Regular Article - Theoretical Physics
Manipulating strong electromagnetic fields with the average transverse momentum of relativistic nuclear collisions
Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120, Heidelberg, Germany
2 Department of Physics and Astronomy, Wayne State University, 48201, Detroit, MI, USA
3 RIKEN BNL Research Center, Brookhaven National Laboratory, 11973, Upton, NY, USA
Accepted: 29 June 2021
Published online: 12 July 2021
We show that an event-shape engineering based on the mean transverse momentum of charged hadrons, , provides an optimal handle on the strength of the magnetic field created in central heavy-ion collisions at high energy. This is established through quantitative evaluations of the correlation existing between the event-by-event magnetic field produced by the spectator protons in 5.02 TeV Pb + Pb collisions and the event-by-event at a given collision centrality. We argue that the event selection based on provides a better handle on the magnetic field than the more traditional selection based on the event ellipticities. Advantages brought by this new method for the experimental search of the chiral magnetic effect are discussed.
© The Author(s) 2021
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