题 目：The ultra-strong electromagnetic field in heavy-ion collisions
报告人：申迪宇 博士 复旦大学
时 间：2024年6月12号（星期三）上午10:00
地 点：物理学院LE201
邀请人：郑绪昌
报告摘要：Non-central heavy-ion collisions can generate an ultra-strong magnetic field, on the order of 1018 Gauss, the evolution of which in the quark gluon plasma (QGP) remains open question. Direct evidence of the electromagnetic field in the QGP is elusive because the magnetic field drops rapidly with time in the vacuum until the QGP is formed. Since the collective motion of oppositely charged quarks can be affected by the electromagnetic force, it was proposed that the directed flow of charged particles could serve as the probe to detect the evolution of the electromagnetic field in the QGP. In this report, I will present recent experimental measurements of the charge-dependent directed flow in heavy-ion collisions. The results in peripheral collisions reveal the impacts of the electromagnetic field on the QGP for the first time in such experiments.
Dr. Diyu Shen is currently a Postdoctoral researcher at Fudan University. He obtained his Ph.D. in nuclear and particle physics at the Shanghai Institute of Applied Physics in 2021. His research centers around the measurements of chiral magnetic effect, collective flow and spin alignment of vector meson in heavy-ion collision experiments.