Post on 05-Feb-2016
description
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 1
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
CDF PYTHIA 6.2 Tevatron Tune DW.
CMS PYTHIA 6.4 LHC Tune Z1.
300 GeV, 900 GeV, 1.96 TeV 900 GeV, 7 & 8 TeV
New UE data at 300 GeV, 900 GeV, and 1.96 TeV from the Tevatron Energy-Scan.
New comparisons with PYTHIA 6.4 Tune Z1.
New MB data at 300 GeV, 900 GeV, and 1.96 TeV from the Tevatron Energy-Scan.
Tel Aviv University October 14-18, 2012
LPCC MB&UE working group “common plots”.
MPI@TAU 2012MPI@TAU 2012Energy Dependence of the UE
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 2
Traditional ApproachTraditional Approach
Look at charged particle correlations in the azimuthal angle relative to a leading object (i.e. CaloJet#1, ChgJet#1, PTmax, Z-boson). For CDF PTmin = 0.5 GeV/c cut = 1.
Charged Particle Correlations PT > PTmin || < cut
Leading Object Direction
“Toward”
“Transverse” “Transverse”
“Away”
Define || < 60o as “Toward”, 60o < || < 120o as “Transverse”, and || > 120o as “Away”.
Leading Calorimeter Jet or Leading Charged Particle Jet or
Leading Charged Particle orZ-Boson
-cut +cut
2
0
Leading Object
Toward Region
Transverse Region
Transverse Region
Away Region
Away Region
All three regions have the same area in - space, × = 2cut×120o = 2cut×2/3. Construct densities by dividing by the area in - space.
Charged Jet #1Direction
“Transverse” “Transverse”
“Toward”
“Away”
“Toward-Side” Jet
“Away-Side” Jet
“Transverse” region very sensitive to the “underlying event”!
CDF Run 1 Analysis
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 3
““Transverse” Charged DensityTransverse” Charged Density PTmax Direction
“Toward”
“Transverse” “Transverse”
“Away”
ChgJet#1 Direction
“Toward”
“Transverse” “Transverse”
“Away”
Shows the charged particle density in the “transverse” region for charged particles (pT > 0.5 GeV/c, || < 1) at 7 TeV as defined by PTmax, PT(chgjet#1), and PT(muon-pair) from PYTHIA Tune DW at the particle level (i.e. generator level). Charged particle jets are constructed using the Anti-KT algorithm with d = 0.5.
"Transverse" Charged Particle Density: dN/dd
0.0
0.4
0.8
1.2
1.6
0 5 10 15 20 25 30 35 40 45 50
PT(chgjet#1) or PTmax or PT(pair) (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity
7 TeV
Charged Particles (||<1.0, PT>0.5 GeV/c)
RDF Preliminarypy Tune DW generator level
PTmax
ChgJet#1DY(muon-pair)
70 < M(pair) < 110 GeV
Muon-Pair Direction
“Toward”
“Transverse” “Transverse”
“Away”
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 4
Jet Radius DependenceJet Radius Dependence
The charged particle density in the “transverse” region as defined by the leading charged particle jet from PYTHIA Tune Z1. The charged particles are in the region pT > 0.5 GeV/c and || < 2.5. Charged particle jets are constructed using the Anti-KT algorithm with d = 0.2, 0.5, and 1.0 from charged particles in the region pT > 0.5 GeV/c and || < 2.5, however, the leading charged particle jet is required to have |(chgjet#1)| < 1.5.
The UE activity is higherfor large jet radius!
"Transverse" Charged Particle Density: dN/dd
0.0
0.5
1.0
1.5
0 10 20 30 40 50 60 70 80 90 100
PT(chgjet#1) GeV/c
Cha
rged
Par
ticle
Den
sity
Charged Particles (||<2.5, PT>0.5 GeV/c)
Chgjet#1 (||<1.5)
7 TeV
RDF PreliminarypyZ1 generator level
d = 0.5
d = 0.2
d = 1.0
Tune Z1
It seems that large jet radius “biases” the UE to be more active!
