Quarkonia has been long regarded as golden probes to study the fundamental (de)confinement of Quantum Chromodynamics (QCD). Understanding their production provided crucial information for the physics on non-perturbative QCD factorization. However, the mechanism behind the production of various quarkonium states are still under investigation even after ~50 years from the discovery of the J/Psi...
We present our next-to-leading order (NLO) calculation of associated hadroproduction of J/psi plus W or Z bosons within the factorization framework of nonrelativistic QCD (NRQCD). We compare to ATLAS data using various sets of nonperturbative long distance matrix elements (LDMEs) as input, thereby opening up a completely new angle in the ongoing quest to understand whether the LDMEs are...
Based on the potential nonrelativistic QCD formalism, we compute the nonrelativistic QCD long-distance matrix elements (LDMEs) for inclusive production of S-wave heavy quarkonia. This greatly reduces the number of nonperturbative unknowns and brings in a substantial enhancement in the predictive power of the nonrelativistic QCD factorization formalism. We obtain improved determinations of the...
An overview of the most recent experimental results by LHCb, CMS and ATLAS collaborations of the LHC on analyses involving exotic hadrons
