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Rick Field University of Florida

MB&UE Working Group Meeting. June 17, 2011. Common Plots & UE Comparisons. CMS. Rick Field University of Florida. Outline of Talk. ATLAS. CMS-ATLAS-ALICE MB Common Plots: Update on the “min-bias” common plots. New results since the last meeting.

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Rick Field University of Florida

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  1. MB&UE Working Group Meeting June 17, 2011 Common Plots & UE Comparisons CMS Rick Field University of Florida Outline of Talk ATLAS • CMS-ATLAS-ALICE MB Common Plots:Update on the “min-bias” common plots. New results since the last meeting. • CMS-ATLAS-ALICE (corrected) UE dataat (900 GeV and 7 TeV) and comparisons with some of the LHC tunes. Update on the UE common plots and new results since the last meeting. UE&MB@CMS Rick Field – Florida/CDF/CMS

  2. MB Common Plots 900 GeV Last UE&MB Meeting Direct charged particles (including leptons) corrected to the particle level with no corrections for SD or DD. Rick Field – Florida/CDF/CMS

  3. MB Common Plots 7 TeV Last UE&MB Meeting Direct charged particles (including leptons) corrected to the particle level with no corrections for SD or DD. Rick Field – Florida/CDF/CMS

  4. New ALICE Common Plots Rick Field – Florida/CDF/CMS

  5. MB Common Plots 7 TeV New Thanks to ATLAS for the data! Thanks to Regina for the plots! Direct charged particles (including leptons) corrected to the particle level with no corrections for SD or DD. Rick Field – Florida/CDF/CMS

  6. Other Comparisons Thanks to Regina for the plot! Direct charged particles (including leptons) corrected to the particle level with no correction for SD or DD. Rick Field – Florida/CDF/CMS

  7. ALICE Common Plots Rick Field – Florida/CDF/CMS

  8. CMS Common Plots Direct charged particles (including leptons) corrected to the particle level with no corrections for SD or DD. Rick Field – Florida/CDF/CMS

  9. PYTHIA 6.4.25 --------------------------------------------------------------------- 4th generation: tunes incorporating 7-TeV data --------------------------------------------------------------------- 340 AMBT1 : 1st ATLAS tune incl 7 TeV, w. LO* PDFs (2010) 341 Z1 : Retune of AMBT1 by Field w CTEQ5L PDFs (2010) 342 Z1-LEP : Retune of Z1 by Skands w CTEQ5L PDFs (2010) 343 Z2 : Retune of Z1 by Field w CTEQ6L1 PDFs (2010) 344 Z2-LEP : Retune of Z1 by Skands w CTEQ6L1 PDFs (2010) 350 Perugia 2011 : Retune of Perugia 2010 incl 7-TeV data (Mar 2011) 351 P2011 radHi : Variation with alphaS(pT/2) 352 P2011 radLo : Variation with alphaS(2pT) 353 P2011 mpiHi : Variation with more semi-hard MPI 354 P2011 noCR : Variation without color reconnections355 P2011 LO** : Perugia 2011 using MSTW LO** PDFs (Mar 2011)356 P2011 C6 : Perugia 2011 using CTEQ6L1 PDFs (Mar 2011) 357 P2011 T16 : Variation with PARP(90)=0.16 away from 7 TeV 358 P2011 T32 : Variation with PARP(90)=0.32 awat from 7 TeV 359 P2011 TeV : Perugia 2011 optimized for Tevatron (Mar 2011) 360 S Global : Schulz-Skands Global fit (Mar 2011) 361 S 7000 : Schulz-Skands at 7000 GeV (Mar 2011) 362 S 1960 : Schulz-Skands at 1960 GeV (Mar 2011) 363 S 1800 : Schulz-Skands at 1800 GeV (Mar 2011) 364 S 900 : Schulz-Skands at 900 GeV (Mar 2011) 365 S 630 : Schulz-Skands at 630 GeV (Mar 2011) ========================================================= PYTUNE Tune Z1 CTEQ5L Tune Z2 CTEQ6L Tune S350 CTEQ5L Tune S356 CTEQ6L Rick Field – Florida/CDF/CMS

  10. PYTHIA 8 Tunes R. Corke and T. Sjöstrand CTEQ6L MRST LO** CTEQ6L PT0 = PARP(82) e = PARP(90) Tevatron LHC pT0(W)=pT0(W/W0)e e = PARP(90) pT0 = PARP(82) W = Ecm Rick Field – Florida/CDF/CMS

  11. CMS UE Data New CMS CMS Tune Z1 Tune Z1 • CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged PTsum density, dPT/dhdf, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2.0. 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/dhdf, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2.0. The data are corrected and compared with PYTHIA Tune Z1 at the generator level. CMS corrected data! CMS corrected data! Very nice agreement! Rick Field – Florida/CDF/CMS

