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CAS Key Laboratory of Theoretical Physics |
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Institute of Theoretical Physics |
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Chinese Academy of Sciences |
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Seminar |
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Title
题目 |
Testing NRQCD with Quarkonium Produced in Jets at the LHC |
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Speaker
报告人 |
Prof. Thomas Mehen （彭桓武访问科学家） |
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Affiliation
所在单位 |
Duke University |
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Date
日期 |
2018年7月6日（周五）上午10:00 |
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Venue
地点 |
Conference Room 322, ITP main building |
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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. |
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Contact person
所内联系人 |
郭奉坤 |