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 5
PYTHIA Tune DWPYTHIA Tune DW
PTmax Direction
“Toward”
“Transverse” “Transverse”
“Away”
"Transverse" Charged Particle Density: dN/dd
0.0
0.4
0.8
1.2
0 2 4 6 8 10 12 14 16 18 20
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity RDF Preliminary
ATLAS corrected dataTune DW generator level
900 GeV
7 TeV
Charged Particles (||<2.5, PT>0.5 GeV/c)
ATLAS preliminary data at 900 GeV and 7 TeV on the “transverse” charged particle density, dN/dd, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 2.5. The data are corrected and compared with PYTHIA Tune DW at the generator level.
CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged particle density, dN/dd, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and || < 2. The data are uncorrected and compared with PYTHIA Tune DW after detector simulation.
"Transverse" Charged Particle Density: dN/dd
0.0
0.4
0.8
1.2
0 5 10 15 20 25 30 35 40 45 50
PT(chgjet#1) GeV/c
Cha
rged
Par
ticle
Den
sity
900 GeV
CMS Preliminarydata uncorrected
pyDW + SIM
Charged Particles (||<2.0, PT>0.5 GeV/c)
7 TeV
CMS ATLAS
PT(chgjet#1) Direction
“Toward”
“Transverse” “Transverse”
“Away”
"Transverse" Charged Particle Density: dN/dd
0.0
0.4
0.8
1.2
0 50 100 150 200 250 300 350 400
PT(jet#1) GeV/c
Cha
rged
Par
ticle
Den
sity CDF 1.96 TeV
Leading Jet
RDF Preliminarydata corrected
pyDW generator level
Charged Particles (PT>0.5 GeV/c, || < 1.0)
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 6
PYTHIA Tune DWPYTHIA Tune DW
Ratio of CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged particle density, dN/dd, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and || < 2. The data are uncorrected and compared with PYTHIA Tune DW after detector simulation.
"Transverse" Charged Particle Density: dN/dd
0.0
1.0
2.0
3.0
0 2 4 6 8 10 12 14 16 18
PT(chgjet#1) (GeV/c)
Rat
io: 7
TeV
/900
GeV
CMS Preliminarydata uncorrected
pyDW + SIM
Charged Particles (||<2.0, PT>0.5 GeV/c) 7 TeV / 900 GeV
CMS
PT(chgjet#1) Direction
“Toward”
“Transverse” “Transverse”
“Away”
CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged particle density, dN/dd, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and || < 2. The data are uncorrected and compared with PYTHIA Tune DW after detector simulation.
"Transverse" Charged Particle Density: dN/dd
0.0
0.4
0.8
1.2
0 5 10 15 20 25 30 35 40 45 50
PT(chgjet#1) GeV/c
Cha
rged
Par
ticle
Den
sity
900 GeV
CMS Preliminarydata uncorrected
pyDW + SIM
Charged Particles (||<2.0, PT>0.5 GeV/c)
7 TeV
CMS
PT(chgjet#1) Direction
“Toward”
“Transverse” “Transverse”
“Away”
Ratio
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 7
PYTHIA Tune Z1PYTHIA Tune Z1
Proton Proton
PT(hard)
Outgoing Parton
Outgoing Parton
Underlying Event Underlying Event
Initial-State Radiation
Final-State Radiation
I believe that it is time to move to PYTHIA 6.4 (pT-ordered parton showers and new MPI model)!
Tune Z1: I started with the parameters of ATLAS Tune AMBT1, but I changed LO* to CTEQ5L and I varied PARP(82) and PARP(90) to get a very good fit of the CMS UE data at 900 GeV and 7 TeV.
UE&MB@CMSUE&MB@CMS
All my previous tunes (A, DW, DWT, D6, D6T, CW, X1, and X2) were PYTHIA 6.4 tunes using the old Q2-ordered parton showers and the old MPI model (really 6.2 tunes)!
PARP(90)
Color
Connections
PARP(82)
Diffraction
The ATLAS Tune AMBT1 was designed to fit the inelastic data for Nchg ≥ 6 and to fit the PTmax UE data with PTmax > 10 GeV/c. Tune AMBT1 is primarily a min-bias tune, while Tune Z1 is a UE tune!
