[Theory-seminars] Theory seminar, Wednesday Jan 17, 2pm, L102 - Thomas Mehen

[Alessandro Pilloni]

Theory Center Seminar
Wednesday, January 17
2:00pm
CEBAF Center, Room L102 

Thomas Mehen (Duke U.)

“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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