Speaker
Prof.
Wangmei Zha
Description
Talk title: Coherent Photoproduction in Relativistic Heavy-ion Collisions
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Speaker: Prof. Wangmei Zha, USTC
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Abstract:
The coherent photon-nucleus and photon-photon interactions has been studied in detail at RHIC and LHC to probe the gluon distribution in nucleus and to test QED via relativistic heavy-ion collisions. These kind of interactions are traditionally thought to only exist in ultra-peripheral collisions, where there is no hadronic interactions. Recently, a significant excess of J/ψ yield and dielectron production at very low transverse momentum (pT < 0.3 GeV/c) was observed by the ALICE and STAR collaborations in peripheral A+A collisions, which points to evidence of coherent photoproduction in violent hadronic interactions. The survival of photoproduced J/ψ and electron pair in hadronic heavy-ion collisions merits experimental and theoretical investigations, which are currently rare on the market. Furthermore, the additional source from coherent photoproduction could serve as a novel probe to study the properties of quark-gluon plasma. In this presentation, I will report our recent studies on coherent photoproduction in relativistic heavy-ion collisions and discuss the feasibility of exploring the properties of quark-gluon plasma with the coherent photon induced products.
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About the speaker:
Wangmei Zha is currently an associate professor at USTC. His research interest lies in the data analysis and phenomenological models about coherent photoproduction in relativistic heavy-ion collisions and in the future EIC. He joined STAR collaboration since 2012 and led the coherent J/ψ measurements in STAR. He served as the convener of STAR light flavor physics working group during 2018 and 2020, and won the RHIC&AGS merit award in 2019.
