The pseudorapidity (𝜂) distributions of charged hadrons are measured using data collected at the highest ever nucleon-nucleon center-of-mass energy of √𝑠NN = 5.36 TeV for collisions of lead-lead ions. The data were recorded by the CMS experiment at the LHC in 2022 and correspond to an integrated luminosity of 0.30 ± 0.03 ÎŒb−1. Using the CMS silicon pixel detector, the yields of primary charged hadrons produced in the range |𝜂| < 2.6 are reported. The evolution of the midrapidity particle density as a function of collision centrality is also reported. In the 5% most central collisions, the charged-hadron 𝜂 density in the range |𝜂| < 0.5 is found to be 2032 ± 91 (syst), with negligible statistical uncertainty. This result is consistent with an extrapolation from nucleus-nucleus collision data at lower center-of-mass energies. Comparisons are made to various Monte Carlo event generators and to previous measurements of lead-lead and xenon-xenon collisions at similar collision energies. These new data detail the dependence of particle production on the collision energy, initial collision geometry, and the size of the colliding nuclei.

Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., et al. (2025). Pseudorapidity distributions of charged hadrons in lead-lead collisions at √𝑠 NN = 5.36 TeV. PHYSICS LETTERS. SECTION B, 861, 1-25 [10.1016/j.physletb.2025.139279].

Pseudorapidity distributions of charged hadrons in lead-lead collisions at √𝑠 NN = 5.36 TeV

Battilana, C.;Bonacorsi, D.;Castro, A.;Cuffiani, M.;Diotalevi, T.;Fanfani, A.;Giommi, L.;Guiducci, L.;Lorusso, M.;Lunerti, L.;Paggi, G.;Rossi Tisbeni, S.;Rovelli, T.;Siroli, G. P.;
2025

Abstract

The pseudorapidity (𝜂) distributions of charged hadrons are measured using data collected at the highest ever nucleon-nucleon center-of-mass energy of √𝑠NN = 5.36 TeV for collisions of lead-lead ions. The data were recorded by the CMS experiment at the LHC in 2022 and correspond to an integrated luminosity of 0.30 ± 0.03 ÎŒb−1. Using the CMS silicon pixel detector, the yields of primary charged hadrons produced in the range |𝜂| < 2.6 are reported. The evolution of the midrapidity particle density as a function of collision centrality is also reported. In the 5% most central collisions, the charged-hadron 𝜂 density in the range |𝜂| < 0.5 is found to be 2032 ± 91 (syst), with negligible statistical uncertainty. This result is consistent with an extrapolation from nucleus-nucleus collision data at lower center-of-mass energies. Comparisons are made to various Monte Carlo event generators and to previous measurements of lead-lead and xenon-xenon collisions at similar collision energies. These new data detail the dependence of particle production on the collision energy, initial collision geometry, and the size of the colliding nuclei.
2025
Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., et al. (2025). Pseudorapidity distributions of charged hadrons in lead-lead collisions at √�� NN = 5.36 TeV. PHYSICS LETTERS. SECTION B, 861, 1-25 [10.1016/j.physletb.2025.139279].
Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P. S.; Jeitler, M.;...espandi
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0370269325000395-main.pdf

accesso aperto

Tipo: Versione (PDF) editoriale / Version Of Record
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 3.74 MB
Formato Adobe PDF
3.74 MB Adobe PDF Visualizza/Apri
1-s2.0-S0370269325000395-mmc1.pdf

accesso aperto

Tipo: File Supplementare
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 59.32 kB
Formato Adobe PDF
59.32 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1045174
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 3
  • OpenAlex ND
social impact