Speaker
Dr
Thomas Mehen
(Duke University)
Description
This talk will describe new tests of quarkonium production using quarkonia that are produced within jets. We study the distribution in the fraction $z$ of a jet's longitudinal momentum carried by the quarkonium. The $z$ distribution is sensitive to the underlying NRQCD production mechanism. Analytic calculations the $z$ distributions in SCET that incorporate Next-to-Leading-Log (NLL) resummation disagree with default PYTHIA predictions. We describe a modified simulation method which agrees well with NLL analytic calculations. This method is then successfully applied to recent LHCb measurements of $J/\psi$ within jets. We discuss the implications of this measurement for extractions of NRQCD long-distance matrix elements. Finally, we discuss other observables involving quarkonium within jets which may be useful for discriminating between NRQCD production mechanisms.
Primary author
Dr
Thomas Mehen
(Duke University)
Co-authors
Adam Leibovich
(Pitt. U.)
Lin Dai
(Pitt. U.)
Mr
Reggie Bain
(Duke University)
Mr
Yiannis Makris
(Duke University)