Inclusive Hadroproduction of $P$-wave Heavy Quarkonia in pNRQCD

Abstract

We compute NRQCD long-distance matrix elements that appear in the inclusive production cross sections of $P$-wave heavy quarkonia in the framework of potential NRQCD. The formalism developed in this work applies to strongly coupled charmonia and bottomonia. This makes possible the determination of color-octet NRQCD long-distance matrix elements without relying on measured cross section data, which has not been possible so far. We obtain results for inclusive production cross sections of ${\chi }_{cJ}$ and ${\chi }_{bJ}$ at the LHC, which are in good agreement with measurements.

Comments: 8 pages, 5 figures, contribution to the proceedings of A Virtual Tribute to Quark Confinement and the Hadron Spectrum (vConf21), August 2nd-6th 2021