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 8
PYTHIA Tune Z1PYTHIA Tune Z1Parameter
Tune Z1(R. Field CMS)
Tune AMBT1 (ATLAS)
Parton Distribution Function CTEQ5L LO*
PARP(82) – MPI Cut-off 1.932 2.292
PARP(89) – Reference energy, E0 1800.0 1800.0
PARP(90) – MPI Energy Extrapolation 0.275 0.25
PARP(77) – CR Suppression 1.016 1.016
PARP(78) – CR Strength 0.538 0.538
PARP(80) – Probability colored parton from BBR 0.1 0.1
PARP(83) – Matter fraction in core 0.356 0.356
PARP(84) – Core of matter overlap 0.651 0.651
PARP(62) – ISR Cut-off 1.025 1.025
PARP(93) – primordial kT-max 10.0 10.0
MSTP(81) – MPI, ISR, FSR, BBR model 21 21
MSTP(82) – Double gaussion matter distribution 4 4
MSTP(91) – Gaussian primordial kT 1 1
MSTP(95) – strategy for color reconnection 6 6
Parameters not shown are the PYTHIA 6.4
defaults!
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 9
CMS UE DataCMS UE Data
CMS published data at 900 GeV and 7 TeV on the “transverse” charged PTsum density, dPT/dd, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and || < 2.0. The data are corrected and compared with PYTHIA Tune Z1 at the generator level.
CMS published data at 900 GeV and 7 TeV on the “transverse” charged particle density, dN/dd, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and || < 2.0. The data are corrected and compared with PYTHIA Tune Z1 at the generator level.
CMS
"Transverse" Charged Particle Density: dN/dd
0.0
0.4
0.8
1.2
1.6
0 10 20 30 40 50 60 70 80 90 100
PT(chgjet#1) GeV/c
Cha
rged
Par
ticle
Den
sity
CMS Preliminarydata corrected
Tune Z1 generator level
900 GeV
7 TeV
Charged Particles (||<2.0, PT>0.5 GeV/c)
"Transverse" Charged PTsum Density: dPT/dd
0.0
0.4
0.8
1.2
1.6
2.0
0 10 20 30 40 50 60 70 80 90 100
PT(chgjet#1) GeV/c
PTsu
m D
ensi
ty (
GeV
/c)
Charged Particles (||<2.0, PT>0.5 GeV/c)
CMS Preliminarydata corrected
Tune Z1 generator level
900 GeV
7 TeV
Tune Z1
Very nice agreement!CMS correcteddata!
CMS correcteddata!
CMSTune Z1
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 10
ATLAS UE DataATLAS UE Data
ATLAS published data at 900 GeV and 7 TeV on the “transverse” charged PTsum density, dPT/dd, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 2.5. The data are corrected and compared with PYTHIA Tune Z1 at the generrator level.
ATLAS published data at 900 GeV and 7 TeV on the “transverse” charged particle density, dN/dd, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 2.5. The data are corrected and compared with PYTHIA Tune Z1 at the generator level.
ATLASATLASTune Z1Tune Z1
ATLAS publication – arXiv:1012.0791December 3, 2010
"Transverse" Charged Particle Density: dN/dd
0.0
0.4
0.8
1.2
0 5 10 15 20 25
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity
Charged Particles (||<2.5, PT>0.5 GeV/c)
RDF Preliminary ATLAS corrected dataTune Z1 generator level
900 GeV
7 TeV
"Transverse" Charged PTsum Density: dPT/dd
0.0
0.5
1.0
1.5
0 5 10 15 20 25
PTmax (GeV/c)
PTs
um D
ensi
ty (G
eV/c
)
Charged Particles (||<2.5, PT>0.5 GeV/c)
RDF PreliminaryATLAS corrected data
Tune Z1 generator level
900 GeV
7 TeV
"Transverse" Charged Particle Density: dN/dd
0.0
0.3
0.6
0.9
1.2
0 50 100 150 200 250 300 350 400
PT(jet#1) (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
CDF PublishedCorrected Data
PYTHIA Tune Z1
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 11
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
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 12
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
DoneQCD-10-024
DoneQCD-10-024
MB2: dNchg/dpT Nchg ≥ 1 || < 0.8 Stalled Stalled
MB3: Multiplicity Distribution|| < 0.8 pT > 0.5 GeV/c & 1.0 GeV/c Stalled 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
DoneFSQ-12-020
DoneFSQ-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 done so that the plots are
less sensitive to SD and DD.
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 13
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.
