Hadron Ion Tea (HIT) Seminar Series
[formerly the Heavy Ion Tea Seminars]
Nuclear Science Division
Lawrence Berkeley National Laboratory
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HIT seminars are on Tuesdays at 4:00pm Pacific Time (unless otherwise noted)
HIT seminars are on Tuesdays at 4:00pm Pacific Time (unless otherwise noted)
Organizers: Yuxun Guo, Yuuka Kanakubo, Felipe Ortega, Mateusz Ploskon, Bigeng Wang and Zhenyu Ye (Contact us at hit-organizers@lbl.gov)
Previous seminars can be viewed on our HIT Youtube Channel
Upcoming seminars
Upcoming seminars
Welcome to our Hadron-Ion Tea Seminar Series in 2025! All talks are available on zoom, some are in-person as well - we hope you join us!
Dr. Scheid earned his Ph.D. at Goethe University Frankfurt, where he studied dielectron production in proton–lead collisions to investigate cold nuclear matter effects, following earlier work on heavy-flavour contributions in proton–proton collisions. He contributed extensively to dielectron performance studies for the ALICE 3 Letter of Intent and served on its editorial team. Currently a research fellow at CERN, he analyses dielectrons in oxygen–oxygen collisions and participates in the ALICE 3 vertex detector test-beam campaign. Since 2023, he has coordinated the ALICE low-mass dielectron Physics Analysis Group (PAG).
Present and future of dielectron measurements with ALICE
Present and future of dielectron measurements with ALICE
Dr. Sebastian Scheid (CERN)
October 21, 2025 (in-person)
Location: Swiatecki Lounge B70 annex - 228
Time: 4:00pm Pacific Time
ZOOM for those who are unable to come in-person: LINK
Host: Mateusz Ploskon
Abstract: Low mass dielectrons, defined as electron-positron pairs with invariant masses below ~3 GeV/c², serve as penetrating probes of the hot and dense QCD medium created in heavy-ion collisions. Within this mass range, dielectron measurements can yield information about the temperature of the quark-gluon plasma (QGP) and the restoration of chiral symmetry in a hot and dense system of strongly interacting matter. The ALICE experiment at the LHC, with its excellent tracking and particle identification capabilities, is uniquely equipped to measure dielectron spectra in the relevant mass range. After an introduction to the topic, this seminar will present ALICE results on low-mass dielectron production based on the data collected in LHC Run 2 and the status of the analysis of the data collected in LHC Run 3. In addition, expectations for future measurements in LHC Run 5 with the ALICE 3 detector will be discussed. The presentation will conclude with a brief overview of the detector R&D relevant to a successful dielectron program in LHC Run 5.
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