More UE Observables: Nchg density, PTsum
density, average pT, “toward”, “away”, “transverse”, “transMAX”, “transMIN”, distributions, etc..
CDF - Two Ranges: Will do (pT > 0.5 GeV/c, || < 0.8) as well as (pT > 0.5 GeV, || < 1).
CDF - Min-Bias: Many MB observables: Multiplicity, dN/d, pT distribution, <pT> versus Nchg, etc.
We now have MB & UE data at300 GeV, 900 GeV, 1.96 TeV, 7 TeV, and 8 TeV!
We can study the energy dependence more precisely than ever before!
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 37
More Data Coming!More Data Coming!CDF - Many More UE Observables: Nchg density, PTsum
density, average pT, “toward”, “away”, “transverse”, “transMAX”, “transMIN”, distributions, etc..
CDF - Two Ranges: Will do (pT > 0.5 GeV/c, || < 0.8) as well as (pT > 0.5 GeV, || < 1).
CDF - Min-Bias: Many MB observables: Multiplicity, dN/d, pT distribution, <pT> versus Nchg, etc.
We now have MB & UE data at300 GeV, 900 GeV, 1.96 TeV, 7 TeV, and 8 TeV!
We can study the energy dependence more precisely than ever before!
What we are learning shouldallow for a deeper understanding of MPI
which will result in more precisepredictions at the future LHC energy of 13 TeV!
ATLAS/CMS/LPCC MC Workshop CERN November 21, 2012
Rick Field – Florida/CDF/CMS Page 38
More Tunes Coming!More Tunes Coming!New PYTHIA 6.2 Tune: Rick is working an improved version
of Tune DW and Tune D6 using the CDF and CMS data.
New SHERPA UE Tune: Mohammed (Rick’s grad student) is working on an improved SHERPA tune using the CDF and CMS data.
New PYTHIA 6.4 Tune: Rick is working an improved version of Tune Z1 and Tune Z2 using the CDF and CMS data.
New PYTHIA 8 UE Tune: Mohammed (Rick’s grad student) is working on an improved PYTHIA 8 tune using the CDF and CMS data.
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