1 / 17

Attivita’ su analisi dati cosmici (“CRAFT”: B=3.8 T & CRUZET(B=0)

Attivita’ su analisi dati cosmici (“CRAFT”: B=3.8 T & CRUZET(B=0). Pd meeting, 10 Nov 2008. A.Branca, A.Calderon, A.Gresele, U.Gasparini, A.Meneguzzo (+ F. Cavallo, Bologna). Contributo alla DT “prompt analysis”. Attivita’ strettamente correlate.

cachet
Download Presentation

Attivita’ su analisi dati cosmici (“CRAFT”: B=3.8 T & CRUZET(B=0)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Attivita’ su analisi dati cosmici(“CRAFT”: B=3.8 T & CRUZET(B=0) Pd meeting, 10 Nov 2008 A.Branca, A.Calderon, A.Gresele, U.Gasparini, A.Meneguzzo (+ F. Cavallo, Bologna) • Contributo alla DT “prompt analysis” Attivita’ strettamente correlate.. - Studio prestazioni della ricostruzione muoni di ‘alto livello’ (tracce muoni globali, matching con Tracker, risoluzione in momento, allineamenti…) - Misura di fisica: rapporto mu+/mu- Prima esperienza di una“end-to-end analysis” (da P5 a Phys.Lett.) in CMS… • - TOF per HSCP (non trattata qui) • Piani e seggerimenti per possibili ulteriori sviluppi

  2. Intro CRAFT: ~300 M trigger collected so far… statistics is not an issue… • while doing a physics • measurement (e.g. • mu+/mu- ratio in cosmics, • differential spectrum, • TeV muons flux…) • may concentrate on • many different aspects of • reconstruction, trigger performance, sources of systematics errors… http: //malgeril.web.cern.ch/ malgeril/coll_stats/collcosm.html examples: - perform different tracks selection, with loose/tight criteria on track topology/quality - study/keep control of momentum resolution, charge identification - Test stability of results against different runs, triggers, detector data quality…

  3. Prompt DT analysis http: //cmsdoc.cern.ch/cms/MUON/dt/sx5/ [ DPG joint effort…] DT detector performance overview More detailed info by wheels

  4. Example of DT-DQM certified good run Run 67838 good DT calibration, DT local trigger efficiency Missing DDU-trigger data in Wheel+1; data available anyway from trigger DCC

  5. DT local reco: reco segments Run 67838, B=3.8 T 12,7 M triggers 12,35 M “good” segments in MB1 (Nhit(rf)>5 & Nhit(rz)=3 or 4)

  6. Muon reco 16,9 Million of Tracks

  7. Example of mu reco performance study:“2 legs” STA muons Run 67838 12.7 M events analyzed (~ 45% of total triggers) cut associated hits to m tracks DT segment multiplicity StandAlone muons 4,1 M with Nlegs=2 1st leg 1,100,000 STA pairs difference in Z-impact parameter Dz, both legs with Nhit>30 |Dz| < 20 cm spT/pT~36% 2nd leg

  8. Control of Mult.scattering & bending B = 3.8 T F(MB4)-F(MB3) B = 0 (CRUZET4) ? F(MB3)-F(MB2) F(MB2)-F(MB1) F(MB4)-F(MB1) ?

  9. Data vs MonteCarlo Hit/segment/track resolution & efficiency to be x-checked with cosmic MontCarlo… - “B ON” RECO production not yet available… - First comparisons performed @ B=0 (CRUZET4 data) … For more detail see e.g. Ambra’s talk @ muon POG, 13/10/08: http://indico.cern.ch/conferenceDisplay.py?confId=42597

  10. 1 leg STA tracks vs Tracker tracks spT/pT~18% spT/pT~22% spT/pT~25% Tracker track 1 leg STA Track, Nhit > 60

  11. Charge identification: 1 leg STA vs Tracker 880 out of 27,700 tracks (3.2%)

  12. Mu+/Mu- ratio http: //indico.cern.ch/conferenceDisplay.py?confId=44067 P.Garcia, CMS Phys.Plenary 6/11/08 Florida, CIEMAT Padova, Bologna More info, today’s talk by Ambra @ Cosmic Muon Analysis meeting: http://indico.cern.ch/conferenceDisplay.py?confId=45080 [ I wish also to advertise Stefano’s talks on reco related topics @ todays’ muon POG http://indico.cern.ch/conferenceDisplay.py?confId=43177 ]

  13. Mu+/mu- ratio: 1st look Using “one leg” STA Tracks with Nhit > 60 unphysical tail… 25,000 tracks (this corresponds to ~3% of total CRAFT statistics) uncorrected for charge mis-identification

  14. Stability of result: another run ( 66783 )

  15. Alignment checks (very preliminary) Alicia No alignment Alignment tag in Official reco

  16. Tools for analysis • CAF (Cern Analysis Facility) almost saturated from processing, • prompt analysis… • Some long good run transferred to Legnaro-T2 • See https://cmsweb.cern.ch/dbs_discovery/ 66615, 66783, 67838

  17. Tools for analysis Analyzer code on: /raid4/data/share/CRAFTanalysis/DAnalyzer.cc Produced rootple on: /raid4/data/share/CRAFTanalysis/rootple Rootples contains: - trigger info (local chamber & DTTF) - DT segment info - muon standalone 2 legs collection - muon standalone 1 leg collection - muon global 2 legs collection - muon global 1 leg collection - Tracker tracks collection

More Related