Monte-Carlo Workshop
New MB & UE Data and Tunes
Rick Field
University of Florida
Outline of Talk
 LPCC MB&UE working group
“common plots”.
 New CMS UE “common plots”.
CERN November 21, 2012
Outgoing Parton
 New CDF MB & UE “common plots”
from the Tevatron Energy Scan.
PT(hard)
Initial-State Radiation
Proton
AntiProton
Underlying Event
Underlying Event
 CDF-CMS comparisons!
Outgoing Parton
 Comparisons with PYTHIA 6.4 Tune Z1.
Final-State
Radiation
 More data coming!
 More Monte-Carlo tunes coming!
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
CDF Run 2
300 GeV, 900 GeV, 1.96 TeV
Rick Field – Florida/CDF/CMS
CMS at the LHC
900 GeV & 7 TeV
Page 1
MB&UE Working Group
MB & UE Common Plots
CMS
ATLAS
 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.
Outgoing Parton
“Minimum Bias” Collisions
PT(hard)
Initial-State Radiation
Proton
Proton
Underlying Event
Outgoing Parton
Proton
Proton
Underlying Event
Final-State
Radiation
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 2
CMS Common Plots
Observable
900 GeV
7 TeV
MB1: dNchg/dh Nchg ≥ 1
|h| < 0.8 pT > 0.5 Gev/c & 1.0 GeV/c
Done
QCD-10-024
Done
QCD-10-024
MB2: dNchg/dpT Nchg ≥ 1 |h| < 0.8
Stalled
Stalled
MB3: Multiplicity Distribution
|h| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c
Stalled
Stalled
MB4: <pT> versus Nchg
|h| < 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
|h| < 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 3
CMS Common Plots
Observable
900 GeV
7 TeV
MB1: dNchg/dh Nchg ≥ 1
|h| < 0.8 pT > 0.5 Gev/c & 1.0 GeV/c
Done
QCD-10-024
Done
QCD-10-024
Stalled
Stalled
MB2: dNchg/dpT Nchg ≥ 1 |h| < 0.8
that all the “common plots” require
MB3: MultiplicityNote
Distribution
Stalled
one charged
particle with Stalled
|h| < 0.8 pT > 0.5 GeV/cat&least
1.0 GeV/c
p > 0.5 GeV/c and |h| < 0.8!
MB4: <pT> versus Nchg T
In progress
In progress
This is done so that the plots are
|h| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c
(Antwerp)
(Antwerp)
less sensitive to SD and DD.
UE1: Transverse Nchg & PTsum as
defined by the leading charged
particle, PTmax
|h| < 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
MB 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 5
UE Common Plots
"Transverse" Charged Particle Density: dN/dhdf
1.6
RDF Preliminary
RDF Preliminary
corrected data
corrected data
PTsum Density (GeV/c)
"Transverse" Charged Density
1.5
"Transverse" Charged PTsum Density: dPT/dhdf
1.0
0.5
7 TeV
ATLAS (solid blue)
ALICE (open black)
1.2
0.8
7 TeV
0.4
ATLAS (solid blue)
ALICE (open black)
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
0.0
0.0
0
5
10
15
20
25
30
0
5
10
PTmax (GeV/c)
0.8
RDF Preliminary
corrected data
corrected data
PTsum Density (GeV/c)
RDF Preliminary
0.6
0.4
ATLAS (solid blue)
ALICE (open black)
20
25
30
"Transverse" Charged PTsum Density: dPT/dhdf
0.8
0.2
15
PTmax (GeV/c)
"Transverse" Charged Particle Density: dN/dhdf
"Transverse" Charged Density
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
900 GeV
0.6
0.4
0.2
0.0
900 GeV
ATLAS (solid blue)
ALICE (open black)
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
0.0
0
2
4
6
8
10
12
14
0
2
PTmax (GeV/c)
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
4
6
8
10
12
PTmax (GeV/c)
Rick Field – Florida/CDF/CMS
Page 6
14
UE Common Plots
"Transverse" Charged PTsum Density: dPT/dhdf
"Transverse" Charged Particle Density: dN/dhdf
1.6
RDF Preliminary
RDF Preliminary
corrected data
corrected data
PTsum Density (GeV/c)
"Transverse" Charged Density
1.5
1.0
0.5
CMS (solid red)
ATLAS (solid blue)
ALICE (open black)
7 TeV
1.2
0.8
7 TeV
0.4
CMS (solid red)
ATLAS (solid blue)
ALICE (open black)
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
0.0
0.0
0
5
10
15
20
25
0
30
5
10
0.8
0.8
RDF Preliminary
corrected data
corrected data
PTsum Density (GeV/c)
RDF Preliminary
0.6
