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(Seminar)Testing NRQCD with Quarkonium Produced in Jets at the LHC
2018-07-06  【 】【打印】【关闭

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

 Chinese Academy of Sciences

Seminar

Title

题目

Testing NRQCD with Quarkonium Produced in Jets at the LHC

Speaker

报告人

Prof. Thomas Mehen (彭桓武访问科学家)

Affiliation

所在单位

Duke University

Date

日期

2018年7月6日(周五)上午10:00

Venue

地点

Conference Room 322, ITP main building

Abstract

摘要

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 of 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.

Contact person

所内联系人

郭奉坤

 

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