| Thesis | |
| Report number | CERN-THESIS-2023-286 |
| Title | Spectator-induced electromagnetic effects in $^{40}$Ar+$^{45}$Sc collisions at 40$A$ GeV/$c$ beam momentum |
| Translation of title | Efekty elektromagnetyczne wywołane przez układy spektatorów w zderzeniach $^{40}$Ar+$^{45}$Sc przy pędzie wiązki 40$A$ GeV/$c$ |
| Author(s) | Bhosale, Sneha Rajaram (Cracow, INP) |
| Publication | 122. |
| Thesis note | PhD : Cracow, INP : 2023-06-05 |
| Thesis supervisor(s) | Rybicki, Andrzej Krzysztof |
| Note | Presented 29 Nov 2023 |
| Subject category | Nuclear Physics - Experiment ; Detectors and Experimental Techniques |
| Accelerator/Facility, Experiment | CERN SPS ; SHINE NA61 |
| Abstract | The SPS Heavy Ion and Neutrino Experiment (NA61/SHINE) at CERN is a scientific endeavour aimed at scrutinizing the characteristics of hadron production in hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions. In this doctoral dissertation, a comprehensive experimental study of spectator-induced electromagnetic (EM) effects in Ar+Sc collisions at 40$A$ GeV/$c$ ($\sqrt{s_{NN}}$ = 8.76 GeV) is presented. The study is carried out by analyzing the modification of charged pion ($\pi^{+}/\pi^{-}$) ratios as a function of the Feynman variable $x_F$, transverse momentum $p_T$, and collision centrality. The experimental analysis presented herein demonstrates the presence of spectator-induced EM effects in small-scale nuclear collision systems at SPS energies. With increasing peripherality of the collision, the EM distortion of $\pi^{+}/\pi^{-}$ ratios increases as a function of increasing spectator charge. The study presented in this dissertation enhances our understanding of the interplay between EM and isospin effects in the collision. Also, it includes a comparative analysis between current Ar+Sc results and earlier results from the NA49 experiment's Pb+Pb data for peripheral collisions at 158$A$ GeV/$c$ ($\sqrt{s_{NN}}$ = 17.3 GeV) obtained at the SPS. This analysis is supplemented by a discussion of the qualitative similarities and quantitative differences in EM effects in Ar+Sc and Pb+Pb collisions. Finally, acknowledging that these effects can shed new light on the space-time evolution of particle production, the study incorporates a dedicated Monte Carlo model simulation to explore this evolution. |
Corresponding record in: Inspire
Email contact: sneha.rajaram.bhosale@cern.ch
Record created 2023-12-13, last modified 2024-11-22