Two-particle Bose-Einstein correlations and their Lévy parameters in PbPb collisions at <math><mrow><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt><mo>=</mo><mn>5.02</mn></mrow></math> TeV

Benecke, Anna;Bruno, Giacomo;Bury, Florian;Caputo, Claudio;Bethani, Agni;et.al.
(2024) Physical Review C — Vol. 109 (2024)

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Authors
  • Benecke, AnnaUCLouvain
    Author
  • Bruno, GiacomoUCLouvain
    Author
  • Bury, FlorianUCLouvain
    Author
  • Caputo, ClaudioUCLouvain
    Author
  • David, PieterUCLouvain
    Author
  • Delaere, Christopheorcid-logoUCLouvain
    Author
  • Donertas, Izzeddin SuatUCLouvain
    Author
  • Giammanco, AndreaUCLouvain
    Author
  • Jaffel, KhawlaUCLouvain
    Author
  • Jain, SandhyaUCLouvain
    Author
  • Jain, SandhyaUCLouvain
    Author
  • Lemaitre, VincentUCLouvain
    Author
  • Mondal, KuntalUCLouvain
    Author
  • Taliercio, AngelaUCLouvain
    Author
  • Tran, Tu ThongUCLouvain
    Author
  • Vischia, PietroUCLouvain
    Author
  • Wertz, SébastienUCLouvain
    Author
  • Bethani, Agniorcid-logoUCLouvain
    Author
  • et. al.
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Abstract
Two-particle Bose–Einstein momentum correlation functions are studied for charged-hadron pairs in lead-lead collisions at a center-of-mass energy per nucleon pair of <math><mrow><msqrt><msub><mi>s</mi><mi>NN</mi></msub></msqrt><mo>=</mo><mn>5.02</mn><mspace width="4pt"/><mi>TeV</mi></mrow></math>. The data sample, containing <math><mrow><mn>4.27</mn><mo>×</mo><msup><mn>10</mn><mn>9</mn></msup></mrow></math> minimum bias events corresponding to an integrated luminosity of 0.607 <math><msup><mtext>nb</mtext><mrow><mo>−</mo><mn>1</mn></mrow></msup></math>, was collected by the CMS experiment in 2018. The experimental results are discussed in terms of a Lévy-type source distribution. The parameters of this distribution are extracted as functions of particle pair average transverse mass and collision centrality. These parameters include the Lévy index or shape parameter <math><mi>α</mi></math>, the Lévy scale parameter <math><mi>R</mi></math>, and the correlation strength parameter <math><mi>λ</mi></math>. The source shape, characterized by <math><mi>α</mi></math>, is found to be neither Cauchy nor Gaussian, implying the need for a full Lévy analysis. Similarly to what was previously found for systems characterized by Gaussian source radii, a hydrodynamical scaling is observed for the Lévy <math><mi>R</mi></math> parameter. The <math><mi>λ</mi></math> parameter is studied in terms of the core-halo model.
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Benecke, A., Bruno, G., Bury, F., Caputo, C., David, P., Delaere, C., Donertas, I. S., Giammanco, A., Jaffel, K., Jain, S., Jain, S., Lemaitre, V., Mondal, K., Taliercio, A., Tran, T. T., Vischia, P., Wertz, S., CMS, Bethani, A., & et al. (2024). Two-particle Bose-Einstein correlations and their Lévy parameters in PbPb collisions at <math><mrow><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt><mo>=</mo><mn>5.02</mn></mrow></math> TeV. Physical Review C, 109. https://doi.org/10.1103/PhysRevC.109.024914 (Original work published 2024)