0.4
CMS (solid red)
ATLAS (solid blue)
ALICE (open black)
20
25
30
"Transverse" Charged PTsum Density: dPT/dhdf
"Transverse" Charged Particle Density: dN/dhdf
0.2
15
PTmax (GeV/c)
PTmax (GeV/c)
"Transverse" Charged Density
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
900 GeV
0.6
0.4
0.2
CMS (solid red)
ATLAS (solid blue)
ALICE (open black)
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
900 GeV
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
0.0
0.0
0
2
4
6
8
10
12
14
0
2
6
8
10
12
PTmax (GeV/c)
PTmax (GeV/c)
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
4
Rick Field – Florida/CDF/CMS
Page 7
14
UE Common Plots
"Transverse" Charged PTsum Density: dPT/dhdf
"Transverse" Charged Particle Density: dN/dhdf
1.6
RDF Preliminary
corrected data
Tune Z1 generator level
PTsum Density (GeV/c)
"Transverse" Charged Density
1.5
1.0
0.5
CMS (solid red)
ATLAS (solid blue)
ALICE (open black)
7 TeV
RDF Preliminary
corrected data
Tune Z1 generator level
1.2
0.8
7 TeV
0.4
CMS (solid red)
ATLAS (solid blue)
ALICE (open black)
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
0.0
0.0
0
5
10
15
20
25
0
30
5
10
0.8
RDF Preliminary
corrected data
Tune Z1 generator level
corrected data
Tune Z1 generator level
PTsum Density (GeV/c)
"Transverse" Charged Density
RDF Preliminary
0.4
CMS (solid red)
ATLAS (solid blue)
ALICE (open black)
20
25
30
"Transverse" Charged PTsum Density: dPT/dhdf
"Transverse" Charged Particle Density: dN/dhdf
0.8
0.2
15
PTmax (GeV/c)
PTmax (GeV/c)
0.6
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
900 GeV
0.6
0.4
0.2
CMS (solid red)
ATLAS (solid blue)
ALICE (open black)
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
900 GeV
Charged Particles (|h| < 0.8, PT > 0.5 GeV/c)
0.0
0.0
0
2
4
6
8
10
12
14
0
2
6
8
10
12
PTmax (GeV/c)
PTmax (GeV/c)
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
4
Rick Field – Florida/CDF/CMS
Page 8
14
Tevatron Energy Scan
Proton
CDF
1 mile
AntiProton
Proton
1.96 TeV
900 GeV
AntiProton
300 GeV
 Just before the shutdown of the Tevatron CDF has
collected more than 10M “min-bias” events at
several center-of-mass energies!
300 GeV 12.1M MB Events
900 GeV 54.3M MB Events
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 9
CDF Common Plots
Observable
300 GeV
900 GeV
1.96 TeV
Done
Done
Done
MB2: dNchg/dpT Nchg ≥ 1 |h| < 0.8
In progress
In progress
In progress
MB3: Multiplicity Distribution
|h| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c
In progress
In progress
In progress
MB4: <pT> versus Nchg
|h| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c
In progress
In progress
In progress
UE1: Transverse Nchg & PTsum as
defined by the leading charged
particle, PTmax
|h| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c
pT > 0.5 GeV/c
Done
MB1: dNchg/dh Nchg ≥ 1
|h| < 0.8 pT > 0.5 Gev/c & 1.0 GeV/c
pT > 0.5 GeV/c pT > 0.5 GeV/c
Done
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 10
UE Observables
 “Transverse” Charged Particle Density: Number of charged
particles (pT > 0.5 GeV/c, |h| < hcut) in the “transverse” region as
defined by the leading charged particle, PTmax, divided by the area
in h-f space, 2hcut×2p/3, averaged over all events with at least one
particle with pT > 0.5 GeV/c, |h| < hcut.
 “Transverse” Charged PTsum Density: Scalar pT sum of the
charged particles (pT > 0.5 GeV/c, |h| < hcut) in the “transverse”
region as defined by the leading charged particle, PTmax, divided
by the area in h-f space, 2hcut×2p/3, averaged over all events with at
least one particle with pT > 0.5 GeV/c, |h| < hcut.
PTmax Direction
f
“Toward”
“Transverse”
“Transverse”
“Away”
 “Transverse” Charged Particle Average PT: Event-by-event <pT> = PTsum/Nchg for charged
particles (pT > 0.5 GeV/c, |h| < hcut) 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, |h| < hcut.
