# EPS-HEP2021 conference

26-30 July 2021
Zoom
Europe/Berlin timezone

## Spectator induced electromagnetic effects on charged meson production in nucleus-nucleus collisions from NA61/SHINE at CERN SPS

26 Jul 2021, 18:00
15m
Zoom

#### Zoom

Parallel session talk Heavy Ion Physics

### Speaker

Sneha Bhosale (IFJ PAN)

### Description

The SPS Heavy Ion and Neutrino Experiment (NA61/SHINE) studies the properties of hadron production in collisions of beam hadrons and nuclei with fixed hadronic and nuclear targets.
In this talk, I will discuss the space-time evolution of the system of strongly interacting matter created in the collision, studied from the modification of charged pion spectra and $\pi^{+}/\pi^{-}$ ratios by the electromagnetic (EM) field induced by the spectator system as a function of collision centrality. First results on Ar+Sc collisions at 40 A GeV/$c$ ($\sqrt{s_{NN}}$ = 8.76 GeV) will be shown, including the first-ever measurement of spectator induced EM effects in a small peripheral nucleus-nucleus system in the SPS energy range.
These will be compared to Ar+Sc intermediate collisions at 150 A GeV/$c$($\sqrt{s_{NN}}$ = 16.8 GeV) from NA61/SHINEs and Pb+Pb peripheral collision data at 158 A GeV/$c$ ($\sqrt{s_{NN}}$ = 17.3 GeV) obtained by the NA49 experiment at the CERN SPS. The present implications of the new data from NA61/SHINE for the space-time evolution of the system will be discussed.

Collaboration / Activity NA61/SHINE sneha.rajaram.bhosale@cern.ch Sneha Bhosale

### Primary author

Sneha Bhosale (IFJ PAN)

### Co-author

Andrzej Rybicki (Institute of Nuclear Physics Polish Academy of Sciences)