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#腾讯会议：434-173-935
Abstract: More than twenty-five years after LEP shut down, its archival data remain a remarkably rich testing ground for modern ideas in high-energy physics. In this talk, I present measurements of energy and charge correlators with archival LEP data, a class of observables from modern quantum field theory that connect real-world measurements directly to the structure of the theory. The energy–energy correlator reveals conformal scaling and its breaking at the emergent scale of QCD where quarks and gluons become hadrons. The charge correlator is a macroscopic manifestation of the electroweak anomaly, providing a new formulation of the forward–backward asymmetry. Measured for the first time in both electric charge and the bottom-flavor quantum number, it opens a new route to precision measurements of the weak mixing angle and to investigating the longstanding tension in the bottom-quark forward–backward asymmetry. These measurements illustrate how ideas from formal theory can be turned into experimental observables that address open questions in high-energy physics, while demonstrating the scientific potential of open data and open science.
Speaker: Jingyu Zhang (张竞予) is an experimental particle and nuclear physicist. He received his bachelor's degree from Beihang University and his Ph.D. from the University of Illinois Chicago. Following his Ph.D., he was a postdoctoral researcher at Florida State University and a Distinguished Researcher at the LHC Physics Center at Fermilab. His earlier work centered on CMS data analysis, with particular expertise in QCD, jets, and statistical methods, and he also made major contribution to CMS detector operations and upgrades. He is currently a postdoctoral researcher at Vanderbilt University, focusing on the analysis of archived LEP data and on developing statistical tools for global analyses of collider data.