mc misalignment
DESCRIPTION
MC Misalignment. George Vesztergombi. Tracker DPG meeting, 25.11.2011. Budapest: Adam Agocs, Krisztian Krajczar, Ferenc Sikler, George Vesztergombi DESY: Joerg Behr, Gero Flucke, Justyna Tomaszewska CERN: Alessio Bonato, Roberto Castello - PowerPoint PPT PresentationTRANSCRIPT
MC Misalignment MC Misalignment
George Vesztergombi
Tracker DPG meeting, 25.11.2011
25.11.11 Budapest Group 2
Credits
Budapest: Adam Agocs, Krisztian Krajczar, Ferenc Sikler, George Vesztergombi
DESY: Joerg Behr, Gero Flucke, Justyna Tomaszewska CERN: Alessio Bonato, Roberto Castello
Aachen: Natalie Heracleous
25.11.11 Budapest Group 3
Intro Latest startup Dec 2010, only cosmics + minbias
Plots from Adam or Natalie?
Z with only IDEAL and Startup geoms
25.11.11 Budapest Group 4
Strategy
Aim: find an alignment (including sensor bow parameters) on MC, which performs close to the current data
alignment Momentum biases as seen with Z-mass validation Local precision as seen with track based validation
Geometry production:
starting from an MC geometry + bow parameters from data
~ similar to data approach
25.11.11 Budapest Group 5
Datasets Input: same datasets as in real data:
Isolated muons from W (16.3 M tracks) Isolated muons from QCD-mu enriched events (2.3 M tracks)
Minbias tracks (450k events ~ 4.5 M tracks) Zmumu events using mass constraint (390k events)
Peak mode cosmics (1.8 M used tracks) Deco mode cosmics (1.7 M used tracks)
Different weights for cosmics (x2, x0.5) → negligible change in the produced geometry
25.11.11 Budapest Group 6
pT and eta distribution in data and MC
25.11.11 Budapest Group 7
List of valid geometries Alignments starting from ideal and startup MC geometries +
bows from data:
The presence of the Z-mass φ-mode seems completely determined by the starting geometry
Roberto produced hybrid geometries which lay between ideal and startup:
Starting from ideal and adding a fraction of the difference from startup
IDEALplus_02Delta IDEALplus_033Delta IDEALplus_05Delta
25.11.11 Budapest Group 8
Realigned bows IDEALplus_05Delta
Kinks and δ-bows
25.11.11 Budapest Group 9
Track based validationDMR – BPIX-x, BPIX-y, FPIX-x, FPIX-y, TEC, TOB
25.11.11 Budapest Group 10
Track based validationDRR – BPIX-x, BPIX-y, FPIX-x, FPIX-y, TEC, TOB
25.11.11 Budapest Group 11
Cosmic splitΔK - ΔΘ
25.11.11 Budapest Group 12
Z validation Mass peak
Plots from Natalie
25.11.11 Budapest Group 13
Z validation
MZ vs η, M
Z vs Φ for all tracker
http://natalie.web.cern.ch/natalie/directory/Tracker_Alignement_Task/111111/All/
25.11.11 Budapest Group 14
Z validation
MZ vs Φ in Barrel, M
Z vs Φ in TEC+
http://natalie.web.cern.ch/natalie/directory/Tracker_Alignement_Task/111111/TEC+/
Barrel
Barrel TEC+
TEC+
25.11.11 Budapest Group 15
Z validation
MZ vs Δη
Plots from Natalie/Roberto?
25.11.11 Budapest Group 16
Chosen geometry The BPIX centred IDEALplus_05Delta is chosen
25.11.11 Budapest Group 17
Geometry comparisons
IDEAL vs IDEALplus_05Delta Centred - BPIX
25.11.11 Budapest Group 18
Geometry comparisonsIDEAL vs IDEALplus_05Delta Centred - TOB
25.11.11 Budapest Group 19
Summary Conclusions
Outlook
25.11.11 Budapest Group 20
Backup slides