We determine the probability distributions of the shear viscosity over the entropy density ratio in the quark-gluon plasma formed in Au + Au collisions at , and , using Bayesian inference and Gaussian process emulators for a model-to-data statistical analysis that probes the full input parameter space of a transport + viscous hydrodynamics hybrid model. We find the most likely value of to be larger at smaller , although the uncertainties still allow for a constant value between 0.10 and 0.15 for the investigated collision energy range.
{ "_oai": { "updated": "2022-03-04T11:14:32Z", "id": "oai:repo.scoap3.org:40019", "sets": [ "PRC" ] }, "authors": [ { "raw_name": "Jussi Auvinen", "affiliations": [ { "country": "USA", "value": "Department of Physics, Duke University, Durham, North Carolina 27708, USA" } ], "surname": "Auvinen", "given_names": "Jussi", "full_name": "Auvinen, Jussi" }, { "raw_name": "Jonah E. Bernhard", "affiliations": [ { "country": "USA", "value": "Department of Physics, Duke University, Durham, North Carolina 27708, USA" } ], "surname": "Bernhard", "given_names": "Jonah E.", "full_name": "Bernhard, Jonah E." }, { "raw_name": "Steffen A. Bass", "affiliations": [ { "country": "USA", "value": "Department of Physics, Duke University, Durham, North Carolina 27708, USA" } ], "surname": "Bass", "given_names": "Steffen A.", "full_name": "Bass, Steffen A." }, { "raw_name": "Iurii Karpenko", "affiliations": [ { "country": "Italy", "value": "INFN - Sezione di Firenze, I-50019 Sesto Fiorentino, Firenze, Italy" } ], "surname": "Karpenko", "given_names": "Iurii", "full_name": "Karpenko, Iurii" } ], "titles": [ { "source": "APS", "title": "Investigating the collision energy dependence of <math><mrow><mi>\u03b7</mi><mo>/</mo><mi>s</mi></mrow></math> in the beam energy scan at the BNL Relativistic Heavy Ion Collider using Bayesian statistics" } ], "dois": [ { "value": "10.1103/PhysRevC.97.044905" } ], "publication_info": [ { "journal_volume": "97", "journal_title": "Physical Review C", "material": "article", "journal_issue": "4", "year": 2018 } ], "$schema": "http://repo.scoap3.org/schemas/hep.json", "acquisition_source": { "date": "2020-06-29T15:23:10.273845", "source": "APS", "method": "APS", "submission_number": "bca49440b8c511eaad8602163e01809a" }, "page_nr": [ 19 ], "license": [ { "url": "https://creativecommons.org/licenses/by/4.0/", "license": "CC-BY-4.0" } ], "copyright": [ { "statement": "Published by the American Physical Society", "year": "2018" } ], "control_number": "40019", "record_creation_date": "2018-06-08T06:07:29.828960", "_files": [ { "checksum": "md5:ad04c79b783fa0a0cf6ee38ecf954258", "filetype": "pdf", "bucket": "d223f57d-0c08-4d2b-b931-3cee7dd51bf8", "version_id": "d55a3674-65fd-465f-9db4-0a7d5f2ba874", "key": "10.1103/PhysRevC.97.044905.pdf", "size": 2211932 }, { "checksum": "md5:af744d98e14dd19f251adbf12f1d2950", "filetype": "xml", "bucket": "d223f57d-0c08-4d2b-b931-3cee7dd51bf8", "version_id": "4ccfd0aa-f552-4bad-b2d9-7f2da3d88b59", "key": "10.1103/PhysRevC.97.044905.xml", "size": 243422 } ], "collections": [ { "primary": "HEP" }, { "primary": "Citeable" }, { "primary": "Published" } ], "arxiv_eprints": [ { "categories": [ "hep-ph" ], "value": "1706.03666" } ], "abstracts": [ { "source": "APS", "value": "We determine the probability distributions of the shear viscosity over the entropy density ratio <math><mrow><mi>\u03b7</mi><mo>/</mo><mi>s</mi></mrow></math> in the quark-gluon plasma formed in Au + Au collisions at <math><mrow><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt><mo>=</mo><mn>19.6</mn><mo>,</mo><mspace width=\"0.16em\"></mspace><mn>39</mn></mrow></math>, and <math><mrow><mn>62.4</mn><mspace width=\"0.16em\"></mspace><mi>GeV</mi></mrow></math>, using Bayesian inference and Gaussian process emulators for a model-to-data statistical analysis that probes the full input parameter space of a transport + viscous hydrodynamics hybrid model. We find the most likely value of <math><mrow><mi>\u03b7</mi><mo>/</mo><mi>s</mi></mrow></math> to be larger at smaller <math><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt></math>, although the uncertainties still allow for a constant value between 0.10 and 0.15 for the investigated collision energy range." } ], "imprints": [ { "date": "2018-04-13", "publisher": "APS" } ] }