https://doi.org/10.1140/epja/s10050-021-00545-1
Regular Article - Theoretical Physics
Manipulating strong electromagnetic fields with the average transverse momentum of relativistic nuclear collisions
1
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
Received:
5
April
2021
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
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