 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, |h| < hcut. However, if there are no charged
particles in the “transverse” region then the event is not used in constructing the “transverse”
average pT.
hcut = 1.0 and hcut = 0.8
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 11
New CDF UE Data
"Transverse" Charged Particle Density: dN/dhdf
PTmax Direction
f
“Toward”
“Transverse”
“Transverse”
“Away”
"Transverse" Charged Density
0.9
CDF Preliminary
1.96 TeV
Corrected Data
0.6
900 GeV
0.3
300 GeV
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
0.0
0
5
10
15
20
25
30
35
PTmax (GeV/c)
 Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged
particle density, dN/dhdf, as defined by the leading charged particle (PTmax) for
charged particles with pT > 0.5 GeV/c and |h| < 1.0.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 12
New CDF UE Data
"Transverse" Charged Particle Density: dN/dhdf
1.96 TeV
25,371,145 Events
PTmax Direction
f
“Toward”
“Transverse”
“Transverse”
“Away”
"Transverse" Charged Density
0.9
CDF Preliminary
1.96 TeV
Corrected Data
0.6
900 GeV
0.3
300 GeV
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
0.0
900 GeV
0
5
10
15
20
25
30
35
37,075,521
Events
PTmax (GeV/c)
 New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse”
charged particle density, dN/dhdf, as defined by the leading charged particle (PTmax)
for charged particles with pT > 0.5 GeV/c and |h| < 1.0.
300 GeV
7,233,840 Events
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 13
New CDF UE Data
"Transverse" Charged Particle Density: dN/dhdf
PTmax Direction
f
“Toward”
“Transverse”
“Transverse”
“Away”
"Transverse" Charged Density
0.9
CDF Preliminary
1.96 TeV
Corrected Data
Tune Z1 Generator Level
0.6
900 GeV
0.3
PYTHIA Tune Z1
300 GeV
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
0.0
0
5
10
15
20
25
30
35
PTmax (GeV/c)
 Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged
particle density, dN/dhdf, as defined by the leading charged particle (PTmax) for
charged particles with pT > 0.5 GeV/c and |h| < 1.0 compared with PYTHIA 6.4 Tune Z1.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 14
New CDF UE Data
PTmax Direction
f
“Toward”
“Transverse”
“Transverse”
“Away”
"Transverse" PTsum Density (GeV/c)
"Transverse" Charged PTsum Density: dPT/dhdf
0.9
CDF Preliminary
1.96 TeV
Corrected Data
Tune Z1 Generator Level
0.6
900 GeV
0.3
300 GeV
PYTHIA Tune Z1
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
0.0
0
5
10
15
20
25
30
35
PTmax (GeV/c)
 Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged
PTsum density, dPT/dhdf, as defined by the leading charged particle (PTmax) for
charged particles with pT > 0.5 GeV/c and |h| < 1.0 compared with PYTHIA 6.4 Tune Z1.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 15
New CDF UE Data
"Transverse" Charged Particle AvePT
1.2
f
“Toward”
“Transverse”
“Transverse”
“Away”
"Transverse" AvePT (GeV/c)
CDF Preliminary
PTmax Direction
Corrected Data
Tune Z1 Generator Level
1.96 TeV
1.0
900 GeV
300 GeV
0.8
PYTHIA Tune Z1
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
0.6
0
5
10
15
20
25
30
35
PTmax (GeV/c)
 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 |h| < 1.0.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 16
Energy Dependence
"Transverse" Charged Particle Density: dN/dhdf
"Transverse" Charged Particle Density: dN/dhdf
0.65
CDF Preliminary
1.96 TeV
Corrected Data
Tune Z1 Generator Level
"Transverse" Charged Density
"Transverse" Charged Density
0.9
0.6
900 GeV
0.3
PYTHIA Tune Z1
300 GeV
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
0.55
CDF Preliminary
Corrected Data
Tune Z1 Generator Level
0.45
PYTHIA Tune Z1
0.35
5.0 < PTmax < 6.0 GeV/c
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
0.25
0.0
0
5
10
15
20
25
30
35
0.1
1.0
10.0
Center-of-Mass Energy (TeV)
PTmax (GeV/c)
 New Corrected CDF data at 300 GeV, 900 GeV,  New Corrected CDF data at 300 GeV, 900 GeV,
and 1.96 TeV on the “transverse” charged
and 1.96 TeV on the “transverse” charged
particle density, dN/dhdf, as defined by the
particle density, dN/dhdf, as defined by the
leading charged particle (PTmax) for charged
leading charged particle (PTmax) for charged
particles with pT > 0.5 GeV/c and |h| < 1.0 for
particles with pT > 0.5 GeV/c and |h| < 1.0.