  12. PYTHIA 6.4 Tune Z2 Tune Z2 Tune Z2 • CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged PTsum density, dPT/dhdf, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2.0. The data are corrected and compared with PYTHIA Tune Z2 at the generator level. • CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged particle density, dN/dhdf, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2.0. The data are corrected and compared with PYTHIA Tune Z2 at the generator level. CMS corrected data! CMS corrected data! Not good! Bad energy dependence! Rick Field – Florida/CDF/CMS

  13. PYTHIA 8 Tune C4 PY8 Tune C4 PY8 Tune C4 • CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged PTsum density, dPT/dhdf, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2.0. The data are corrected and compared with PYTHIA 8 Tune C4 at the generator level. • CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged particle density, dN/dhdf, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2.0. The data are corrected and compared with PYTHIA 8 Tune C4 at the generator level. CMS corrected data! CMS corrected data! Not good! PTsum too small! Rick Field – Florida/CDF/CMS

  14. Transverse Ratio: PTsum/Nchg Tune Z2 Tune Z1 • CMS preliminary data at 900 GeV and 7 TeV on the “transverse” ratio PTsum/Nchg as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2.0 compared with PYTHIA Tune Z1, Z2, and PY8C4 at the generator level. PY8 Tune C4 Z1 good! PY8C4 and Z2 Bad! Rick Field – Florida/CDF/CMS

  15. Energy Dependence CTEQ6L: PARP(90) = 0.19 CTEQ5L: PARP(90) =0.275 CTEQ6L: PARP(90) =0.275 • CMS data on the energy dependence (7 TeV divided by 900 GeV) of the “transverse” charged PTsum density as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2.0 compared with PYTHIA Tune Z1, Z2, and PY8C4 at the generator level. • CMS data on the energy dependence (7 TeV divided by 900 GeV) of the “transverse” charged particle density as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2.0 compared with PYTHIA Tune Z1, Z2, and PY8C4 at the generator level. CMS corrected data! CMS corrected data! Duh! The energy dependence depends on both PARP(90) and the structure function! Z1 and PY8C4 good! Z2 Bad! Rick Field – Florida/CDF/CMS

  16. ATLAS UE Data ATLAS ATLAS Tune Z1 Tune Z1 • ATLAS published data at 900 GeV and 7 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| < 2.5. The data are corrected and compared with PYTHIA Tune Z1 at the generator level. • ATLAS published data at 900 GeV and 7 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| < 2.5. The data are corrected and compared with PYTHIA Tune Z1 at the generrator level. ATLAS publication – arXiv:1012.0791 December 3, 2010 Rick Field – Florida/CDF/CMS

  17. ATLAS UE Data ATLAS ATLAS • ATLAS published data at 900 GeV and 7 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| < 2.5. The data are corrected and compared with PYTHIA Tune Z1, Tune S350, and Tune S356 at the generator level. • ATLAS published data at 900 GeV and 7 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| < 2.5. The data are corrected and compared with PYTHIA Tune Z1, Tune S350, and Tune S356 at the generrator level. Very similar to Tune Z1! Tune S350 & S356 (Perugia 2011) fit the UE data at 900 GeV & 7 TeV very well! Rick Field – Florida/CDF/CMS

  18. CMS-ATLAS UE Data CMS: Chgjet#1 Tune Z1 Tune Z1 ATLAS: PTmax • CMS preliminary data at 7 TeV on the “transverse” charged particle density, dN/dhdf, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2.0 together with the ATLAS published data at 7 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| < 2.5 The data are corrected and compared with PYTHIA Tune Z1 at the generator level. Amazing agreement! Rick Field – Florida/CDF/CMS

  19. ATLAS UE Data Tune Z1 Tune Z1 ATLAS ATLAS • ATLAS published data at 7 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 pT > 0.1 GeV/c (|h| < 2.5). The data are corrected and compared with PYTHIA Tune Z1 at the generator level. • ATLAS published data at 7 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 pT > 0.1 GeV/c (|h| < 2.5). The data are corrected and compared with PYTHIA Tune Z1 at the generator level. Here Tune S350 & S356 (Perugia 2011) are identical with Tune Z1! ATLAS publication – arXiv:1012.0791 December 3, 2010 Rick Field – Florida/CDF/CMS

  20. ALICE UE Data ALICE ALICE Tune Z1 Tune Z1 • ALICE preliminary data at 900 GeV and 7 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| < 0.8. The data are corrected and compared with PYTHIA Tune Z1 at the generator level. • ALICE preliminary data at 900 GeV and 7 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| < 0.8. The data are corrected and compared with PYTHIA Tune Z1 at the generrator level. ALICE UE Data: Talk by S. Vallero MPI@LHC 2010 Glasgow, Scotland November 30, 2010 I read the points off with a ruler! Rick Field – Florida/CDF/CMS

