This paper presents the measurement of charged-hadron and identified-hadron (KS0, Λ, Ξ−) yields in photonuclear collisions using 1.7 nb−1 of (Formula presented.) TeV Pb + Pb data collected in 2018 with the ATLAS detector at the Large Hadron Collider. Candidate photonuclear events are selected using a combination of tracking and calorimeter information, including the zero-degree calorimeter. The yields as a function of transverse momentum and rapidity are measured in these photonuclear collisions as a function of charged-particle multiplicity. These photonuclear results are compared with 0.1 nb−1 of (Formula presented.) TeV p + Pb data collected in 2016 by ATLAS using similar charged-particle multiplicity selections. These photonuclear measurements shed light on potential quark-gluon plasma formation in photonuclear collisions via observables sensitive to radial flow, enhanced baryon-to-meson ratios, and strangeness enhancement. The results are also compared with the Monte Carlo DPMJET-III generator and hydrodynamic calculations to test whether such photonuclear collisions may produce small droplets of quark-gluon plasma that flow collectively.

Charged-hadron and identified-hadron ( K S 0 ,   Λ ,   Ξ − ) yield measurements in photonuclear Pb + Pb and p + Pb collisions at s N N = 5.02 TeV with ATLAS

Carrá, S.;Cresta, T.;Gaudio, G.;Introzzi, G.;Manco, G.;Negri, A.;Pareti, A.;Rebuzzi, D. M.;Romano, E.;
2025-01-01

Abstract

This paper presents the measurement of charged-hadron and identified-hadron (KS0, Λ, Ξ−) yields in photonuclear collisions using 1.7 nb−1 of (Formula presented.) TeV Pb + Pb data collected in 2018 with the ATLAS detector at the Large Hadron Collider. Candidate photonuclear events are selected using a combination of tracking and calorimeter information, including the zero-degree calorimeter. The yields as a function of transverse momentum and rapidity are measured in these photonuclear collisions as a function of charged-particle multiplicity. These photonuclear results are compared with 0.1 nb−1 of (Formula presented.) TeV p + Pb data collected in 2016 by ATLAS using similar charged-particle multiplicity selections. These photonuclear measurements shed light on potential quark-gluon plasma formation in photonuclear collisions via observables sensitive to radial flow, enhanced baryon-to-meson ratios, and strangeness enhancement. The results are also compared with the Monte Carlo DPMJET-III generator and hydrodynamic calculations to test whether such photonuclear collisions may produce small droplets of quark-gluon plasma that flow collectively.
2025
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Particle Physics, High Energy Physics
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info:eu-repo/semantics/article
262
Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abulaiti, Y...espandi
1 Contributo su Rivista::1.1 Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/1555555
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