5.0 < PTmax < 6.0 GeV/c.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 17
Energy Ratio: 1960/300
"Transverse" Charged Particle Density: dN/dhdf
"Transverse" Charged Particle Density: dN/dhdf
3.0
CDF Preliminary
CDF Preliminary
1.96 TeV
Corrected Data
Tune Z1 Generator Level
Tune Z1
Corrected Data
Tune Z1 Generator Level
0.6
Ratio
"Transverse" Charged Density
0.9
900 GeV
2.0
0.3
PYTHIA Tune Z1
300 GeV
1.96 TeV divided by 300 GeV
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
0.0
1.0
0
5
10
15
20
25
30
35
0
PTmax (GeV/c)
2
4
6
8
10
12
PTmax (GeV/c)
 New Corrected CDF data at 300 GeV, 900 GeV,  Ratio of the CDF data at 300 GeV and 1.96
TeV on the “transverse” charged particle
and 1.96 TeV on the “transverse” charged
density, dN/dhdf, as defined by the leading
particle density, dN/dhdf, as defined by the
charged particle (PTmax) for charged
leading charged particle (PTmax) for charged
particles with pT > 0.5 GeV/c and |h| < 1.0.
particles with pT > 0.5 GeV/c and |h| < 1.0.
Shows 1.96 TeV divided by 300 GeV.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 18
14
PYTHIA 6.4 Tune Z1
"Transverse" Charged Particle Density: dN/dhdf
"Transverse" Charged Particle Density: dN/dhdf
0.65
CDF Preliminary
"Transverse" Charged Density
"Transverse" Charged Density
0.9
1.96 TeV
Corrected Data
Tune Z1 Generator Level
0.6
900 GeV
0.3
PYTHIA Tune Z1
300 GeV
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
0.0
CDF Preliminary
Corrected Data
Tune Z1 Generator Level
0.55
0.45
PYTHIA Tune Z1
0.35
5.0 < PTmax < 6.0 GeV/c
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
0.25
0
5
10
15
20
25
30
35
0.1
1.0
PTmax (GeV/c)
Center-of-Mass Energy (TeV)
"Transverse" Charged Particle Density: dN/dhdf
"Transverse" Charged Particle Density: dN/dhdf
2.0
3.0
CDF Preliminary
CDF Preliminary
Tune Z1
Tune Z1
Corrected Data
Tune Z1 Generator Level
Ratio
Corrected Data
Tune Z1 Generator Level
Ratio
10.0
2.0
1.5
900 GeV divided by 300 GeV
1.96 TeV divided by 300 GeV
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
1.0
1.0
0
2
4
6
8
10
12
14
0
2
PTmax (GeV/c)
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
4
6
8
10
12
PTmax (GeV/c)
Rick Field – Florida/CDF/CMS
Page 19
14
PYTHIA 6.4 Tune Z1
ATLAS
CMS
"Transverse" Charged Particle Density: dN/dhdf
"Transverse" Charged Particle Density: dN/dhdf
0.9
1.2
Corrected Data
Tune Z1 Generator Level
1.96 TeV
RDF Preliminary
Corrected Data
0.6
0.3
300 GeV
0.0
0
5
10
"Transverse" Charged Density
0.65
CDF Preliminary
"Transverse" Charged Density
"Transverse" Charged Density
"Transverse" Charged Particle Density: dN/dhdf
900 GeV
0.8
PYTHIA Tune Z1
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
Corrected Data
Tune Z1 Generator Level
0.55
7 TeV
0.45
PYTHIA Tune Z1
0.35
5.0 < PTmax < 6.0 GeV/c
1.96 TeV
0.25
15
20
25
30
35
900 GeV
0.4
ALICE
"Transverse" Charged Particle Density: dN/dhdf
300 GeV
CDF Preliminary
10.0
CDF Center-of-Mass Energy (TeV)
"Transverse" Charged Particle Density: dN/dhdf
PYTHIA Tune Z1
CDF 2.0
CDF Preliminary
CorrectedParticles
Data
Charged
(PT>0.5 GeV/c)
Tune Z1
Corrected Data
Tune Z1 Generator Level
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
CDF1.0
0.1
PTmax (GeV/c)
3.0
CDF Preliminary
Tune Z1
Tune Z1 Generator Level
0
5
10
2.0
15
Ratio
Ratio
0.0
20
25
30
35
1.5
PTmax (GeV/c)
900 GeV divided by 300 GeV
1.96 TeV divided by 300 GeV