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 14
UE Common PlotsUE Common Plots"Transverse" Charged Particle Density: dN/dd
0.0
0.5
1.0
1.5
0 5 10 15 20 25 30
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
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/dd
0.0
0.4
0.8
1.2
1.6
0 5 10 15 20 25 30
PTmax (GeV/c)
PTsu
m D
ensi
ty (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/dd
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity 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/dd
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
PTsu
m D
ensi
ty (G
eV/c
)
900 GeVCharged Particles (|| < 0.8, PT > 0.5 GeV/c)
ATLAS (solid blue)ALICE (open black)
RDF Preliminary corrected data
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 15
New CMS UE DataNew CMS UE Data
CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged PTsum density, dPT/dd, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8. The data are corrected and compared with PYTHIA Tune Z1 at the generator level.
CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged particle density, dN/dd, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 0.8. The data are corrected and compared with PYTHIA Tune Z1 at the generator level.
Very nice agreement!CMS correcteddata!
CMS correcteddata!
"Transverse" Charged Particle Density: dN/dd
0.0
0.5
1.0
1.5
0 5 10 15 20 25 30
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity CMS Preliminary
corrected dataTune Z1 generator level
Charged Particles (||<0.8, PT>0.5 GeV/c)
900 GeV
7 TeV
"Transverse" Charged PTsum Density: dPT/dd
0.0
0.4
0.8
1.2
1.6
0 5 10 15 20 25 30
PTmax (GeV/c)
PTsu
m D
ensi
ty (G
eV/c
)
CMS Preliminary corrected data
Tune Z1 generator level
Charged Particles (||<0.8, PT>0.5 GeV/c)
900 GeV
7 TeV
Tune Z1
CMS CMSTune Z1
"Transverse" Charged Particle Density: dN/dd
0.0
0.5
1.0
1.5
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity RDF Preliminary
Tune Z1
Charged Particles (|| < 0.8, PT > 0.5 GeV/c)
7 TeV
8 TeV
Less than 4% change!
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 16
UE Common PlotsUE Common Plots"Transverse" Charged Particle Density: dN/dd
0.0
0.5
1.0
1.5
0 5 10 15 20 25 30
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
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/dd
0.0
0.4
0.8
1.2
1.6
0 5 10 15 20 25 30
PTmax (GeV/c)
PTsu
m D
ensi
ty (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/dd
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity 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/dd
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
PTsu
m D
ensi
ty (G
eV/c
)
900 GeVCharged Particles (|| < 0.8, PT > 0.5 GeV/c)
ATLAS (solid blue)ALICE (open black)
RDF Preliminary corrected data
"Transverse" Charged PTsum Density: dPT/dd
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
PTsu
m D
ensi
ty (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/dd
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity 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/dd
0.0
0.4
0.8
1.2
1.6
0 5 10 15 20 25 30
PTmax (GeV/c)
PTsu
m D
ensi
ty (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/dd
0.0
0.5
1.0
1.5
0 5 10 15 20 25 30
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
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
"Transverse" Charged Particle Density: dN/dd
0.0
0.5
1.0
1.5
0 5 10 15 20 25 30
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
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/dd
0.0
0.4
0.8
1.2
1.6
0 5 10 15 20 25 30
PTmax (GeV/c)
PTsu
m D
ensi
ty (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/dd
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
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/dd
0.0
0.2
0.4
0.6
0.8
0 2 4 6 8 10 12 14
PTmax (GeV/c)
PTsu
m D
ensi
ty (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
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 17
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 TeV300 GeV
300 GeV 12.1M MB Events900 GeV 54.3M MB Events
900 GeV
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 18
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/dd, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0.
PTmax Direction
“Toward”
“Transverse” “Transverse”
“Away”
"Transverse" Charged Particle Density: dN/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
"Transverse" Charged Particle Density: dN/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
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
900 GeV37,075,521 Events
300 GeV7,233,840 Events
1.96 TeV25,371,145 Events
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 19
New CDF UE DataNew CDF UE Data
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged PTsum density, dPT/dd, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0.
