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News/”highlights” dalla CMSweek

News/”highlights” dalla CMSweek. ( con qualche dettaglio su analisi dei CRAFT data ). U.Gasparini. LHC & CMS. LHC, Evans. “CRAFT”. CMS, Verdee. “on track”, ma con molte cose da fare…. CMS(II). Detectors & Physics. CRAFT. Data vs MC…. Pre-selection: at least 2 “good” DT segments

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News/”highlights” dalla CMSweek

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  1. News/”highlights” dalla CMSweek ( con qualche dettaglio su analisi dei CRAFT data ) U.Gasparini Pd meeting

  2. LHC & CMS LHC, Evans “CRAFT” CMS, Verdee “on track”, ma con molte cose da fare… Pd meeting

  3. CMS(II) Pd meeting

  4. Detectors & Physics Pd meeting

  5. CRAFT Pd meeting

  6. Data vs MC… Pre-selection: at least 2 “good” DT segments both in upper & lower sectors ~4.1% of events with less than 2 STA mu (3.7% in MC) All plots normalized to Nr. of events passing pre-selection Pd meeting

  7. Tracker Efficiency Studies 1) Eff. vspt of the STA muons (|d0| < 50 cm and |dz| < 50 cm) 2) Eff. vsd0 for STA muons (pt > 12 GeV and |dz| < 50 cm) to be understood… Combined Track Finder J.Andrea/ULP Road Search Cosmic Track Finder Efficiency is around 90% not yet the optimal value compared to pp (simulation) Pd meeting

  8. Timing/TOF/HSCP searches Pd meeting

  9. Pt resolution: MC expectations Pt resolution defined as: (1/pTreco-1/pTsim)/(1/pTsim) comparing the innermost state and its closet primary muon simhit we could expect resolutions: cosmic global > 1-leg > 2-leg > lhcSTA* CosmicMCBon10GeV GEN-SIM-RAW sample, reconstruction in 2_1_12 Pd meeting

  10. Momentum scale: 1-leg STA vs Tracker track -0.5 0.5 -0.5 0.5 ~ 0 ~ -12% s=22.7 % Under investigation… requires detailed studies (B field effects? see next slides) s=22.2% resolutions as expected -0.5 0.5 -0.5 0.5 Pd meeting [1/pt(1legSTA) -1/pT(Tracker) ] / (1/pt(Tk)

  11. upper STA-leg vs Tracker track STA upper leg ~ -2% ~ -20% Tracker track Pd meeting [1/pt(1legSTA) -1/pT(Tk) ] / (1/pt(Tk)

  12. lower STA-leg vs Tracker track Tracker track STA lower leg Pd meeting

  13. Momentum scale: back to DT segments B= 3.8 T mean = -19.0± 0.1 mrad mean = -13.4± 0.1 mrad mean = -15.7± 0.1 mrad mean = -21.6± 0.1 mrad Bending angle difference between segments in consecutive stations mean = -13.5± 0.1 mrad mean = -14.2± 0.1 mrad B field in the outermost parts of Iron Yokes seems to be lower (~30%effect) than the current mapping value Pd meeting

  14. Momentum scale (II) B= 0 B= 3.8 T mean=-11.7± 0.1 mrad mean= 0.3 ± 0.1 mrad mean=-8.2± 0.1 mrad mean=-8.9± 0.1 mrad mean=-12.5± 0.1 mrad mean= 0.4 ± 0.1 mrad Width of distribution compatible with mult. scattering as observed in B=0 data mean=-8.6± 0.1 mrad mean=-7.6± 0.1 mrad mean= -0.9 ± 0.1 mrad s=5.7 mrad s=5.4 mrad misalignm. effects < 1 mrad Pd meeting

  15. Energy Loss N.Kypreos/UFL Some features in the distributions, some of them understood other need to be studied Pd meeting

  16. Energy Loss (II) • dE/dx as a function of energy @ innermost • Similar curve as HCAL energy-loss vs. muon energy (by Jordan D. & Efe Y.) • Material is more complicated • Whole detector: air, iron, calorimeters, tracker & muon chambers… • MC/Data agrees well at low-energy region • dE (inner E – outer E) vs. dx Distance (inner, outer) • MC/Data shape agree very well • Clear dependence on the path of track • Steps on the curve are because energy loss is less in muon chamber than in iron C.Liu/Purdue Pd meeting

  17. Phi @ IP Z @ IP Theta @ IP Pt(upper)- Pt (down) / Pt (down) Alignment effects A.Calderon Inclusion of muon alignment data slightly improve STA reconstruction: Nominal CRAFT_All_V3 YB+2 SA 2 legs @ IP up to 1.6 mm From 1.2 mrad up to 0.6 mrad From 2.3 mm From 2 mrad up to 0.9 mrad Pd meeting

  18. IEEE-NSS-2008_PID771926 CMSSW map (B(solenoid)=3.8): 1.640 T 1.620 T 1.740 T 3.8 T Pd meeting

  19. Bfield from data r r sin f1 D = 29 cm r sin f2 D= 62 cm f1 D = 62 cm f2 D= r (sinf2 – sinf1) B = pT/ (0.003 r) from tracker + energy loss Pd meeting

  20. B field from data… CMSSW map (B(solenoid)=3.8): 1.640 T 1.620 T 1.740 T B=1.44±.01 B=0.97±.02 ?? issue mu+ vs mu- to be undesrtood… B=1.02±.02 B=1.48±.01 B=1.96±.03 B=1.85±.01 Pd meeting

  21. B field from data (II) Pd meeting

  22. B field from data (III) ?? Pd meeting

  23. Conclusioni… Stiamo (velocemente?) avvicinandoci alla partenza di LHC… un sacco di lavoro da fare per capire i dati nel 2009… p.s.: se qualcuno ha da prestarmi qualche punto della patente (diciamo una decina…) gli offro una cena… Pd meeting

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