Speaker
Description
We present an investigation into heavy quarkonium production within jets, employ-
ing a theoretical framework that integrates Soft-Collinear Effective Theory (SCET)
with Non-Relativistic QCD (NRQCD) factorization. This approach utilizes Semi-
Inclusive Fragmenting Jet Functions (SIFJFs) to systematically resum large loga-
rithmic enhancements, enabling a precise description of quarkonium-in-jet observables
across diverse energy scales and experimental environments.
The primary focus is on J/ψ production in the photoproduction regime of the
upcoming Electron-Ion Collider (EIC), as detailed in arXiv:2601.05530. As a quark-
dominated environment, the EIC offers a laboratory to test NRQCD Long-Distance
Matrix Elements (LDMEs) in a manner that is highly complementary to the gluon-
rich environment of the LHC. To provide a broader perspective, we compare these
EIC predictions with J/ψ production data from LHCb, highlighting how the differ-
ing sensitivities—quark-initiated versus gluon-initiated processes—serve to rigorously
validate the universality of LDMEs.