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TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 1 TeV4LHC Workshop Rick Field University of Florida CDF Run 2 Talk #1.

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Presentation on theme: "TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 1 TeV4LHC Workshop Rick Field University of Florida CDF Run 2 Talk #1."— Presentation transcript:

1 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 1 TeV4LHC Workshop Rick Field University of Florida CDF Run 2 Talk #1

2 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 2 CDF Run 2 Monte Carlo Tunes Outline of Talk  P T (Z-boson): Tuning to fit the P T (Z) distribution.  Jet Production: Tuning to fit the “underlying event” is high P T jet production.  Energy: Tuning to fit the energy in the “underlying event”.  Drell-Yan: Tuning to fit the “underlying event” in Drell-Yan production. CDF Run 2 Tunes PYTHIA Tune A PYTHIA Tune A25 PYTHIA Tune A50 PYTHIA Tune AW PYTHIA Tune Q PYTHIA Tune QW JIMMY Default JIMMY 325

3 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 3 CDF Run 1 P T (Z)  Shows the Run 1 Z-boson p T distribution ( ≈ 11.5 GeV/c) compared with PYTHIA Tune A ( = 9.7 GeV/c), Tune A25 ( = 10.1 GeV/c), and Tune A50 ( = 11.2 GeV/c). ParameterTune A Tune A25 Tune A50 MSTP(81)111 MSTP(82)444 PARP(82)2.0 GeV PARP(83)0.5 PARP(84)0.4 PARP(85)0.9 PARP(86)0.95 PARP(89)1.8 TeV PARP(90)0.25 PARP(67)4.0 MSTP(91)111 PARP(91)1.02.55.0 PARP(93)5.015.025.0 UE Parameters ISR Parameter Intrensic KT PYTHIA 6.2 CTEQ5L

4 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 4 CDF Run 1 P T (Z)  Shows the Run 1 Z-boson p T distribution ( ≈ 11.5 GeV/c) compared with PYTHIA Tune A ( = 9.7 GeV/c), Tune A25 ( = 10.1 GeV/c), and Tune A50 ( = 11.2 GeV/c). ParameterTune A Tune A25 Tune A50 MSTP(81)111 MSTP(82)444 PARP(82)2.0 GeV PARP(83)0.5 PARP(84)0.4 PARP(85)0.9 PARP(86)0.95 PARP(89)1.8 TeV PARP(90)0.25 PARP(67)4.0 MSTP(91)111 PARP(91)1.02.55.0 PARP(93)5.015.025.0 UE Parameters ISR Parameter Intrensic KT High p T shape agrees! PYTHIA 6.2 CTEQ5L

5 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 5 ParameterTune ATune AW MSTP(81)11 MSTP(82)44 PARP(82)2.0 GeV PARP(83)0.5 PARP(84)0.4 PARP(85)0.9 PARP(86)0.95 PARP(89)1.8 TeV PARP(90)0.25 PARP(62)1.01.25 PARP(64)1.00.2 PARP(67)4.0 MSTP(91)11 PARP(91)1.02.1 PARP(93)5.015.0 The Q 2 = k T 2 in  s for space-like showers is scaled by PARP(64)! Effective Q cut-off, below which space-like showers are not evolved. CDF Run 1 P T (Z)  Shows the Run 1 Z-boson p T distribution ( ≈ 11.5 GeV/c) compared with PYTHIA Tune AW ( = 11.7 GeV/c). UE Parameters ISR Parameters Intrensic KT PYTHIA 6.2 CTEQ5L

6 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 6 CDF Run 1 P T (Z)  Shows the Run 1 Z-boson p T distribution ( ≈ 11.5 GeV/c) compared with PYTHIA Tune AW ( = 11.7 GeV/c). ParameterTune ATune AW MSTP(81)11 MSTP(82)44 PARP(82)2.0 GeV PARP(83)0.5 PARP(84)0.4 PARP(85)0.9 PARP(86)0.95 PARP(89)1.8 TeV PARP(90)0.25 PARP(62)1.01.25 PARP(64)1.00.2 PARP(67)4.0 MSTP(91)11 PARP(91)1.02.1 PARP(93)5.015.0 UE Parameters ISR Parameters Intrensic KT PYTHIA 6.2 CTEQ5L

7 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 7 CDF Run 1 P T (Z)  Shows the Run 1 Z-boson p T distribution ( ≈ 11.5 GeV/c) compared with PYTHIA Tune AW ( = 11.7 GeV/c) and PYTHIA Tune A25 ( = 10.1 GeV/c). ParameterTune A25Tune AW MSTP(81)11 MSTP(82)44 PARP(82)2.0 GeV PARP(83)0.5 PARP(84)0.4 PARP(85)0.9 PARP(86)0.95 PARP(89)1.8 TeV PARP(90)0.25 PARP(62)1.01.25 PARP(64)1.00.2 PARP(67)4.0 MSTP(91)11 PARP(91)2.52.1 PARP(93)5.015.0 UE Parameters ISR Parameters Intrensic KT PYTHIA 6.2 CTEQ5L

