July 31, 2017 to August 4, 2017
Fermi National Accelerator Laboratory
US/Central timezone

Quarkonium Production in Jets

Aug 1, 2017, 1:30 PM
Curia II (Fermi National Accelerator Laboratory)

Curia II

Fermi National Accelerator Laboratory

Presentation QCD QCD


Dr Thomas Mehen (Duke University)


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)


Adam Leibovich (Pitt. U.) Lin Dai (Pitt. U.) Mr Reggie Bain (Duke University) Mr Yiannis Makris (Duke University)

Presentation materials