  21. ATLAS UE Data ATLAS ATLAS Tune Z1 Tune Z1 • ATLAS preliminary data at 900 GeV and 7 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| < 0.8. The data are corrected and compared with PYTHIA Tune Z1 at the generrator level. • ATLAS preliminary data at 900 GeV and 7 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| < 0.8. The data are corrected and compared with PYTHIA Tune Z1 at the generator level. ATLAS-CONF-2011-009 February 21, 2011 Rick Field – Florida/CDF/CMS

  22. ALICE-ATLAS UE ALICE ATLAS Tune Z1 Tune Z1 • ALICE preliminary data at 900 GeV and 7 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| < 0.8. The data are corrected and compared with PYTHIA Tune Z1 at the generator level. • ATLAS preliminary data at 900 GeV and 7 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| < 0.8. The data are corrected and compared with PYTHIA Tune Z1 at the generrator level. Rick Field – Florida/CDF/CMS

  23. ALICE-ATLAS UE ALICE ATLAS Tune Z1 Tune Z1 • ALICE preliminary data at 900 GeV and 7 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| < 0.8. The data are corrected and compared with PYTHIA Tune Z1 at the generator level. • ATLAS preliminary data at 900 GeV and 7 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| < 0.8. The data are corrected and compared with PYTHIA Tune Z1 at the generrator level. Rick Field – Florida/CDF/CMS

  24. ALICE-ATLAS UE Rick Field – Florida/CDF/CMS

  25. PYTHIA Tune Z1 Oops Tune Z1 is slightly high at CDF! Tune Z1 CMS CDF Tune Z1 • CMS preliminary data at 900 GeV and 7 TeV on the “transverse” charged particle density, dN/dhdf, as defined by the leading charged particle jet (chgjet#1) for charged particles with pT > 0.5 GeV/c and |h| < 2. The data are uncorrected and compared with PYTHIA Tune Z1 after detector simulation. • CDF published data at 1.96 TeV on the “transverse” charged particle density, dN/dhdf, as defined by the leading calorimeter jet (jet#1) for charged particles with pT > 0.5 GeV/c and |h| < 1.0. The data are corrected and compared with PYTHIA Tune Z1 at the generator level. Rick Field – Florida/CDF/CMS

  26. PYTHIA Tune Z1 pT0(W)=pT0(W/W0)e • MPI Cut-Off versus the Center-of Mass Energy Wcm: PYTHIA Tune Z1 was determined by fitting pT0 independently at 900 GeV and 7 TeV and calculating e = PARP(90). The best fit to pT0 at CDF is slightly higher than the Tune Z1 curve. This is very preliminary! Perhaps with a global fit to all three energies (i.e. “Professor” tune) one can get a simultaneous fit to all three?? pT0(W)=pT0(W/W0)e e = PARP(90) pT0 = PARP(82) W = Ecm Rick Field – Florida/CDF/CMS

  27. PYTHIA 8 Tunes R. Corke and T. Sjöstrand CTEQ6L MRST LO** CTEQ6L PT0 = PARP(82) e = PARP(90) Tevatron LHC pT0(W)=pT0(W/W0)e e = PARP(90) pT0 = PARP(82) W = Ecm Rick Field – Florida/CDF/CMS

  28. UE Summary & Conclusions • We now have lots of corrected UE data from the LHC! Tune Z1 (CTEQ5L) does nice job of fitting the CMS, ATLAS, and ALICE UE data at 900 GeV and 7 TeV! But Tune Z1 is a little high at CDF (1.96 TeV)! Tune S350 (Perugia 2011) is very similar to Tune Z1 (i.e. just as good on the UE). • CTEQ6L Tune: PYTHIA 6.4 Tune Z2 and PYTHIA 8 Tune C4 both use CTEQ6L, but do not fit the LHC UE data as well as Tune Z1. Tune S356 (Perugia 2011) is the best CTEQ6L tune so far! • Next Step: More PYTHIA 6.4 and PYTHIA 8 tunes. Time to look more closely at Sherpa and HERWIG++! CMS GEN Group: Working on an improved Z2 tune (Tune Z2*) and an improved PY8C4 tune (Tune C4*) using the Professor (A. Knutsson & M. Zakaria). Sorry not enough time to show all the LHC tunes! • ATLAS Tuning Effort (A. Buckley, J. Katzy et al.): AMBT1, AUET1 (Herwig+Jimmy). Coming soon AUET2 (Herwig + Jimmy), AMBT2! Four stage approach: Flavor, FS fragmentation, ISR, MPI. Rick Field – Florida/CDF/CMS

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