Chirality, Vorticity and Magnetic Field in Heavy Ion Collisions


Because the 7th international conference on chirality, vorticity, and magnetic field in heavy ion collision has been postponed to 2023 due to COVID restrictions, we plan to have a small workshop to review the recent advances in experimental and theoretical studies on these topics. Recent results on CME searches from the RHIC isobar collision data by the STAR experiment in 2022 have placed stringent constraints on possible reaction plane dependent charge separation arising from different chiral magnetic effect (CME) due to magnetic field difference in the isobar Zr+Zr and Ru+Ru collisions. The isobar results also stimulated new experimental and theoretical endeavors to search for the CME. In addition, major advances have been made in measurements of hyperon polarization and vector meson spin alignment, and theoretical mechanisms and new phenomena that connecting to the vorticity of the QCD drops produced in nuclear collisions. This workshop is intended to serve as a bridge point to timely review these exciting topics, in anticipation of the 7th international conference to be held in middle or later part of 2023. The small workshop will be hosted at the UCLA campus on December 2-4, 2022. We expect that the number of attendees will be limited to 40 or so due to uncertain COVID situation then in Los Angeles area.

The goals of the UCLA workshop are to address these scientific issues:

  1. What experimental measurements and/or theory and experiment comparison results would constituent an unambiguous discovery of the CME, CMW, Vorticity and Magnetic Field in heavy ion collisions?

  2. What collision data at RHIC or other facilities will be needed for these potential discoveries? Do we need more data to be taken at RHIC in the future if such opportunity arises?

  3. What experimental and theoretical efforts are needed to further understand the background in CME/CMW searches?

  4. What are possible future theoretical and experimental developments for vorticity and global/local polarizations in heavy ion collisions?

  5. What is the physical mechanism responsible for the large global spin alignment of phi mesons?

  6. What is the status and new development to experimentally confirm the transit magnetic field in colliding heavy ions?

If you would like to join the workshop and/or present your results/perspectives on these scientific issues, please send a request to a member of the local organizing committee.

  • Aditya Prasad Dash
  • Aihong Tang
  • Andrea Palermo
  • Berndt Mueller
  • Brian Chan
  • Chunjian Zhang
  • David Wagner
  • Dmitri Kharzeev
  • Dylan Neff
  • Enrico Speranza
  • Evan Finch
  • Fanyi Zhao
  • Fidele Twagirayezu
  • Francesco Becattini
  • Fuqiang Wang
  • Gang Wang
  • Huan Huang
  • Hui Li
  • Jared Reiten
  • Jia Jiangyong
  • Jinfeng Liao
  • Kenji Fukushima
  • Mike Lisa
  • Niseem Abdelrahman
  • Nu Xu
  • Oleg Teryaev
  • Panos Christakoglou
  • Prithwish Tribedy
  • Qun Wang
  • Rajeev Singh
  • Sergei Voloshin
  • Shi Pu
  • Shuzhe Shi
  • Subikash Choudhury
  • Thomas Marshall
  • Wai Kin Lai
  • Wei Li
  • Xiatong Wu
  • Yu Hu
  • Yufu Lin
  • Yunshan Cheng
  • Zhangbu Xu
  • Zhiwan Xu
  • Zhongbo Kang
  • Zhongling Ji
    • 8:30 AM 12:00 PM
      Spin Dynamics/Vorticity Sessions: Spin Dynamics/Vorticity
      Convener: Fuqiang Wang (Purdue University (US))
      • 8:30 AM
        Registration 20m
      • 8:50 AM
        Welcome and Logistics 10m
        Speaker: Huan Huang (UCLA)
      • 9:00 AM
        Recent developments of spin polarization phenomenology in relativistic heavy ion collisions 30m
        Speaker: Francesco Becattini (Università di Firenze)
      • 9:30 AM
        Spin alignment measurements and future perspective 30m
        Speaker: Aihong Tang (Brookhaven National Laboratory)
      • 10:00 AM
        Quarkonia and heavy flavor polarization: recent results and future perspectives (Zoom) 30m
        Speaker: Luca Micheletti
      • 10:30 AM
        Coffee Break 30m
      • 11:00 AM
        Measurement of novel vorticity phenomenon and future perspective (Zoom) 30m
        Speaker: Mike Lisa
      • 11:30 AM
        Exact Polarization in Relativistic Fluids at Global Equilibrium 30m
        Speaker: Andrea Palermo (Università di Firenze, INFN Firenze, Goethe Univesität Frankfurt)
    • 12:00 PM 2:00 PM
      Lunch Break 2h
    • 2:00 PM 5:30 PM
      Spin Dynamics/Vorticity Sessions: Spin Dynamics/Vorticity
      Convener: Wei Li (Rice University)
      • 2:00 PM
        Polarization measurement update and future 30m
        Speaker: Sergei Voloshin
      • 2:30 PM
        Spin Polarization from Quantum Kinetic Theory 30m
        Speaker: David Wagner (Goethe University Frankfurt)
      • 3:00 PM
        Spin hydrodynamics: Status and Future Perspective 30m
        Speaker: Enrico Speranza (University of Illinois at Urbana-Champaign)
      • 3:30 PM
        Coffee Break 30m
      • 4:00 PM
        Local polarization of Lambda hyperons: the role of spin Hall effect, initial condition and other possible corrections (zoom) 30m
        Speaker: Shi Pu (USTC)
      • 4:30 PM
        Phi spin alignment (zoom) 30m
        Speaker: Qun Wang (University of science and technology of China)
      • 5:00 PM
        Opportunities at CBM 30m
        Speaker: Nu Xu (LBNL)
    • 9:00 AM 12:30 PM
      CME/CMW and CVE Sessions: CME/CMW and CVE
      Convener: Nu Xu (LBNL)
    • 12:30 PM 2:00 PM
      Lunch Break 1h 30m
    • 2:00 PM 5:00 PM
      CME/CMW and CVE Sessions: CME/CMW and CVE
      Convener: Zhangbu Xu (BNL)
      • 2:00 PM
        A possibility of twisted gauge backgrounds and chirality production in the heavy-ion collision 30m
        Speaker: Kenji Fukushima (The University of Tokyo)
      • 2:30 PM
        Event Shape Selection, BES Data and Future Perspective 45m
        Speakers: Gang Wang (UCLA), Huan Huang (UCLA)
      • 3:30 PM
        Coffee Break 30m
      • 4:00 PM
        CME/CMW searches at LHC energies 30m
        Speaker: Panos Christakoglou (Nikhef)
      • 4:30 PM
        Challenges and Future Perspective (Zoom) 30m
        Speaker: Berndt Muller
    • 6:00 PM 8:30 PM
      Social Dinner 2h 30m
    • 9:00 AM 12:00 PM
      EM Field Sessions: EM Field
      Convener: Panos Christakoglou (Nikhef)