Fragmentation Functions:Modifications and new Applications

Abstract

We present a heavy quark fragmentation mechanism based on a modified version of the standard model of quark fragmentation, taking into account peculiarities of the Regge trajectories of quarkonia containing heavy quarks. The modified model describes the experimental data more satisfactorily both for meson and baryon production.

Figures (5)

• Figure 1: Comparison of particle wave functions in our approach (red lines) and in the model Bondar:2004sv (blue lines)
• Figure 2: Fit by fragmentation function (\ref{['Eq_FF_D0']}) $D^0$-meson production (Data of Belle is shown on the left and CLEO on the right). Green line is the fragmentation function.
• Figure 3: Description of the fragmentation of the $D_s$-meson production function (\ref{['eq:kuti_M_valentn']}) based on Belle experiment. Blue color for the $D^0$-meson, red for the $D_s$-meson. For clarity, the $D_s$-meson cross section is enlarged.
• Figure 4: Description of the $B$-meson production distribution by the fragmentation function (\ref{['Eq_FF_B']}) based on data from the SLD (left) and ALEPH (right) experiments.
• Figure 5: Comparison of fragmentation functions for the $\Lambda_c$-baryon with experimental Belle data.