1. IE browser is NOT supported anymore. Please use Chrome, Firefox or Edge instead.
2. If you are a new user, please register to get an Indico account through https://login.ihep.ac.cn/registIndico.jsp. Any questions, please email us at helpdesk@ihep.ac.cn or call 88236855.
3. If you need to create a conference in the "Conferences, Workshops and Events" zone, please email us at helpdesk@ihep.ac.cn.
4. The max file size allowed for upload is 50 Mb.

The topics of this online seminar series cover broad aspects of hot and dense QCD matter, with an emphasis on physics related to RHIC beam energy scan (BES) program.

The fifth season of the series will take place

Before Nov. 6th: 9pm (Beijing)=10:00pm (Tokyo)=6:30pm (New Delhi)=3:00pm (Frankfurt) =6:00 am (San Francisco)=9:00 am (New York)

After Nov. 6th: 10pm (Beijing)=11:00pm (Tokyo)=7:30pm (New Delhi)=4:00pm (Frankfurt) =6:00 am (San Francisco)=9:00 am (New York)

every Tuesday between Sep. 6th and Dec. 13th (excluding thanksgiving), 2022. 


Sep. 6 

Unnuclear Physics: Conformal Symmetry in Nuclear Reactions

Dam Son (U. Chicago)

Abstract: Conformal symmetry plays an important role in quantum field theory and statistical physics. A  nonrelativistic version of the conformal symmetry, also called Schrödinger symmetry, is approximately realized in various physical systems, including neutrons in nuclear physics and ultracold atoms. After going through some basic facts about nonrelativistic conformal field theory, we describe an application to nuclear reactions with several neutrons in the final state.

Chair: Thomas Schäfer (NCSU)

Slides   Recordings

Sep. 13 

Embedding a Critical Point in a Background Equation of State for QCD

Joseph Kapusta (UMN)

Abstract: Lattice QCD simulations have shown unequivocally that the transition from hadrons to quarks and gluons is a crossover when the baryon chemical potential is zero or small. Many model calculations predict the existence of a critical point at a value of the chemical potential where current lattice simulations are unreliable. We show how to embed a critical point in a smooth background equation of state in two very different ways so as to yield the critical exponents and critical amplitude ratios expected of a transition in the same universality class as the liquid--gas phase transition and the 3D Ising model. The resulting equations of state have parameters which may be inferred by hydrodynamic modeling of heavy ion collisions in the Beam Energy Scan II at the Relativistic Heavy Ion Collider or in experiments at other accelerators.

Chair: Rob Pisarski (BNL)

Slides    Recordings

Sep. 20 

Heavy Ion Collisions: What Next?

Krishna Rajagopal (MIT)

Abstract: The organizers have asked me to provide an introduction to heavy ion physics. Since in the U.S. we are in the midst of developing the next long range plan for nuclear physics, I thought I would begin by introducing heavy ion physics in the way that we did around the time of the previous long range plan, circa 2015. By looking at this introduction from today’s perspective, we can see how robust the big picture we had at that time was and highlight recent progress.  In the second half of the talk I will look ahead.

Chair: Berndt Müller (Duke)

Slides  Recordings

Sep. 27

Exploration of Matter in Extreme conditions with Machine Learning

Kai Zhou (FIAS)

Abstract: In this talk I will demonstrate how we can use machine learning based computational paradigm to help our exploration of QCD matter in extreme conditions.  The focus is about properties of hot and dense nuclear matter related studies. Around it, experimentally the relativistic nuclear collision are performed to realize the extreme conditions for studying it while theoretically the first-principle lattice field theory constructs the main path to investigate the equilibrium thermodynamics of the matter. Meanwhile, the astronomical observations on Neutron Star also provide constraints on the equation of state of the dense nuclear matter. Machine Learning within the broadly Artificial Intelligence (AI) brand is a rapidly developing field that has been proven to be powerful in recognizing patterns from complex data, and powerful as well in representing relationships/mappings of systems. This modern computation technologies has become increasingly prominent in all sectors of our everyday life, and also into frontiers of scientific research especially in computational related studies. Specifically, in this talk I will introduce the potential of machine learning for research about hot and dense nuclear matter, ranging from identifying essential physics from nuclear collision experiment, to assisting the lattice QCD data analysis, and to efficiently exploiting astronomical observations in inferring the Neutron Star equation of state.

