“School of Particles And Accelerator”
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| Paper IPM / Particles And Accelerator / 13042 |
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| Abstract: | |||||
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The dominant mechanism to produce hadronic bound states with large transverse momentum
is fragmentation, that is the splitting of a high-energy parton into a hadronic state and other partons. We
review the present schemes to calculate the heavy quark fragmentation functions (FFs) and derive an exact
analytical expression of FF which includes most of the kinematical and dynamical properties of the process.
Using the perturbative QCD, we calculate the FF for c-quark to split into S-wave D+ meson to leading
order in the QCD coupling constant. Our result is compared with the current well-known phenomenological
models which are obtained through a global fit to e+eâ data from SLAC SLC and CERN LEP1 and we
also compare the FF with experimental data form BELLE and CLEO. Specifically, we study the effect of
outgoing meson mass on the pQCD FF. Meson masses are responsible for the low-z threshold, where z is
the scaled energy variable
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