WIDG Seminar: Tong Liu, Yale, “Inclusive jet analysis in √s_NN=200 GeV p+Au collisions at STAR”

Event time: 
Tuesday, May 28, 2019 - 12:00pm to 1:00pm
Wright Lab (WNSL), 216 See map
272 Whitney Avenue
New Haven, CT 06511
Event description: 

The Quark Gluon Plasma (QGP) is a state of matter at extremely high temperature and/or energy density, where the quark constituents of nucleons become asymptotically free, and perturbative QCD (pQCD) becomes the dominant law of interaction. Although it has been proven at RHIC and the LHC that the QGP exists in large nucleus+nucleus (A+A) system, it was expected to be absent in small systems, where at least one of the colliding particles is “light”, e.g. proton/deuterium. However, long-range correlations were observed in proton+nucleus (p+A) measurements in LHC and RHIC in 2013, thus making the existence of the QGP in p+A system once again an open question. To probe the existence of the QGP in p+A systems, we reconstruct and study the collimated spray of hadrons produced in the collision called a “jet”. Specifically, we are looking for the so-called “jet quenching” effect in central p+A collisions, where the QGP softens the jet yield. In this analysis, we study both the charged and neutral jet production from the Sqrt(s) = 200 GeV p+Au collision at STAR, and I will present progress in our calibration, reconstruction and simulation process, as well as our plan for future analyses.