71 citations · 164 across the 6 of their papers we have counts for
5 papers · 1 filter
Precision measurements of positronium decay rate and energy level
S. Asai, Y. Kataoka, T. Kobayashi +8
Positronium is an ideal system for the research of the bound state QED. New precise measurement of orthopositronium decay rate has been performed with an accuracy of 150 ppm, and t…
Measurement of the e+e- -> W+W- cross section and W decay branching fractions at LEP
The OPAL collaboration
From a total data sample of 701.1 pb^-1 recorded with e+e- centre-of-mass energies of sqrt = 161-209 GeV with the OPAL detector at LEP, 11693 W-pair candidate events are selected.…
Bose-Einstein study of position-momentum correlations of charged pions in hadronic Z0 decays
The OPAL collaboration
A study of Bose-Einstein correlations in pairs of identically charged pions produced in e+e- annihilations at the Z0 peak has been performed for the first time assuming a non-stati…
Inclusive Production of Charged Hadrons in Photon-Photon Collisions
The OPAL collaboration
The inclusive production of charged hadrons in the collisions of quasi-real photons e+e- -> e+e- +X has been measured using the OPAL detector at LEP. The data were taken at e+e- ce…
Measurement of Orthopositronium Decay Rate Using SiO2 Powder: Integration of Thermalization into Time Spectrum
O. Jinnouchi, S. Asai, T. Kobayashi
The intrinsic decay rate of orthopositronium (o-Ps) formed in SiO_2 powder was measured using a modified method which determined the time dependence of the pick-off annihilation ra…