PTmax Direction
“Toward”
“Transverse” “Transverse”
“Away”
"Transverse" Charged PTsum Density: dPT/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
PTs
um D
ensi
ty (G
eV/c
)
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
"Transverse" Charged PTsum Density: dPT/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
PTs
um D
ensi
ty (G
eV/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
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 20
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
“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
nsve
rse"
Ave
PT (G
eV/c
)
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV900 GeV
"Transverse" Charged Particle AvePT
0.6
0.8
1.0
1.2
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Ave
PT (G
eV/c
) 1.96 TeV
300 GeV900 GeV
Charged Particles (||<1.0, PT>0.5 GeV/c)
PYTHIA Tune Z1
CDF Preliminary Corrected Data
Tune Z1 Generator Level
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 21
Energy DependenceEnergy Dependence"Transverse" Charged Particle Density: dN/dd
0.25
0.35
0.45
0.55
0.65
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsve
rse"
Cha
rged
Den
sity CDF Preliminary
Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged particle density, dN/dd, 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/dd, 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/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
"Transverse" Charged Particle Density: dN/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
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
"Transverse" Charged Particle Density: dN/dd
0.25
0.35
0.45
0.55
0.65
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsve
rse"
Cha
rged
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
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 22
Energy DependenceEnergy Dependence
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged PTsum density, dPT/dd, 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 PTsum density, dPT/dd, 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 PTsum Density: dPT/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
PTs
um D
ensi
ty (G
eV/c
)
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
"Transverse" Charged PTsum Density: dPT/dd
0.2
0.3
0.4
0.5
0.6
0.7
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsve
rse"
PTs
um D
ensi
ty (G
eV/c
)
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
CDF Preliminary Corrected Data
"Transverse" Charged PTsum Density: dPT/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
PTs
um D
ensi
ty (G
eV/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
"Transverse" Charged PTsum Density: dPT/dd
0.2
0.3
0.4
0.5
0.6
0.7
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsve
rse"
PTs
um D
ensi
ty (G
eV/c
)
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Tune Z1
"Transverse" Charged Density
0.2
0.3
0.4
0.5
0.6
0.7
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsve
rse"
Cha
rged
Den
sity
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
PTsum
Nchg
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Tune Z1
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 23
Energy DependenceEnergy Dependence
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.
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 for 5.0 < PTmax < 6.0 GeV/c.
"Transverse" Charged Particle AvePT
0.6
0.8
1.0
1.2
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Ave
PT (G
eV/c
)
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV900 GeV
"Transverse" Charged Particle AvePT
0.85
0.90
0.95
1.00
1.05
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsve
rse"
Ave
PT (G
eV/c
)
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
"Transverse" Charged Particle AvePT
0.85
0.90
0.95
1.00
1.05
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsve
rse"
Ave
PT (G
eV/c
)
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Tune Z1
"Transverse" Charged Particle AvePT
0.6
0.8
1.0
1.2
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Ave
PT (G
eV/c
) 1.96 TeV
300 GeV900 GeV
Charged Particles (||<1.0, PT>0.5 GeV/c)
PYTHIA Tune Z1
CDF Preliminary Corrected Data
Tune Z1 Generator Level
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 24
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/dd, 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/dd, 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/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
"Transverse" Charged Particle Density: dN/dd
1.0
2.0
3.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Rat
io
CDF Preliminary Corrected Data Ratio
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 300 GeV
"Transverse" Charged Particle Density: dN/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
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
"Transverse" Charged Particle Density: dN/dd
1.0
2.0
3.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Rat
io
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
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 25
Energy Ratio: 900/300Energy Ratio: 900/300
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged particle density, dN/dd, 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 900 GeV on the “transverse” charged particle density, dN/dd, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0. Shows 900 GeV divided by 300 GeV.
"Transverse" Charged Particle Density: dN/dd
1.0
1.5
2.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Rat
io
CDF Preliminary Corrected Data Ratio
Charged Particles (||<1.0, PT>0.5 GeV/c)
900 GeV divided by 300 GeV
"Transverse" Charged Particle Density: dN/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
"Transverse" Charged Particle Density: dN/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
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
"Transverse" Charged Particle Density: dN/dd
1.0
1.5
2.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Rat
io
Charged Particles (||<1.0, PT>0.5 GeV/c)
900 GeV divided by 300 GeV
CDF Preliminary Corrected Data
Tune Z1 Generator LevelTune Z1
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 26
Energy Ratio: 1960/900Energy Ratio: 1960/900
New Corrected CDF data at 300 GeV, 900 GeV, and 1.96 TeV on the “transverse” charged particle density, dN/dd, 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 900 GeV and 1.96 TeV on the “transverse” charged particle density, dN/dd, 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 900 GeV.
