The Fragmentation Function of Gluon Splitting into P-wave Spin-singlet Heavy Quarkonium

Abstract

The gluon fragmentation function of $g\to h_c$ at leading order of strong coupling constant ${\alpha }_s$ and typical velocity $v$ is calculated in the framework of NRQCD, of which the contributions from both color-singlet and -octet processes are taken into account and hence the result is infrared safe. It is found that the fragmentation probability of a high energy virtual gluon to split into $h_c$ is about $7.1\times 10^{-7}$. The analytic fragmentation function presented in this work can be employed to the study of $h_c$ production in large transverse momentum at hadron colliders, such as Large Hadron Collider(LHC), and is also applicable for the study of $h_b$ hadronproduction.

10 pages, 3 figures

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