https://doi.org/10.1140/epjc/s10052-019-6700-0
Regular Article - Theoretical Physics
Fragmentation of charm to charmonium in 
and 
collisions
1
P.N. Lebedev Institute of Physics, Lenin Avenue 53, Moscow, 119991, Russia
2
Departamento de Física, Universidad Técnica Federico Santa María, Valparaiso, Chile
3
Centro Científico-Tecnológico de Valparaíso, Avenida España 1680, Valparaiso, Chile
* e-mail: boris.kopeliovich@mpi-hd.mpg.de
Received:
8
January
2019
Accepted:
18
February
2019
Published online:
15
March
2019
We perform numerical comparison of the fragmentation mechanism of charmonium production (
followed by 
) with the full leading order calculation (
at 
). We conclude that the non-fragmentation contributions remain important up to 
transverse momenta about as large as 40 GeV, thus making questionable the applicability of the fragmentation approximation at smaller transverse momenta.
© The Author(s), 2019
