Eur. Phys. J. Plus (2021) 136: 836
https://doi.org/10.1140/epjp/s13360-021-01836-8

Regular Article

Positively defined color-singlet fragmentation function $g\to {\chi }_{\mathit{cJ}}$

P.N. Lebedev Institute of Physics, 53 Lenin Avenue, 119991, Moscow, Russia

^a baranovsp@lebedev.ru

Received: 2 April 2021
Accepted: 3 August 2021
Published online: 13 August 2021

Abstract

We revisit the fragmentation process $g\to {\chi }_{\mathit{cJ}}+g$. Contrary to what was presented previously in the literature, our fragmentation functions are strictly positive, smooth, and vanish at $z\to 1$.