"Transverse" Charged Particle Density: dN/dd
1.0
1.2
1.4
1.6
0 5 10 15 20 25
PTmax (GeV/c)
Rat
io
CDF Preliminary Corrected Data Ratio
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 900 GeV
"Transverse" Charged Particle Density: dN/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
Den
sity
CDF Preliminary Corrected Data
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
"Transverse" Charged Particle Density: dN/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
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
"Transverse" Charged Particle Density: dN/dd
1.0
1.2
1.4
1.6
0 5 10 15 20 25
PTmax (GeV/c)
Rat
io
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 900 GeV
CDF Preliminary Corrected Data
Tune Z1 Generator LevelTune Z1
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 27
PYTHIA 6.4 Tune Z1PYTHIA 6.4 Tune Z1"Transverse" Charged Particle Density: dN/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
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/dd
0.25
0.35
0.45
0.55
0.65
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsve
rse"
Cha
rged
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/dd
1.0
2.0
3.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Rat
io
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/dd
1.0
1.5
2.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Rat
io
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/dd
1.0
1.2
1.4
1.6
0 5 10 15 20 25
PTmax (GeV/c)
Rat
io
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 900 GeV
CDF Preliminary Corrected Data
Tune Z1 Generator LevelTune Z1
"Transverse" Charged Particle Density: dN/dd
0.0
0.4
0.8
1.2
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Cha
rged
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
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 28
PYTHIA 6.4 Tune Z1PYTHIA 6.4 Tune Z1"Transverse" Charged PTsum Density: dPT/dd
0.0
0.3
0.6
0.9
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
PTs
um D
ensi
ty (G
eV/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
"Transverse" Charged PTsum Density: dPT/dd
0.2
0.3
0.4
0.5
0.6
0.7
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsve
rse"
PTs
um D
ensi
ty (G
eV/c
)
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Tune Z1
"Transverse" Charged PTsum Density: dPT/dd
1.0
2.0
3.0
4.0
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Rat
io
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 300 GeV
CDF Preliminary Corrected Data
Tune Z1 Generator LevelTune Z1
"Transverse" Charged PTsum Density: dPT/dd
1.0
1.5
2.0
2.5
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Rat
io
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 PTsum Density: dPT/dd
1.0
1.2
1.4
1.6
1.8
0 5 10 15 20 25
PTmax (GeV/c)
Rat
io
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 900 GeV
CDF Preliminary Corrected Data
Tune Z1 Generator LevelTune Z1
"Transverse" Charged PTsum Density: dPT/dd
0.0
0.5
1.0
1.5
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
PTs
um D
ensi
ty (G
eV/c
)
Charged Particles (PT>0.5 GeV/c)
1.96 TeV
300 GeV
900 GeV
PYTHIA Tune Z1
CDF Preliminary Corrected Data
Tune Z1 Generator Level 7 TeV
CDF
CDF
CDF
ALICE
ATLASCMS
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 29
PYTHIA 6.4 Tune Z1PYTHIA 6.4 Tune Z1"Transverse" Charged Particle AvePT
0.6
0.8
1.0
1.2
0 5 10 15 20 25 30 35
PTmax (GeV/c)
"Tra
nsve
rse"
Ave
PT (G
eV/c
) 1.96 TeV
300 GeV900 GeV
Charged Particles (||<1.0, PT>0.5 GeV/c)
PYTHIA Tune Z1
CDF Preliminary Corrected Data
Tune Z1 Generator Level
"Transverse" Charged Particle AvePT
0.85
0.90
0.95
1.00
1.05
0.1 1.0 10.0
Center-of-Mass Energy (TeV)
"Tra
nsve
rse"
Ave
PT (G
eV/c
)
Charged Particles (||<1.0, PT>0.5 GeV/c)
5.0 < PTmax < 6.0 GeV/c
CDF Preliminary Corrected Data
Tune Z1 Generator Level
Tune Z1
"Transverse" Charged Particle AvePT
0.8
1.0
1.2
1.4
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Rat
io
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 300 GeV
CDF Preliminary Corrected Data
Tune Z1 Generator LevelTune Z1
"Transverse" Charged Particle Average PT
0.8
1.0
1.2
1.4
0 2 4 6 8 10 12 14
PTmax (GeV/c)
Rat
io
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 Average PT
0.8
1.0
1.2
1.4
0 5 10 15 20 25
PTmax (GeV/c)
Rat
io
Charged Particles (||<1.0, PT>0.5 GeV/c)
1.96 TeV divided by 900 GeV
CDF Preliminary Corrected Data
Tune Z1 Generator LevelTune Z1
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 30
New CDF MB DataNew CDF MB DataPseudo-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
Ave
rage
Num
ber
1.96 TeV
300 GeV
900 GeV
CDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
At least 1 charged particle
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 > 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.
