Author/Authors :
G. Alexander، نويسنده , , J. Allison، نويسنده , , N. Altekamp، نويسنده , , K. Ametewee، نويسنده , , K.J. Anderson، نويسنده , , S. Anderson، نويسنده , , S. Arcelli، نويسنده , , S. Asai، نويسنده , , D. Axen، نويسنده , , G. Azuelos، نويسنده , , A.H. Ball، نويسنده , , E. Barberio، نويسنده , , R.J. Barlow، نويسنده , , R. Bartoldus، نويسنده , , J.R. Batley، نويسنده , , G. Beaudoin، نويسنده , , J. Bechtluft، نويسنده , , A. Beck، نويسنده , , G.A. Beck، نويسنده , , C. Beeston، نويسنده , , et al.، نويسنده ,
Abstract :
A study of b quark fragmentation at LEP is presented using a sample of semileptonic B decays containing a fully reconstructed charm meson. The data are compared to several theoretical models for heavy quark fragmentation; the free parameters in these models are fitted and the sensitivity of the model parameters to the rate of P-wave B meson production is studied. The mean scaled energy fraction of B0 and B+ mesons has been determined to be = 0.695 ± 0.006 ± 0.003 ± 0.007, where the errors are statistical, systematic and model dependence respectively. This result is consistent with previous, less direct measurements from inclusive leptonic B decays. Also presented is a model independent fit to the shape of the energy distribution of weakly decaying B mesons at LEP.