Chair: Huichao Song (PKU)

Slides   Recordings

Oct. 4

QCD Phase Diagram and the Equation of State of Strong-Interaction Matter

Frithjof Karsch (U. Bielefeld)

Abstract: Lattice QCD calculations at non-zero temperature and with non-vanishing chemical potentials provide a powerful framework for the analysis of the phase structure of strong-interacting matter. Such calculations allow the determination of the crossover transition region at QCD with physical quark masses as well as the determination of the true chiral phase transition in the limit of vanishing light quark masses.

In this talk we focus on applications of the Taylor expansion approach to the analysis of QCD at non-vanishing values of the chemical potentials. We present results on the determination of the pseudo-critical and chiral phase transition temperatures at vanishing and non-vanishing values of the chemical potentials. We furthermore present a new, high statistics determination of the QCD equation of state. We point out their importance for constraining the location of a possible critical end point in the QCD phase diagram. If time permits, we will also present results on higher order cumulants at non-vanishing baryon chemical potential in strangeness neutral matter and compare them with experimental data on net proton-number fluctuations obtained by STAR and ALICE. 

Chari: Claudia Rattic (U. Houston)

Oct. 11

Charles Gale (McGill): “Thermal radiation”

Chair: Rapp Ralf (TAMU)

Oct. 18

Pavel Kovtun (U. Victoria): “New developments in relativistic hydrodynamics”

Chair: Michal Heller (Gent U)

Oct. 25

Elena Bratkovskaya (GSI): “Light nuclei production in HIC”

Chair: Xiaofeng Luo (CCNU)

Nov. 1

Sanjay Reddy (INT): “The properties of Neutron star”.

Chair: Kenji Fukushima (U. Tokyo)

Nov. 8

Giuliano Giacalone (Heidelberg): “HIC and nuclear structure”

Chair: Bjoern Schenke (BNL)

Nov. 15

Tetsuo Hatsuda (RIKEN): “Hadron-Hadron Interactions from Lattice QCD”

Chair: Laura Fabbietti (TUM)

Nov. 29

Martin Savage (INT): “Quantum computing and nuclear physics”

Chair: Dimitri Kharzeev (Stony Brook & BNL)

Dec. 6

Gunther Roland (MIT): “sPHENIX”

Chair: Yen-Jie Lee (MIT)

Dec. 13

John Lajoie (Iowa State U): “EIC”

Chair: Abhay Deshpande (Stony Brook)



The interested participants are kindly requested to register through "registration" on the left side of the indico page. By attending this event you agree that the seminar and discussion being recorded and posted on the seminar web site.


Heinz, Ulrich  (OSU)                   heinz.9@osu.edu
Luo, Xiaofeng (CCNU)                xfluo@ccnu.edu.cn
Ratti, Claudia (UH)                     cratti@central.uh.edu
Song, Huichao (PKU)                 huichaosong@pku.edu.cn
Xu, Nu (LBNL)                            nxu@lbl.gov
Yin, Yi (IMP)                               yiyin@impcas.ac.cn


Previous series:

Season I (Fall, 2020)

Season II (spring, 2021)

Season III (Fall 2021)

Season IV (Spring 2022)

Code of Conduct 

The organizers are committed to making this seminar series productive and enjoyable for everyone. Creating a supportive professional environment where open and frank discussion of ideas can take place, where everyone is treated with courtesy and respect, and in which diversity and inclusion are valued is the responsibility of all the participants. We will not tolerate harassment of attendees or others involved in the conference in any form. By joining the Zoom call, you agree to follow these guidelines:

1) Behave professionally in personal interactions. Harassment and sexist, racist, or exclusionary comments or jokes are not appropriate. Harassment includes sustained disruption of talks or scientific discussions, deliberate intimidation, stalking, offensive comments related to gender identity, sexual orientation, disability, physical appearance, body size, race, nationality, or the religion or non-religion of participants.

2) Be kind to others. Do not insult or put down the speaker or the other attendees. Scientific discussion and criticism is vital and should be conducted in this spirit.

3) All communication should be appropriate for a professional audience including people of many different backgrounds.

Should a participant be asked to stop any inappropriate behavior, they are expected to comply immediately. In serious cases, they may be muted or asked to leave the meeting at the sole discretion of the organizers. 



Registration for this event is currently open.