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
Charged Particles (|h|<1.0, PT>0.5 GeV/c)
1.0
1.0
0
2
4
6
8
10
12
14
0
2
PTmax (GeV/c)
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
4
6
8
10
12
PTmax (GeV/c)
Rick Field – Florida/CDF/CMS
Page 20
14
|h| < 0.8 versus |h| < 1.0
"Transverse" Number of Charged Particles
"Transverse" Charged Particle Density: dN/dhdf
4
0.9
"Transverse" Charged Density
CDF Preliminary
"Transverse" Number
Corrected Data
3
2
1
1.96 TeV
|h| < 1.0 red squares
|h| < 0.8 black dots
Charged Particles (PT>0.5 GeV/c)
0
CDF Preliminary
Corrected Data
0.6
0.3
|h| < 1.0 red squares
|h| < 0.8 black dots
1.96 TeV
Charged Particles (PT>0.5 GeV/c)
0.0
0
5
10
15
20
25
30
35
0
5
PTmax (GeV/c)
10
15
20
25
30
35
PTmax (GeV/c)
 Corrected CDF data at 1.96 TeV on the average  Corrected CDF data at 1.96 TeV on the
average charged particle density, dN/dhdf, in
number of charged particle in the “transverse”
region as defined by the leading charged particle the “transverse” region as defined by the
leading charged particle (PTmax) for
(PTmax) for charged particles with pT > 0.5
charged particles with pT > 0.5 GeV/c and |h|
GeV/c and |h| < 0.8 and |h| < 1.0. The data are
< 0.8 and |h| < 1.0. The data are corrected to
corrected to the particle level with errors that
the particle level with errors that include
include both the statistical error and the
both the statistical error and the systematic
systematic uncertainty.
uncertainty.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 21
|h| < 0.8 versus |h| < 1.0
"Transverse" Charged PTsum Density: dPT/dhdf
"Transverse" Charged Density
0.9
"Transverse" PTsum Density (GeV/c)
"Transverse" Charged Particle Density: dN/dhdf
CDF Preliminary
Corrected Data
0.6
0.3
|h| < 1.0 red squares
|h| < 0.8 black dots
1.96 TeV
Charged Particles (PT>0.5 GeV/c)
0.0
0
5
10
15
20
25
30
0.9
CDF Preliminary
Corrected Data
0.6
0.3
1.96 TeV
|h| < 1.0 red squares
|h| < 0.8 black dots
Charged Particles (PT>0.5 GeV/c)
0.0
0
35
5
10
15
20
25
30
PTmax (GeV/c)
PTmax (GeV/c)
"Transverse" Charged Particle AvePT
1.2
"Transverse" AvePT (GeV/c)
 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 |h| < 0.8
and |h| < 1.0. The data are corrected to the
particle level with errors that include both
the statistical error and the systematic
uncertainty.
CDF Preliminary
Corrected Data
1.0
0.8
|h| < 1.0 red squares
|h| < 0.8 black dots
1.96 TeV
Charged Particles (PT>0.5 GeV/c)
0.6
0
5
10
15
20
25
30
PTmax (GeV/c)
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
35
Rick Field – Florida/CDF/CMS
Page 22
35
|h| < 0.8 versus |h| < 1.0
"Transverse" Charged Density
0.6
"Transverse" Charged PTsum Density: dPT/dhdf
"Transverse" PTsum Density (GeV/c)
"Transverse" Charged Particle Density: dN/dhdf
CDF Preliminary
Corrected Data
0.4
0.2
|h| < 1.0 red squares
|h| < 0.8 black dots
900 GeV
Charged Particles (PT>0.5 GeV/c)
0.0
0
5
10
15
20
0.6
CDF Preliminary
Corrected Data
0.4
0.2
900 GeV
|h| < 1.0 red squares
|h| < 0.8 black dots
Charged Particles (PT>0.5 GeV/c)
0.0
25
0
5
10
PTmax (GeV/c)
15
20
PTmax (GeV/c)
"Transverse" Charged Particle AvePT
1.2
"Transverse" AvePT (GeV/c)
 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 |h| < 0.8
and |h| < 1.0. The data are corrected to the
particle level with errors that include both
the statistical error and the systematic
uncertainty.
