Charm hadrons from fragmentation and B decays in e+ e- annihilation at s**(1/2) = 10.6-GeV

We present an analysis of charm quark fragmentation at 10.6 GeV, based on a data sample of 103 fb collected by the Belle detector at the KEKB accelerator. We consider fragmentation into the main charmed hadron ground states, namely \DZ, \DP, \Ds and \LC, as well as the excited states \DSZ and \DSP. The fragmentation functions are important to measure as they describe processes at a low energy scale, where calculations in perturbation theory lead to large uncertainties. Fragmentation functions can also be used as input distributions for Monte Carlo generators. Additionally, we determine the average number of these charmed hadrons produced per B decay at the \Ys resonance and measure the distribution of their production angle in \epem annihilation events and in B decays.

Note:

51 pages, 11 figures, replaced with version as in journal Journal-ref: PR D73, 032002 (2006)

13.66.Jn
14.20.Lq
13.66.Bc
14.40.Lb
electron positron: colliding beams
electron positron: annihilation
quark: charm
quark: pair production
quark: fragmentation function
charmed particle: production

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Figures(0)

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