Probing quantum entanglement in hadronic collisions: multiplicity distributions in proton-lead collisions
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| Author(s): |
Eliana Paula Romero Marroquin
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Física (IF/SBI) |
| Defense date: | 2024-01-31 |
| Examining board members: |
Marcelo Gameiro Munhoz;
David Dobrigkeit Chinellato;
Magno Valerio Trindade Machado
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| Advisor: | Marcelo Gameiro Munhoz |
| Abstract | |
In light of recent research connecting parton entanglement entropy and multiplicity dis- tribution measurements, this work aims to study quantum entanglement in hadronic collisions, with a primary focus on proton-lead (p-Pb) interactions. A complete data anal- ysis of ALICE (CERN) p-Pb collisions at square_root{sNN} = 5.02 TeV was performed, extracting charged-particle multiplicity distributions within the pseudorapidity intervals, |eta| < 0.5 and |eta| < 1.0; a measurement previously unreported by the ALICE collaboration. The multiplicity analysis was developed within the AliPhysics framework, where the main ALICE detector used is the Silicon Pixel Detector (SPD) due to the track-counting algorithm SPD tracklets. The analysis enables the computation of the final-state entropy from the extracted distributions for two eta ranges in this particular energy. To explore the initial-state entropy in p-Pb collisions at 5.02 TeV, nuclear parton density functions were generated through the LHAPDF library, and the entropy was evaluated using the integrated distribution. Furthermore, the study successfully reproduced the analysis of entropies using CMS proton-proton (pp) multiplicity distributions by Z. Tu, D. Kharzeev, and T. Ullrich, now including seaquark contributions and gluon density in calculating the initial-state entropy. This work unfolds along two avenues: it provides multiplicity distribution data on p-Pb collisions with ALICE and supports further research on quantum phenomena in high-energy collisions. (AU) | |
| FAPESP's process: | 21/04438-7 - Quantum Entanglement in Relativistic Heavy Ion Collisions |
| Grantee: | Eliana Paula Romero Marroquin |
| Support Opportunities: | Scholarships in Brazil - Master |