analisi/cmsnotes(+nim) dei muoni previste per i dati craft
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Analisi/CMSnotes(+NIM) dei muoni previste per i dati CRAFT. M.C.Fouz DPG 5/2/09. Overview:. Vdrift. CMSnote 2008/001. CRAFT. M.C.Fouz DT-DPG 4/12/08. Towards a CMS note on CRAFT results from DT Local Muon Reco…. “draft0” on:. http://www.pd.infn.it/~ugs/temp/CRAFT/NoteLocalReco/. - PowerPoint PPT PresentationTRANSCRIPT
9/2/2009 Pd/sw-analysis meeting 1
Analisi/CMSnotes(+NIM) dei muoni previste per i dati CRAFT
M.C.FouzDPG 5/2/09
9/2/2009 Pd/sw-analysis meeting 2
Overview:
9/2/2009 Pd/sw-analysis meeting 3
Vdrift
CMSnote2008/001
M.C.Fouz DT-DPG 4/12/08
CRAFT
9/2/2009 Pd/sw-analysis meeting 4
Towards a CMS note on CRAFT
results from DT Local Muon Reco…
http://www.pd.infn.it/~ugs/temp/CRAFT/NoteLocalReco/
“draft0” on:
9/2/2009 Pd/sw-analysis meeting 5
Intro
-We have plenty of good data and (preliminary/partial) results from the full DT detector, operating highly efficiently for ~1 month of CRAFT operations
- working on a “Reconstruction results” paper may help also on focusing on problems, refining algorithms/ procedures, improving calibration/alignemnts… in one word , preparing ourselves at best for pp data taking - NOT a “chamber performance” paper (at least in my view…there may well be one other paper (or more than one) on this, of course); focus here is on reconstruction of the “building blocks” of a muon track
-May be merged at the end with content of another note on global muon reco results, for an external (e.g. NIM) publication
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Local Reco note: proposed layout1. Intro CRAFT description & motivation, general operations…2. DT setup, conditions, triggers…3. Local Reco algorithms short remind, reference to existing notes (one is ongoing).4. Calibration needed for “1st level rechits”, which are input to pattern recognition; ttrigg results, stability (there may be some overlap with vdrift note)5. Results rechit level: 1st level 2nd level with t0 refit final resolutions segments & their correlations: alignment issues, measurement of bending capability, mult. scattering effects ; (dedicated note on showering )
In following slide a few example of material…
(+ some attempt to propose work to interested persons…)
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1. From times to rechits: Ttrigg
Stability & uniformity
M.C.Fouz,CRAFT jamboree 11/12/08
Maselli/Cerminara(old plot on CRUZET data)
Silvia/Sarato provide material/text forthis paragraph ?
9/2/2009 Pd/sw-analysis meeting 8
2. Rec Hits
dataMC
**Before** t0 fit:input to pattern recognition/segment building
Example: YB0 sect 4
**ju
st a
dra
ft ex
ampl
e**
All chambers
should be240 chambers(- a few switched off)
likely to come frominclined sectors…verify calibration there…
Gianluca,Stefano L.
9/2/2009 Pd/sw-analysis meeting 9
Cell efficiency & RecHits
M.C.Fouz,CRAFT jamboree Nov ‘08
On MC, we have this…(“Local muon Reco in DT”,CMS note in preparation):
Can we do the same on data ?(replacing dsim with dextrap.)
Well establishedprocedure for cell efficiency Computation since chamber commissioningShow overall results (in termsof cell efficiency averaged on a SL)
Francesca?
May affect hit multiplicityIn segments; we do seedifferences w.r.t. simulations(see below)
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t0 fit
Anna M.CRAFT meeting4/12/08
T0 correlation between chambers,TOF measurements….
Anna
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Hit residuals: YB-2, Sect 4
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Fit results in all chambers
**ju
st a
dra
ft ex
ampl
e**
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Segments: associated Hit multiplicities
local angle directions:Data-MC comparison maybe crucially dependent ontrigger assumptions/selections…
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Segments: efficiencies
-Using interpolations between neighbouring stations Santolalla
- Using extrapolation from tracker
A.Branca, P.BellanF.Cavallo
MB1
MB3
MB2
MB4
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Angle correlations: Dphi @ B=0, alignment issues
Run70675(end of CRAFT: 11/11/2008 ) Run66475
(begin of CRAFT: 16/10/2008 )
Alicia, Ugo
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Dphi fits, all stations
differenceRun70675- Run66475
Run70675
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Bending MB1-MB2
discuss alsomult. scattering evolution…is it what we expect frommaterial, p,…
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Bending:MB2-MB3 MB1-MB4
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Altre note:
-Specifici layout dei contenuti non ancora presentati
-Prossimi step: DTDPG 12/2/09
Muon Barrel workshop CERN 16-17 Febbraio: first review
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AoB: B field studies
Alicia/Ugo
Method: bending between consecutive stations (using pT from Tracker):
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B field (II)
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B field studies (III)Francesca/Anna
pT (Tracker)
Method: extraplation from Tracker
Average of residuals of XmeasDT-Xextrap (cm):
noteasymmetry
MB4MB3MB2MB1
upper sectors
lower sectors
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AoB: alignment
- Study geometry of MBn station extrapolating good quality segments originating from a defined (relatively small region: ~ a few DT cells long) in MBn-1
- Study residuals of segments in MBn w.r.t. extrapolations, as a function of local position in MBn
MBn
MBn-1
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Alignment (II)MB2, MB3 & MB4 chambers in Sect.4, all wheels:
YB-2YB-1YB0YB+1YB+2
MB2 MB4MB3
**before** SL corrections
9/2/2009 Pd/sw-analysis meeting 25
Alignment (III)
these looks like rigidrelative displacements(O(~1 mm))between chambersin same sector
YB-2YB-1YB0YB+1YB+2
** after** SL corrections