School on data combination and limit setting

chaired by Gero Flucke
from to (Europe/Berlin)
at DESY Hamburg ( Seminar room 2 (Building 2a, ground floor) )
Notkestr. 85 22607 Hamburg
Description
The “School on Data Combination and Limit Setting” focuses on two topics of immense importance for the LHC: For many physics analyses, several channels are combined into one result. In a similar way results from different experiments are merged. The aim of this procedure is to increase the precision (in case of measurements of observables) or to arrive at stricter limits in the case of searches for new physics.

The school will introduce the basic concepts for data combination and limit setting and will deepen their understanding with practical examples, both educational and from real physics analyses. Furthermore, relevant tools will be shown. Discussions with experts complete the programme.
Material:
Support Email: anacen@desy.de
Go to day
  • Tuesday, October 4, 2011
    • 12:30 - 13:00 Registration (SR2) 30'
    • 13:00 - 13:10 Welcome 10'
      Speaker: Mr. Gero Flucke (DESY)
      Material: Slides pdf file
    • 13:10 - 13:40 Statistics in LHC Physics Analyses 30'
      Speaker: Dr. Thomas Schoerner-Sadenius (DESY)
      Material: Slides pdf file
    • 13:40 - 14:00 Computer Setup Testing 20'
    • 14:00 - 16:00 Data Combination (Method 1) I 2h0'
      Speakers: Prof. Volker Blobel (Uni HH), Mr. Gero Flucke (DESY)
    • 16:00 - 16:30 Coffee Break
    • 16:30 - 18:30 Data Combination (Method 1) II 2h0'
      Speakers: Prof. Volker Blobel (Uni HH), Mr. Gero Flucke (DESY)
      • Lecture 1h0'
      • Tutorial 1h0'
    • 19:00 - 21:00 Reception ( DESY ( Canteen extension ) )
  • Wednesday, October 5, 2011
    • 09:00 - 10:30 Lecture/Tutorial: Foundations of Limit Setting I 1h30'
      The series of lectures will cover the statistical methods used in searches for new phenomena in a particle physics experiment. Statistical tests will be formally defined and used to quantify the level of agreement between a specified model and the observed data. Specifically, one tries to reject the Standard Model in such a test, as this will indicate the discovery of something new. Even in the absence of a discovery, we would like to say what possible signal models one may exclude by setting limits on their parameters. Several procedures for doing this will be discussed, including CLs, Power-Constrained Limits (PCL), Bayesian, and Feldman-Cousins methods. The lectures will focus on frequentist methods, but the Bayesian approach will be addressed as well. In both cases the role of systematic uncertainties will be emphasized. Computer tutorials will provide a practical exposure to the procedures covered in the lectures. 
      Speaker: Glen Cowan (University of London)
      Material: Slides pdf file
    • 10:30 - 11:00 Coffee Break
    • 11:00 - 12:30 Lecture/Tutorial: Foundations of Limit Setting II 1h30'
      Speaker: Glen Cowan (University of London)
      Material: Slides pdf file
    • 12:30 - 14:00 Lunch
    • 14:00 - 15:30 Lecture/Tutorial: Foundations of Limit Setting III 1h30'
      Speaker: Glen Cowan (University of London)
      Material: Slides pdf file
    • 15:30 - 16:00 Coffee Break
    • 16:00 - 18:00 Lecture/Tutorial: Data Combination (Method 2) I 2h0'
      Speaker: Alexander Glazov (DESY)
      Material: Exercise unknown type file Slides pdf file
  • Thursday, October 6, 2011
    • 09:00 - 10:30 Lecture/Tutorial Introduction to BAT 1h30'
      Speaker: Shabnaz Pashapour (University of Göttingen)
      Material: Slides pdf file tarfile unknown type file
    • 10:30 - 11:00 Coffee Break
    • 11:00 - 12:30 BAT Limit Tutorial I 1h30'
      Speaker: Shabnaz Pashapour (University of Göttingen)
      Material: Online Tutorial link
    • 12:30 - 14:00 Lunch
    • 14:00 - 15:30 BAT Limit Tutorial II 1h30'
      Speaker: Shabnaz Pashapour (University of Göttingen)
    • 15:30 - 16:00 Coffee Break
    • 16:00 - 18:00 BAT Data combination tutorial 2h0'
      Speaker: Ms. Julia Grebenyuk (DESY)
      Material: Link link Slides pdf file
    • 19:00 - 22:00 Dinner ( Main gate )
      Optional, at own cost.
      19:00 Meeting point: DESY main gate. 
      19:30 Dinner reservation at Champus.
  • Friday, October 7, 2011
    • 09:00 - 12:00 Setting Limits: Expert Talks and Discussion
      Conveners: Dr. Olaf Behnke (DESY), Dr. Frank Ellinghaus (University of Mainz)
      • 09:00 Personal View and Perspectives of an ATLAS Expert 1h0'
        Speaker: Glen Cowan (University of London)
        Material: Slides pdf file
      • 10:00 Coffee 30'
      • 10:30 Personal View and Perspectives of a CMS Expert 1h0'
        Speaker: Robert Cousins (University of California, Los Angeles)
        Material: Slides pdf file
      • 11:30 Discussion 30'