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Study of the fragmentation of b quarks into B mesons at the Z peak

Research output: Contribution to journalJournal articlepeer-review

<mark>Journal publication date</mark>12/07/2001
<mark>Journal</mark>Physics Letters B
Issue number1-2
Number of pages19
Pages (from-to)30-48
Publication StatusPublished
<mark>Original language</mark>English


The fragmentation of b quarks into B mesons is studied with four million hadronic Z decays collected by the ALEPH experiment during the years 1991–1995. A semi-exclusive reconstruction of B→ℓνD(★) decays is performed, by combining lepton candidates with fully reconstructed D(★) mesons while the neutrino energy is estimated from the missing energy of the event.

The mean value of xBwd, the energy of the weakly-decaying B meson normalised to the beam energy, is found to be using a model-independent method; the corresponding value for the energy of the leading B meson is . The reconstructed spectra are compared with different fragmentation models.