8 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 8 CDF Run 1 P T (Z)  Compares PYTHIA Tune AW with PYTHIA Tune A25 (both normalized to one). ParameterTune A25Tune AW MSTP(81)11 MSTP(82)44 PARP(82)2.0 GeV PARP(83)0.5 PARP(84)0.4 PARP(85)0.9 PARP(86)0.95 PARP(89)1.8 TeV PARP(90)0.25 PARP(62)1.01.25 PARP(64)1.00.2 PARP(67)4.0 MSTP(91)11 PARP(91)2.52.1 PARP(93)5.015.0 UE Parameters ISR Parameters Intrensic KT PYTHIA 6.2 CTEQ5L

9 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 9 CDF Run 1 P T (Z)  Compares PYTHIA Tune AW with PYTHIA Tune A25 (normalized to agree at high P T (Z)). ParameterTune A25Tune AW MSTP(81)11 MSTP(82)44 PARP(82)2.0 GeV PARP(83)0.5 PARP(84)0.4 PARP(85)0.9 PARP(86)0.95 PARP(89)1.8 TeV PARP(90)0.25 PARP(62)1.01.25 PARP(64)1.00.2 PARP(67)4.0 MSTP(91)11 PARP(91)2.52.1 PARP(93)5.015.0 UE Parameters ISR Parameters Intrensic KT PYTHIA 6.2 CTEQ5L

10 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 10 Z-boson region Run 2 Drell-Yan  Shows the lepton-pair average P T versus the lepton-pair invariant mass at 1.96 TeV for PYTHIA Tune AW and PYTHIA Tune A.  Shows the lepton-pair average P T versus the lepton-pair invariant mass at 1.96 TeV for PYTHIA Tune AW and PYTHIA Tune A5. versus M(pair) Z-boson region

11 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 11 Z-boson region Z-boson region Run 2 Drell-Yan  Shows the charged particle density versus the lepton-pair invariant mass at 1.96 TeV for PYTHIA Tune AW and PYTHIA Tune A.  Shows the charged PTsum density versus the lepton-pair invariant mass at 1.96 TeV for PYTHIA Tune AW and PYTHIA Tune A. versus M(pair) The “Underlying Event”

12 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 12 High P T Drell-Yan The “Underlying Event” in High P T Lepton-Pair Production “Toward” vs P T (pair) 70 < M(lepton-pair) < 110 GeV

13 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 13 High P T Drell-Yan The “Underlying Event” in High P T Lepton-Pair Production “Transverse” vs P T (pair) 70 < M(lepton-pair) < 110 GeV

14 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 14 High P T Drell-Yan The “Underlying Event” in High P T Lepton-Pair Production “Toward” vs “Transverse” 70 < M(lepton-pair) < 110 GeV

15 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 15 Z-boson region High P T Drell-Yan The “Underlying Event” in Lepton-Pair Production “Toward” PTsum Density vs P T (pair) Overall PTsum Density vs M(pair)

16 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 16 High P T Jets The “Underlying Event” in High P T Jet Production “Transverse” vs P T (jet#1)

17 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 17 Drell-Yan vs Jets The “Underlying Event” in High P T Lepton-Pair and Jet Production “Transverse” vs P T (jet#1) “Transverse” vs P T (pair)

18 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 18 CTEQ6.1 Tune ParameterTune QTune QW MSTP(81)11 MSTP(82)44 PARP(82)1.2 GeV PARP(83)0.5 PARP(84)0.4 PARP(85)0.9 PARP(86)0.95 PARP(89)1.8 TeV PARP(90)0.25 PARP(62)1.01.25 PARP(64)1.00.2 PARP(67)4.0 MSTP(91)11 PARP(91)1.02.1 PARP(93)5.015.0 UE Parameters ISR Parameters Intrensic KT PYTHIA 6.2 CTEQ6.1 I used LHAPDF! See the next talk by Craig Group!

19 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 19 JIMMY at CDF The Energy in the “Underlying Event” in High P T Jet Production “Transverse” vs P T (jet#1) JIMMY: MPI J. M. Butterworth J. R. Forshaw M. H. Seymour JIMMY was tuned to fit the energy density in the “transverse” region for “leading jet” events! JIMMY Runs with HERWIG and adds multiple parton interactions! PT(JIM)= 2.5 GeV/c. PT(JIM)= 3.25 GeV/c.

20 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 20 JIMMY at CDF The “Underlying Event” in High P T Jet Production “Transverse” vs P T (jet#1)

21 TeV4LHC - Fermilab October 20, 2005 Rick Field - Florida/CDFPage 21 Summary  PYTHIA Tune Q works as well as Tune A but uses CTEQ6.1! At the Tevatron use Tune QW!  Default JIMMY (PTJIM = 2.5 GeV/c) does not fit the CDF “underlying event” data! Default JIMMY’s “underlying event” is much too active!  We are making good progress in understanding and modeling the “underlying event”. However, we do not yet have a perfect fit to all the features of the “underlying event”. PYTHIA Tune A does not produce enough energy in the “underlying event”! See my talk tomorrow!  PYTHIA Tune AW correctly describes the Z-boson P T distribution and also fits the “underlying event” as well as Tune A does! I do not see anything wrong with it, except that it may only work at the Tevatron. You can not trust the energy dependence!  JIMMY 325 (PTJIM = 3.25 GeV/c) fits the energy in the “underlying event” but does so by producing too many particles (i.e. it is too soft). See my talk tomorrow! Good way to study the “underlying event”!

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