QCD Analysis with resurrected JADE data

by Jochen Schieck (LMU)

Monday 19 Jul 2010, 14:15 → 15:45 Europe/Berlin

Seminar room 3344 (TUM - Physics Department - Garching)

The JADE Detector was one of the Experiments located at the PETRA- e+e- storage ring at DESY. Data were accumulated between 1979-1986 at a center-of-mass energy between 14-44 GeV. Since the shutdown of the JADE Detector the theoretical understanding of Quantum Chromodynamics (QCD) has been improved substantially. For this reason the data of the JADE experiment have been reanalyzed using state-of-the-art QCD calculations and QCD event generators. The resurrection of the JADE reconstruction and simulation software was crucial for the success of the analyses. In this presentation we will show new results based on hadronic event shapes and jet rates. The measurement of the strong coupling constant, alpha_s, is compareable in sensitivity to other experiments, but probes a different, namely the lower energy region. The results deliver a stringent test of the energy evolution of QCD.