Charmed quark fragmentation in B-mesons decays

TL;DR

This paper investigates how nonfragmentational processes involving the light valence quark in B-mesons influence charmed particle production, significantly altering D-meson spectra and yield ratios.

Contribution

It provides a phenomenological description of nonfragmentational contributions to charm production in B-meson decays, highlighting their impact on D-meson spectra and ratios.

Findings

Nonfragmentational contributions are significant at low energies.

These contributions involve the light valence quark from the B-meson.

They substantially change D-meson yield ratios.

Abstract

It is well known that large nonfragmentational contributions to inclusive production of charmed particles appear at low energies. In the case of charm production in $B$-meson decays these contributions arise from the participation of the light valent quark from the $B$-meson and can be easily described phenomenologically. These contributions affect $D$-meson spectra and essentially change ratios between yields of different $D$-meson states.