Fitting Workshop / School

30 Mar 2009, 12:00 → 1 Apr 2009, 18:00 Europe/Berlin

DESY auditorium (DESY Hamburg)

Claus Kleinwort (DESY), Olaf Behnke (DESY), Stefan Schmitt (DESY), Thomas Schoerner-Sadenius (DESY)

Welcome to the 2009 Terascale Fit workshop/school! Our exciting programme consists of: - general introductory lectures on the topic of fitting - several 2-3 hour session blocks on specific fit topics relevant for analyses at the LHC (and elsewhere): Each block consists of a mixture of short (20 min) mini-lectures and extended practical work in groups of ~20 persons. Please take note: - The school fee is 20 Euro to be paid in cash upon arrival: This includes all nutrition costs (cookies, coffee, dinner, etc.) - Accommodation http://guest-services.desy.de/hostel_in_hamburg. Please book yourself.

Monday, 30 March

12:45 Registration

1 Welcome

Speakers: Dr Olaf Behnke (DESY), Dr Thomas Schoerner-Sadenius (DESY)

Slides karte.pdf obehnke090330.pdf

2 Introductory Lecture on Fitting I

Speaker: Hermann Kolanoski (HU Berlin/DESY Zeuthen)

Slides Fitting_HK_handout.pdf

15:30 Coffee Break

3 Introductory Lecture on Fitting II

Speaker: Hermann Kolanoski (Humboldt-Universität Berlin)

16:40 Coffee Break

4 Getting started with local computers (environment) for practical work

18:00 Welcome Reception

Tuesday, 31 March

5 Mini-lectures and Practical Work I: Linear Least squares fit problems: constant, straight line, parabola & others, physics examples, clever parameter choice, solution by normal equations, parameter errors and correlations, fit quality tests, outlier rejection

Diving into the world of most frequent fit problems: fits of a constant, straight line, parabola, polynom, physics examples, clever choice of parameters, solution by normal equations, parameter errors and correlations, fit quality tests, outlier rejection

Speakers: Igor Rubinsky (Uni HH), Mr Martin Goebel (Uni Hamburg / DESY), Dr Olaf Behnke (DESY), Dr Thomas Schoerner-Sadenius (DESY)

Computer exercises instructions c.pdf

Computer exercises results c_sol.pdf

Root Macros linlsq.tar

Slides l.pdf l_sol.pdf

12:15 Lunch Break

6 Mini-Lectures and Practical Work II: Non-linear fit problems: e.g. fit of signal peak(s) on background, cases of small and large stats., systematic and correlated errors, Poisson vs gaussian approximation, other likelihood estimators

Speakers: Carsten Hensel (Uni Goettingen), Dr Kevin Kroeninger (University of Goettingen)

Exercises and macros fitting.tar.gz

16:45 Coffee and Tea

7 Highlight lecture: Systematic uncertainties in statistical data analysis

Speaker: Glen Cowan (Royal Holloway University of London)

Slides http://physikseminar.desy.de/sites/site_physikseminar/content/e212/e213/e563/e42556/infoboxContent42558/cowan_desy_31mar09.pdf

Wednesday, 1 April

8 Mini-Lectures and Practical Work III: Extended fits with many parameters such as kinematic constraint fits, e.g. ttbar reconstruction

Speakers: Mr Benedikt Mura (Universität Hamburg), Dr Benno List (Uni Hamburg), Dr Christian Sander (University of Hamburg)

document KinFitExercises.tar

Slides 090401_ConstrainedFits.pdf

12:00 Lunch Break

9 Mini lectures and practical work IV: Advanced fitting tool in ROOT (RooFit and others)

Speaker: Gregory Schott (University of Karlsruhe)

legacy tarball with materials schott_2009.04.01_fitting_school_roofit_tutorial_legacy_tarball.tgz

online materials http://www-ekp.physik.uni-karlsruhe.de/~schott/roofit_tutorial/

Slides schott_2009.04.01_fitting_school_roofit_tutorial.pdf

10 See you!

Speakers: Dr Olaf Behnke (DESY), Dr Thomas Schoerner-Sadenius (DESY)