Regular Article - Experimental Physics
Measurement of the Dalitz-decay branching ratio of the π0
Department of Engineering Physics, University of Gaziantep, Gaziantep, 27310, Turkey
* e-mail: Andrew.Beddall@cern.ch
Revised: 12 January 2008
Published online: 14 February 2008
The ratio is measured by comparing the production rates of the π0 in the two decay channels. The analysis is based on approximately four million hadronic decays of the Z boson recorded by the ALEPH detector in the years 1991 to 1995. The value of is determined to be . A recalculation of the Particle Data Group world average gives rise to a slightly improved error, and moves the world average closer to the theoretical value.
© Springer-Verlag , 2008