Title: Unraveling QCD using hard probes in proton-proton and heavy-ion data

Speaker: Ezra D.Lesser,CERN,Research Fellow

Time: Sep.24,202510:00am-11:00am

Location: Physics Building W260

Host: Xianglei ZHU,Associate professor zhux@tsinghua.edu.cn

Abstract:

Understanding the dynamics of Quantum Chromodynamics(QCD)across differentenergy regimes remains a central challenge of high-energy physics.Hard probessuch as jets and heavy flavor hadrons are powerful tools to test QCD predictions andto characterize the strongly interacting matter created in heavy-ion collisions.In thistalk,I will present recent advances from experimental studies at the LHC,with anemphasis on how precision measurements in both proton-proton and heavy-ionsystems shed light on parton dynamics,hadronization,and medium-induced effects.Highlights will include new results on heavy-flavor production,jet substructure andquenching phenomena,and novel probes at forward rapidity.These studies providecomplementary insights into the role of cold and hot QCD matter effects,helping tobridge the gap between perturbative calculations and the emergent properties of thequark-gluon plasma.Finally,I will provide an outlook on upcoming opportunitieswith Run 3 data,and the prospects for a deeper understanding of QCD in the high-luminosity era.

Introduction of the speaker:

Ezra D.Lesser is an experimental physics research fellow at CERN.He obtained hisPh.D.from the University of California,Berkeley as a member of the ALICECollaboration,and for the last two years he has been studying QCD dynamics usingheavy-flavor jet substructure as a member of LHCb.