Seminer Oturumu - "Inclusive Production of rho+- Mesons in Hadoric Decays of Z Boson" -- Dr. Ahmet Bingul

Wednesday 22 Jul 2009, 18:30 → 20:30 Europe/Zurich

6/2-004 (CERN)

Summary: The inclusive production rate of the rho+- vector meson in hadronic Z decays is measured with the ALEPH detector at the LEP collider. A total of 3.2 million hadronic events are selected from data recorded between 1991 and 1995. Decays of rho+- --> pi0 + pi+- are reconstructed for xE>0.05 and xp>0.05 where xp=p?/pbeam and xE=E?/Ebeam. The average rho+- multiplicity per hadronic event is evaluated to be N = 2.59+-0.03+-0.15+-0.04 where the first error is statistical and the second systematic. The third error is from the uncertainty in the extrapolation to xp=xE=0. The rates and differential cross-section are compared with Monte Carlo model predictions and OPAL measurements. The 'Ranking' Method which is a background reduction technique and Residual Bose-Einstein correlations are found to be an important component in the analysis. See also:

more information http://www1.gantep.edu.tr/~bingul/hep/phd/

Slides Ahmet_Bingul-cernTR.pdf