CDF Preliminary
Corrected Data
1.0
0.8
900 GeV
|h| < 1.0 red squares
|h| < 0.8 black dots
Charged Particles (PT>0.5 GeV/c)
0.6
0
5
10
15
20
PTmax (GeV/c)
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
25
Rick Field – Florida/CDF/CMS
Page 23
25
|h| < 0.8 versus |h| < 1.0
"Transverse" Charged PTsum Density: dPT/dhdf
"Transverse" Charged Particle Density: dN/dhdf
"Transverse" PTsum Density (GeV/c)
"Transverse" Charged Density
0.4
CDF Preliminary
Corrected Data
0.2
|h| < 1.0 red squares
|h| < 0.8 black dots
300 GeV
Charged Particles (PT>0.5 GeV/c)
0.0
0
2
4
6
8
10
12
0.4
CDF Preliminary
Corrected Data
0.2
|h| < 1.0 red squares
|h| < 0.8 black dots
300 GeV
Charged Particles (PT>0.5 GeV/c)
0.0
0
14
2
4
6
8
10
12
PTmax (GeV/c)
PTmax (GeV/c)
"Transverse" Charged Particle AvePT
1.0
CDF Preliminary
"Transverse" AvePT (GeV/c)
 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 |h| < 0.8
and |h| < 1.0. The data are corrected to the
particle level with errors that include both
the statistical error and the systematic
uncertainty.
Corrected Data
0.8
|h| < 1.0 red squares
|h| < 0.8 black dots
300 GeV
Charged Particles (PT>0.5 GeV/c)
0.6
0
2
4
6
8
10
12
PTmax (GeV/c)
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
14
Rick Field – Florida/CDF/CMS
Page 24
14
New CDF MB Data
Pseudo-Rapidity Distribution: dN/dh
4
RDF Preliminary
7 TeV
Average Number
Corrected Data
3
1.96 TeV
2
1
900 GeV
300 GeV
At least 1 charged particle
Tune Z1
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
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
 CDF data at 300 GeV, 900 GeV, and 1.96 TeV and CMS data at 7 TeV on on pseudorapidity distribution of charged particles, dN/dh, with pT > 0.5 GeV/c. Events are
required to have at least one charged particle with |h| < 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.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 25
Energy Dependence dN/dh
Pseudo-Rapidity Distribution: dN/dh(h=0)
3.5
RDF Preliminary
Corrected Data
Average Number
3.0
CDF black dots
CMS red squares
Tune Z1
2.5
2.0
At least 1 charged particle
1.5
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
1.0
0.1
1.0
10.0
Center-of-Mass Energy (GeV)
 CMS data at 7 TeV and 900 GeV and CDF data at 1.96 TeV, 900 GeV, and 300 GeV on
dN/dh at h = 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 |h| < 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.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 26
New CDF MB Data
Pseudo-Rapidity Distribution: dN/dh
2.0
RDF Preliminary
7 TeV
Average Number
Corrected Data
1.5
1.96 TeV
900 GeV
1.0
At least 1 charged particle
300 GeV
Tune Z1
Charged Particles (|h|<0.8, PT>1.0 GeV/c)
0.5
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
Pseudo-Rapidity
 New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on on pseudo-rapidity
distribution of charged particles, dN/dh, with pT > 1.0 GeV/c. Events are required to
have at least one charged particle with |h| < 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.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 27
Energy Dependence dN/dh
Pseudo-Rapidity Distribution: dN/dh(h=0)
2.0
RDF Preliminary
Average Number
Corrected Data
CDF black dots
CMS red squares
Tune Z1
1.5
1.0
At least 1 charged particle
Charged Particles (|h|<0.8, PT>1.0 GeV/c)
0.5
0.1
1.0
10.0
Center-of-Mass Energy (GeV)
 CMS data at 7 TeV and 900 GeV and CDF data at 1.96 TeV, 900 GeV, and 300 GeV on
dN/dh at h = 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 |h| < 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.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 28
MB 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 29
MB Common Plots 900 GeV
Pseudo-Rapidity Distribution: dN/dh
Pseudo-Rapidity Distribution: dN/dh
1.15
2.2
RDF Preliminary
CDF
RDF Preliminary
900 GeV
2.0
1.8
CMS
1.6
ATLAS
ALICE
900 GeV
Corrected Data
Average Number
Average Number
Corrected Data
1.10
1.05
1.00
At least 1 charged particle
CDF
CMS
ATLAS
ALICE
At least 1 charged
