!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> The personal web page of Volker Blobel

Volker Blobel

pp interactions

Volker Blobel

Institut für Experimentalphysik
Fachbereich Physik
Universität Hamburg

Desy Lab Building 1b, Room 347
Deutsches Elektronensynchrotron
Notkestrasse 85
22607 Hamburg, Germany

Unfolding: Papers and Talks

24.th July 2009: "Constrained Least Squares" fits with aplcon, a new test version is available below. 20.th January 2010: Talk "Constrained Least Squares with Correlated Data and Systematic Uncertainties" (DESY, Terascale seminar)

News (24.th July 2009): Millepede II now maintained by the "Statistics Tools group", Analysis Centre, Physics at the Terascale, Helmholtz Alliance. web-site of the Analysis Centre
The preliminary (2007) Millepede II manual and code is given below.

SS 2003 (the last semester before retirement)

Skript Mathematische Ergänzungen zur Physik I und II (Formelsammlung)

Skript Physik III: nicht mehr erhältlich.

Buch: Statistische und numerische Methoden der Datenanalyse

e-Buch-Ausgabe: Statistische und numerische Methoden der Datenanalyse

Alignment/Linear Least Squares Fits with a Large Number of parameters/Millepede

Fast track-fit algorithm based on broken lines

Unfolding of distributions

Constrained Least Squares (new)

Constrained Least Squares and Error propagation (old)

Statistical and numerical methods (Talks and lectures)

Large-scale optimization

History I: Track finding and track fitting

History II: PSA, BOS, LOOK, FPACK and all that

The upper picture shows, among other objects, a well-aligned menhir near the Ardeche valley. The lower picture shows pp interactions at 24 GeV/c beam momentum in the CERN 2m hydrogen bubble chamber, taken around 1970. This picture demonstrates the large value of the total pp cross section.