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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 (update 2015)

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.