particle
Charged Particles (|h|<0.8, PT>1.0 GeV/c)
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
1.4
0.95
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
-1.0
-0.8
Pseudo-Rapidity
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
Pseudo-Rapidity
 CDF, CMS, ATLAS, and ALICE data at 900 GeV on on pseudo-rapidity distribution of
charged particles, dN/dh, with pT > 0.5 GeV/c and with pT > 1.0 GeV/c. Events are required to
have at least one charged particle with |h| < 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 30
CDF versus CMS
Pseudo-Rapidity Distribution: dN/dh
Pseudo-Rapidity Distribution: dN/dh
1.2
2.5
RDF Preliminary
CDF
2.0
1.1
1.0
CMS
900 GeV
0.9
At least 1 charged particle
CMS
CDF
Corrected Data
Average Number
Average Number
RDF Preliminary
900 GeV
Corrected Data
At least 1 charged
particle
Charged Particles (|h|<0.8, PT>1.0 GeV/c)
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
0.8
1.5
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
Pseudo-Rapidity
Pseudo-Rapidity
 CDF and CMS data at 900 GeV on on pseudo-rapidity distribution of charged particles, dN/dh,
with pT > 0.5 GeV/c and with pT > 1.0 GeV/c. Events are required to have at least one charged
particle with |h| < 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 CMS
Pseudo-Rapidity Distribution: dN/dh
"Transverse" Charged Particle Density: dN/dhdf
3
0.8
Average Number
Corrected Data
CDF
2
900 GeV
CMS
1
At least 1 charged particle
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
0
"Transverse" Charged Density
RDF Preliminary
RDF Preliminary
Corrected Data
0.6
0.4
0.2
900 GeV
CMS red squares
CDF black dots
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
0.0
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
0
Pseudo-Rapidity
5
10
15
20
25
PTmax (GeV/c)
 CDF and CMS data at 900 GeV on the pseudo-  CDF and CMS data at 900 GeV/c on the
charged particle density in the “transverse”
rapidity distribution, dN/dh, for charged with
region as defined by the leading charged
pT > 0.5 GeV/c and |h| < 0.8 for events with at
particle (PTmax) for charged particles with
least one charged particle with pT > 0.5 GeV/c
pT > 0.5 GeV/c and |h| < 0.8. The data are
and |h| < 0.8. The data are corrected to the
corrected to the particle level with errors that
particle level with errors that include both the
include both the statistical error and the
statistical error and the systematic uncertainty.
systematic uncertainty.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 32
CDF versus CMS
CDF slightly higher
than CMS!
CDF
slightlyParticle
higherDensity: dN/dhdf
"Transverse"
Charged
Pseudo-Rapidity Distribution: dN/dh
3
CDF
2
900 GeV
CMS
1
At least 1 charged particle
"Transverse" Charged Density
Corrected Data
Average Number
than CMS!
0.8
RDF Preliminary
RDF Preliminary
Corrected Data
0.6
0.4
0.2
900 GeV
red squares
"Transverse" Charged Particle Density:CMS
dN/dhdf
CDF black dots
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
0.8
0
-0.8
-0.6
RDF0.2
Preliminary
-0.4
0.0higher
0.4
0.6
CDF -0.2
slightly
Corrected
Data
Pseudo-Rapidity
than
LHC!
"Transverse" Charged Density
-1.0
0.6
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
0.0
0.8
1.0
0
5
10
15
20
25
PTmax (GeV/c)
CMS
 Corrected CDF and CMS data at 900 GeV on  Corrected CDF and CMS data at 900 GeV/c
on the charged particle density in the
the pseudo-rapidity distribution,
dN/dh, for
0.4
“transverse” region as defined by the leading
charged with pT > 0.5 GeV/c and |h| < 0.8 for
CDF
charged
particle (PTmax) for charged
events with at least one
0.2 charged particle with pT ALICE
900
GeVp > 0.5 GeV/c and |h| < 0.8.
ATLAS
particles with
T
> 0.5 GeV/c and |h| < 0.8. The data are
The
data
are
corrected
to the particle level
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
corrected to the particle
level
with
errors
that
0.0
with errors that include both the statistical
0
12 error and the
18 systematic 24
include both the statistical
error and6the
uncertainty.
