[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Wednesday, January 17, 2018
2:00 p.m. (coffee at 1:45 p.m.)
CEBAF Center, Room L102

Thomas Mehen
Duke University

*Quarkonium Production in Jets*

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 zdistribution is sensitive to the underlying NRQCD production 
mechanism. Analytic calculations the
zdistributions 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/ψ 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.

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