2014/01/23 by Brodsky, Stanley J.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)
paper · doi:10.48550/arxiv.1401.5886
Heavy quarks provide a new dimension to QCD, allowing tests of fundamental theory, the nature of color confinement, and the production of new exotic multiquark states. I also discuss novel explanations for several apparently anomalous experimental results, such as the large t t forward-backward asymmetry observed in p p colisions at the Tevatron, the large rates for γ or Z plus high-pT charm jets observed at the Tevatron, the strong nuclear absorption of the J/ψ observed in pA collisions at the LHC, as well as fixed target experiments at high xF. Precision measurements of the heavy quark distribution in hadrons at high x are needed since intrinsic heavy quarks can play an important role in high x phenomenology as well as predicting a new mechanism for high-xF Higgs production. The role of multi-parton interactions, such as di-gluon initiated subprocesses for forward quarkonium hadroproduction, is discussed. I also briefly discuss a new approach to the QCD confinement potential and the origin of the QCD mass scale based on AdS/QCD, light-front holography and a unique extension of conformal theory. The renormalization scale ambiguity can be eliminated at finite orders in pQCD using the scheme-independent PMC procedure, thus increasing the precision of predictions and eliminating an unnecessary source of theoretical systematic error.