{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/suppression-of-1520-resonance-production-in","title":"Suppression of $Λ(1520)$ resonance production in central Pb-Pb collisions at $\\sqrt{s_{\\rm NN}}$ = 2.76 TeV","arxiv_id":"1805.04361","date":"2018-05-11","proceeding":null,"authors":["ALICE Collaboration"],"abstract":"The production yield of the $\\Lambda(1520)$ baryon resonance is measured at mid-rapidity in Pb-Pb collisions at $\\sqrt{s_{\\rm NN}}$ = 2.76 TeV with the ALICE detector at the LHC. The measurement is performed in the $\\Lambda(1520)\\rightarrow {\\rm pK}^{-}$ (and charge conjugate) hadronic decay channel as a function of the transverse momentum ($p_{\\rm T}$) and collision centrality. The $p_{\\rm T}$-integrated production rate of $\\Lambda(1520)$ relative to $\\Lambda$ in central collisions is suppressed by about a factor of 2 with respect to peripheral collisions. This is the first observation of the suppression of a baryonic resonance at the LHC and the first 3$\\sigma$ evidence of $\\Lambda(1520)$ suppression within a single collision system. The measured $\\Lambda(1520)/\\Lambda$ ratio in central collisions is smaller than the value predicted by the statistical hadronisation model calculations. The shape of the measured $p_{\\rm T}$ distribution and the centrality dependence of the suppression are reproduced by the EPOS3 Monte Carlo event generator. The measurement adds further support to the formation of a dense hadronic phase in the final stages of the evolution of the fireball created in heavy-ion collisions, lasting long enough to cause a significant reduction in the observable yield of short-lived resonances.","url_abs":"http://arxiv.org/abs/1805.04361v1","url_pdf":"http://arxiv.org/pdf/1805.04361v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"suppression-of-1520-resonance-production-in","repo_url":"https://github.com/vlvovch/thermus-decays-fix","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}