Apr 23 – 27, 2023
JMS Aster Plaza
Asia/Tokyo timezone

Feasibility study of ultra-intense magnetic field detection via virtual photon derived dimuon polarization in ALICE Run 3

Apr 25, 2023, 4:40 PM
Multi-Purpose Studio, 2nd Floor (JMS Aster Plaza)

Multi-Purpose Studio, 2nd Floor

JMS Aster Plaza

Poster Intense field and vorticity Poster Session


Shunichiro Muraoka (for ALICE Collaboration)


In non-central high-energy nuclear collision, very strong magnetic field is produced. High intensity magnetic field have never been directly detected experimentally, and we propose to measure virtual photon polarization as direct evidence. Since anisotropy appears in the lepton pair decay plane of a virtual photon polarized by a magnetic field, we aim to detect virtual photon polarization by quantifying and measuring it.
The purpose of this study is to evaluate, using simulations, whether virtual photon polarization can be detected in lead nucleus collisions in ALICE Run 3. The data were produced separately for the underlying event and for polarized μ-particle pairs, which were then combined into the single data set.
The polarization is observed with a good significance in the current simulation setting. I am currently in the process of running simulations to match the estimated statistics and the signal to background ratio at ALICE Run 3. I will show the latest result of the study.

Theory / experiment Experiment
Group or collaboration name ALICE Collaboration

Primary author

Shunichiro Muraoka (for ALICE Collaboration)

Presentation materials