2025/08/01 by Copeland, Marston, Dai, Lin, Fu, Yu +1 · 1 citation
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)
paper · doi:10.48550/arxiv.2508.00814
Based on recent data from LHCb, we study ψ(2S) production in jets using non-relativistic QCD (NRQCD) in conjunction with the Fragmenting Jet Function (FJF) and Gluon Fragmentation Improved Pythia (GFIP) formalisms. Similar to previous studies of J/ψ production in jets, our results show that these formalisms offer a much better description of data than the default Pythia+NRQCD prediction. We compare and contrast the predictions from the FJF formalism and the GFIP approach. In addition, our results show that the distribution of ψ(2S) in jets is an excellent discriminator to test different predictions for the ψ(2S) LDMEs from various extractions. We find a large disparity between the predictions from three different collaborations, showing that a more precise extraction of the ψ(2S) LDMEs may be necessary.