PTmax
(GeV/c)
systematic uncertainty.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 33
CDF versus CMS
Subprosess
Charged Particle Density Ratio
50%
1.3
RDF Preliminary
40%
"Transverse"
1.2
Percent
900 GeV
1.1
900 GeV
Proton-Proton
30%
20%
10%
u
u
u
->
u
d
->
u
d
u
->
ub
ar
d
gl
uo
n-
>u
d
gl
ub
uo
n
on
ba
rg
>u
n-
gl
uo
gl
uo
n
ar
10
ub
8
u
6
PTmax (GeV/c)
lu
ub
u
->
ub
ar
lu
o
>g
4
uo
n-
2
gl
0
u
n
n
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
0.9
ar
0%
At least 1 charged particle
Overall
ar
1.0
gl
uo
Charged Density Ratio
Proton-Antiproton
CDF/CMS
Corrected Data
 CDF data divided by the CMS data at 900 GeV  QCD 2-2 sub-processes contributing to protonfor the charged particle density in the
proton and proton-antiproton collisions at 900
“transverse” region as defined by the leading
GeV from PYTHIA Tune Z1.
charged particle (PTmax) for charged particles
with pT > 0.5 GeV/c and |h| < 0.8 and for the
overall density of charged particles with pT >
0.5 GeV/c and |h| < 0.8 for events with at least
one charged particle with pT > 0.5 GeV/c and |h|
< 0.8 (straight line).
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 34
CDF versus CMS
“Transverse”:
CDF > CMS by 10%
Charged Particle Density
Ratio
not quite equal within sys-errors!
1.3
RDF Preliminary
40%
"Transverse"
1.2
Percent
900 GeV
1.1
900 GeV
Proton-Proton
30%
20%
10%
u
u
u
->
u
d
->
u
d
u
->
ub
ar
d
gl
uo
n-
>u
d
gl
ub
uo
n
on
ba
rg
>u
n-
ar
gl
uo
u
10
ub
(GeV/c)
lu
ub
u
->
ub
ar
lu
o
>g
8
uo
n-
6
gl
4
uo
n
2
gl
0
Overall: CDF > CMS by 4%
PTmax
equal within sys-errors!
u
n
n
Charged Particles (|h|<0.8, PT>0.5 GeV/c)
0.9
ar
0%
At least 1 charged particle
Overall
ar
1.0
gl
uo
Charged Density Ratio
Proton-Antiproton
CDF/CMS
Corrected Data
Subprosess
50%
 CDF data divided by the CMS data at 900 GeV  QCD 2-2 sub-processes contributing to protonfor the charged particle density in the
proton and proton-antiproton collisions at 900
“transverse” region as defined by the leading
GeV from PYTHIA Tune Z1.
Different sub-processes in
charged particle (PTmax) for charged particles
proton-antiproton and
with pT > 0.5 GeV/c and |h| < 0.8 and
for
the
“Transverse” Plateau: CDF > CMS by 4%
proton-proton collisions!
overall density of charged particles with pequal
T > within sys-errors!
0.5 GeV/c and |h| < 0.8 for events with at least
one charged particle with pT > 0.5 GeV/c and |h|
< 0.8 (straight line).
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 35
More Coming Soon!
CDF - Many More UE Observables: Nchg density, PTsum
density, average pT, “toward”, “away”, “transverse”,
“transMAX”, “transMIN”, distributions, etc..
CDF - Two h Ranges: Will do (pT > 0.5 GeV/c, |h| < 0.8) as
well as (pT > 0.5 GeV, |h| < 1).
CDF - Min-Bias: Many MB observables: Multiplicity,
dN/dh, pT distribution, <pT> versus Nchg, etc.
We now have MB & UE data at
300 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 36
More Data Coming!
CDF - Many More UE Observables: Nchg density, PTsum
density, average pT, “toward”, “away”, “transverse”,
“transMAX”, “transMIN”, distributions, etc..
What we are learning should
CDF - Two h Ranges: Will do (pT > 0.5 GeV/c, |h| < 0.8) as
allow for a deeper understanding of MPI
well as (pT > 0.5 GeV, |h| < 1).
which will result in more precise
predictions
at the futureMultiplicity,
CDF - Min-Bias: Many
MB observables:
LHC
of 13 TeV!
dN/dh, pT distribution,
<penergy
T> versus Nchg, etc.
We now have MB & UE data at
300 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 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 PYTHIA 6.4 Tune: Rick is working an improved version
of Tune Z1 and Tune Z2 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 8 UE Tune: Mohammed (Rick’s grad
student) is working on an improved PYTHIA 8 tune using
the CDF and CMS data.
ATLAS/CMS/LPCC MC Workshop
CERN November 21, 2012
Rick Field – Florida/CDF/CMS
Page 38