sPHENIX discussion of physics

["Perepelitsa, Dennis" <dvp AT bnl.gov>]

Hi sPHENIX jet enthusiasts,

You may be interested in this week’s BNL Physics Colloquium, which can be watched over Zoom.

Dennis

Begin forwarded message:

From: "elamar AT bnl.gov" <elamar AT bnl.gov>

Subject: Today's Seminars

Date: January 9, 2024 at 2:03:02 PM GMT+1

To: "physics-seminars-l AT lists.bnl.gov" <physics-seminars-l AT lists.bnl.gov>

Reply-To: "Lamar, Erica" <elamar AT bnl.gov>, "Allen, Leesa" <leesa AT bnl.gov>

Physics Colloquium
"A quenched jet and a theorist walk into a bar..."
Presented by Prof. Peter Arnold, University of Virginia

Tuesday, January 9, 2024, 3:30 pm — Large Seminar Room, Bldg. 510

Please note that self-served coffee and cookies will be in the seminar lounge at 3:00 pm.

Abstract:
Since first observed at RHIC roughly 20 years ago, jet quenching has been used as an important probe of quark-gluon plasmas (meaning quark-gluon plasmas/liquids/glasmas/whatever) made in heavy-ion collisions.  Now sPHENIX will carry on that RHIC tradition with new, more detailed investigations.  In this talk, I will take a step back and discuss a selected set of fundamental, qualitative issues concerning the theory of how very high-energy quarks and gluons shower and lose energy inside a quark-gluon plasma.  I will start with a qualitative review of a 1950s theoretical result (the Landau-Pomeranchuk-Migdal effect) that medium-induced QED shower development is significantly slowed at extremely high energy because of coherence effects in how high-energy particles interact with the medium.  Those calculations were later generalized to QCD in the 1990s.  But there are also more subtle interference effects, which made it unclear whether we have any real theoretical control at all in calculating high-energy in-medium QCD showers.  I hope to convince you that certain theoretical "spherical cow" thought experiments give interesting and important insights into this problem.

Hosted by: Raju Venugopalan

Join Videoconference: https://bnl.zoomgov.com/j/1605020278?pwd=cHJ1bDRuK1FDNnZLSnpxVkZhcDQ3QT09
More Information: https://indico.bnl.gov/event/21677/


Thank you,
Erica Lamar
Brookhaven National Laboratory
Physics Department
Sr. Administrative Assistant to the Chair's Office
Building 510A
Upton, NY 11973-5000
(631) 344-2585
elamar AT bnl.gov<mailto:elamar AT bnl.gov>
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Dennis V. Perepelitsa
Associate Professor, Physics Department
University of Colorado Boulder