Fragmentation of charmed quark to double-charmed hadrons

We consider the production of hadrons containing two charmed quarks in pp and ee collisions. We perform a numerical comparison of the fragmentation approach with the full calculation at O(alpha(4)(s)). We conclude that the non-fragmentation contributions remain important up to transverse momenta as large as about 40 GeV, thus making questionable the applicability of the fragmentation approximation at smaller transverse momenta.

Automated summary

The production of hadrons with two charmed quarks in pp and ee collisions was studied, comparing the fragmentation approach with the full calculation. It was found that non-fragmentation contributions remain significant even at smaller transverse momenta.