The thermal proton yield anomaly in Pb-Pb collisions at the LHC and its resolution

Anton Andronic (Institut für Kernphysik, Universität Münster, Münster, Germany) ; Peter Braun-Munzinger (Extreme Matter Institute EMMI, GSI-Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany; Physikalisches Institut der Universität Heidelberg, Heidelberg, Germany; Institute of Particle Physics, Key Laboratory of Quark and Lepton Physics (MOE), Central China Normal University, Wuhan, China) ; Bengt Friman (GSI, Helmholzzentrum für Schwerionenforschung, Darmstadt, Germany) ; Pok Man Lo (Institute of Theoretical Physics, University of Wroclaw, Wrocław, Poland) ; Krzysztof Redlich (Institute of Theoretical Physics, University of Wroclaw, Wrocław, Poland; Fakultät für Physik, Universität Bielefeld, Bielefeld, Germany; Extreme Matter Institute EMMI, GSI-Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany) ; et al. - Show all 6 authors

We propose a resolution of the discrepancy between the proton yield predicted by the statistical hadronization approach and data on hadron production in ultra-relativistic nuclear collisions at the LHC. Applying the S-matrix formulation of statistical mechanics to include pion-nucleon interactions, we reexamine their contribution to the proton yield, taking resonance widths and the presence of nonresonant correlations into account. The effect of multi-pion-nucleon interactions is estimated using lattice QCD results on the baryon-charge susceptibility. We show that a consistent implementation of these features in the statistical hadronization model, leads to a reduction of the predicted proton yield, which then quantitatively matches data of the ALICE collaboration for Pb-Pb collisions at the LHC.

