Fragmentation of fully heavy tetraquarks: The TQ4Q1.1 functions as a case study

Abstract: We extend the study of exotic matter formation via the {\tt TQ4Q1.1} set of collinear, variable-flavor-number-scheme fragmentation functions for fully charmed or bottomed tetraquarks in three quantum configurations: scalar ($J^{PC} = 0^{++}$), axial vector ($J^{PC} = 1^{+-}$), and tensor ($J^{PC} = 2^{++}$). We adopt single-parton fragmentation at leading power and implement a nonrelativistic QCD factorization scheme tailored to tetraquark Fock-state configurations. Short-distance inputs at the initial scale are modeled using updated calculations for both gluon- and heavy-quark-initiated channels. A threshold-consistent DGLAP evolution is then applied via HFNRevo. We provide the first systematic treatment of uncertainties propagated from the color-composite long-distance matrix elements that govern the nonperturbative hadronization of tetraquarks. To support phenomenology, we compute NLL/NLO$^+$ cross sections for tetraquark-jet systems at the HL-LHC and FCC using (sym)JETHAD, incorporating angular multiplicities as key observables sensitive to high-energy QCD dynamics. This work connects the investigation of exotic hadrons with state-of-the-art precision QCD.