Pseudo-Rapidity Distribution: dN/d
1.5
2.0
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RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
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CMS
Pseudo-Rapidity Distribution: dN/d
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300 GeV
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RDF Preliminary Corrected Data
Charged Particles (||<0.8, PT>0.5 GeV/c)
At least 1 charged particle
7 TeV
Tune Z1
CDF
CDFCDF
CMS
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 31
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.
Pseudo-Rapidity Distribution: dN/d
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CDF Preliminary Corrected Data
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Pseudo-Rapidity Distribution: dN/d
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particle
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Pseudo-Rapidity Distribution: dN/d
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Charged Particles (||<0.8, PT>1.0 GeV/c)
At least 1 charged particle
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Tune Z1
CDF
CDFCDF
CMS
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 32
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.
Pseudo-Rapidity Distribution: dN/d(=0)
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CDF black dotsCMS red squares
Pseudo-Rapidity Distribution: dN/d(=0)
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Charged Particles (||<0.8, PT>0.5 GeV/c)
At least 1 charged particle
Tune Z1
CDF black dotsCMS red squares
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 33
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.
Pseudo-Rapidity Distribution: dN/d(=0)
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Center-of-Mass Energy (GeV)
Ave
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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
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 34
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.
Pseudo-Rapidity Distribution: dN/d
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Charged Particles (||<0.8, PT>0.5 GeV/c)
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CMSATLAS ALICE
Pseudo-Rapidity Distribution: dN/d
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At least 1 charged particle
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CMS ATLASALICE
MPI@TAU 2012 Tel Aviv, October 15, 2012
Rick Field – Florida/CDF/CMS Page 35
PTmax versus Leading JetPTmax versus Leading Jet"Transverse" Charged Particle Density: dN/dd
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CDF PublishedCorrected Data
PYTHIA Tune Z1
Published CDF Run 2 data at 1.96 TeV on the “transverse” charged particle density, dN/dd, as defined by the leading calorimeter jet (jet#1) for charged particles with pT > 0.5 GeV/c and || < 1.0 compared with PYTHIA Tune Z1.
"Transverse" Charged Particle Density: dN/dd
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PTmax (GeV/c)
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Charged Particles (||<1.0, PT>0.5 GeV/c)
CDF PreliminaryCorrected Data
Tune Z1 generator level
1.96 TeV
PYTHIA Tune Z1
New CDF data 1.96 TeV on the “transverse” charged particle density, dN/dd, as defined by the leading charged particle (PTmax) for charged particles with pT > 0.5 GeV/c and || < 1.0 compared with PYTHIA Tune Z1.
Yikes!???
"Transverse" Charged Particle Density: dN/dd
0.0
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PTmax or PT(jet#1) (GeV/c)
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Charged Particles (||<1.0, PT>0.5 GeV/c)
Leading JetPTmax 1.96 TeV
CDF PreliminaryCorrected Data
PYTHIA Tune Z1
"Transverse" Charged Particle Density: dN/dd
0.0
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Charged Particles (||<1.0, PT>0.5 GeV/c)
Leading Jet
PTmax
1.96 TeV
CDF PreliminaryCorrected Data
PYTHIA Tune Z1
"Transverse" Charged Particle Density: dN/dd
0.0
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0 5 10 15 20 25 30 35 40
PTmax or PT(jet#1) (GeV/c)
"Tra
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Den
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Charged Particles (||<1.0, PT>0.5 GeV/c) Leading Jet
PTmax
1.96 TeV
CDF PreliminaryCorrected Data
PYTHIA Tune Z1
OkayNo inconsistency
But need to understand!
MPI@TAU 2012 Tel Aviv, October 15, 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: Must 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.
Soon we will 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!