{
  "_oai": {
    "updated": "2019-06-11T12:56:29Z", 
    "id": "oai:repo.scoap3.org:46552", 
    "sets": [
      "PLB"
    ]
  }, 
  "authors": [
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Institut f\u00fcr Kernphysik, Universit\u00e4t M\u00fcnster, M\u00fcnster, Germany"
        }
      ], 
      "surname": "Andronic", 
      "given_names": "Anton", 
      "full_name": "Andronic, Anton"
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Extreme Matter Institute EMMI, GSI-Helmholtzzentrum f\u00fcr Schwerionenforschung, Darmstadt, Germany"
        }, 
        {
          "country": "Germany", 
          "value": "Physikalisches Institut der Universit\u00e4t Heidelberg, Heidelberg, Germany"
        }, 
        {
          "country": "China", 
          "value": "Institute of Particle Physics, Key Laboratory of Quark and Lepton Physics (MOE), Central China Normal University, Wuhan, China"
        }
      ], 
      "surname": "Braun-Munzinger", 
      "given_names": "Peter", 
      "full_name": "Braun-Munzinger, Peter"
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "GSI, Helmholzzentrum f\u00fcr Schwerionenforschung, Darmstadt, Germany"
        }
      ], 
      "surname": "Friman", 
      "given_names": "Bengt", 
      "full_name": "Friman, Bengt"
    }, 
    {
      "surname": "Lo", 
      "given_names": "Pok Man", 
      "affiliations": [
        {
          "country": "Poland", 
          "value": "Institute of Theoretical Physics, University of Wroclaw, Wroc\u0142aw, Poland"
        }
      ], 
      "full_name": "Lo, Pok Man", 
      "orcid": "0000-0002-2866-7996", 
      "email": "pmlo@gsi.de"
    }, 
    {
      "affiliations": [
        {
          "country": "Poland", 
          "value": "Institute of Theoretical Physics, University of Wroclaw, Wroc\u0142aw, Poland"
        }, 
        {
          "country": "Germany", 
          "value": "Fakult\u00e4t f\u00fcr Physik, Universit\u00e4t Bielefeld, Bielefeld, Germany"
        }, 
        {
          "country": "Germany", 
          "value": "Extreme Matter Institute EMMI, GSI-Helmholtzzentrum f\u00fcr Schwerionenforschung, Darmstadt, Germany"
        }
      ], 
      "surname": "Redlich", 
      "given_names": "Krzysztof", 
      "full_name": "Redlich, Krzysztof"
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Physikalisches Institut der Universit\u00e4t Heidelberg, Heidelberg, Germany"
        }, 
        {
          "country": "Germany", 
          "value": "Extreme Matter Institute EMMI, GSI-Helmholtzzentrum f\u00fcr Schwerionenforschung, Darmstadt, Germany"
        }
      ], 
      "surname": "Stachel", 
      "given_names": "Johanna", 
      "full_name": "Stachel, Johanna"
    }
  ], 
  "titles": [
    {
      "source": "Elsevier", 
      "title": "The thermal proton yield anomaly in Pb-Pb collisions at the LHC and its resolution"
    }
  ], 
  "dois": [
    {
      "value": "10.1016/j.physletb.2019.03.052"
    }
  ], 
  "publication_info": [
    {
      "page_end": "309", 
      "journal_title": "Physics Letters B", 
      "material": "article", 
      "journal_volume": "792 C", 
      "artid": "34541", 
      "year": 2019, 
      "page_start": "304"
    }
  ], 
  "$schema": "http://repo.scoap3.org/schemas/hep.json", 
  "acquisition_source": {
    "date": "2019-06-11T12:27:31.033097", 
    "source": "Elsevier", 
    "method": "Elsevier", 
    "submission_number": "7be9c0a08c2b11e9a46302163e01809a"
  }, 
  "page_nr": [
    6
  ], 
  "license": [
    {
      "url": "http://creativecommons.org/licenses/by/3.0/", 
      "license": "CC-BY-3.0"
    }
  ], 
  "copyright": [
    {
      "holder": "The Author(s)", 
      "statement": "The Author(s)", 
      "year": "2019"
    }
  ], 
  "control_number": "46552", 
  "record_creation_date": "2019-04-02T14:30:18.081641", 
  "_files": [
    {
      "checksum": "md5:9a53b0798c79e2c2b7d4e509173c1666", 
      "filetype": "xml", 
      "bucket": "332fc9a7-7741-42b8-bb2b-8cdf5c7a6515", 
      "version_id": "1ca50067-8c9d-4723-a049-1cfced9abe7f", 
      "key": "10.1016/j.physletb.2019.03.052.xml", 
      "size": 97340
    }, 
    {
      "checksum": "md5:4bd64f7fdc2e249b98ed276607072031", 
      "filetype": "pdf", 
      "bucket": "332fc9a7-7741-42b8-bb2b-8cdf5c7a6515", 
      "version_id": "da439c4b-1dbe-47f8-835a-3b5ad1843fac", 
      "key": "10.1016/j.physletb.2019.03.052.pdf", 
      "size": 518645
    }, 
    {
      "checksum": "md5:ebb503524f0c90ba4e5d7cdcdcc7f55a", 
      "filetype": "pdf/a", 
      "bucket": "332fc9a7-7741-42b8-bb2b-8cdf5c7a6515", 
      "version_id": "e7a837d7-65b7-48ae-b521-190238dfab8b", 
      "key": "10.1016/j.physletb.2019.03.052_a.pdf", 
      "size": 865542
    }
  ], 
  "collections": [
    {
      "primary": "Physics Letters B"
    }
  ], 
  "abstracts": [
    {
      "source": "Elsevier", 
      "value": "We propose a resolution of the discrepancy between the proton yield predicted by the statistical hadronization approach and data on hadron production in ultra-relativistic nuclear collisions at the LHC. Applying the S-matrix formulation of statistical mechanics to include pion-nucleon interactions, we reexamine their contribution to the proton yield, taking resonance widths and the presence of nonresonant correlations into account. The effect of multi-pion-nucleon interactions is estimated using lattice QCD results on the baryon-charge susceptibility. We show that a consistent implementation of these features in the statistical hadronization model, leads to a reduction of the predicted proton yield, which then quantitatively matches data of the ALICE collaboration for Pb-Pb collisions at the LHC."
    }
  ], 
  "imprints": [
    {
      "date": "2019-04-02", 
      "publisher": "Elsevier"
    }
  ]
}
Published on:
02 April 2019
Publisher:
Elsevier
Published in:
Physics Letters B , Volume 792 C (2019)

Pages 304-309
DOI:
https://doi.org/10.1016/j.physletb.2019.03.052
Copyrights:
The Author(s)
Licence:
CC-BY-3.0

Fulltext files: