{
  "_oai": {
    "updated": "2024-05-23T20:30:16Z", 
    "id": "oai:repo.scoap3.org:85710", 
    "sets": [
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    ]
  }, 
  "authors": [
    {
      "raw_name": "Mamiya Kawaguchi", 
      "affiliations": [
        {
          "country": "China", 
          "value": "School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China"
        }
      ], 
      "surname": "Kawaguchi", 
      "given_names": "Mamiya", 
      "full_name": "Kawaguchi, Mamiya"
    }, 
    {
      "raw_name": "Daiki Suenaga", 
      "affiliations": [
        {
          "country": "Japan", 
          "value": "Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0048, Japan"
        }, 
        {
          "country": "Japan", 
          "value": "Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya 464-8602, Japan"
        }
      ], 
      "surname": "Suenaga", 
      "given_names": "Daiki", 
      "full_name": "Suenaga, Daiki"
    }
  ], 
  "titles": [
    {
      "source": "APS", 
      "title": "Sound velocity peak induced by the chiral partner in dense two-color QCD"
    }
  ], 
  "dois": [
    {
      "value": "10.1103/PhysRevD.109.096034"
    }
  ], 
  "publication_info": [
    {
      "journal_volume": "109", 
      "journal_title": "Physical Review D", 
      "material": "article", 
      "journal_issue": "9", 
      "year": 2024
    }
  ], 
  "$schema": "http://repo.scoap3.org/schemas/hep.json", 
  "acquisition_source": {
    "date": "2024-05-23T20:30:07.240719", 
    "source": "APS", 
    "method": "APS", 
    "submission_number": "3a29764c194311efa96f6a3e651b8b98"
  }, 
  "page_nr": [
    14
  ], 
  "license": [
    {
      "url": "https://creativecommons.org/licenses/by/4.0/", 
      "license": "CC-BY-4.0"
    }
  ], 
  "copyright": [
    {
      "statement": "Published by the American Physical Society", 
      "year": "2024"
    }
  ], 
  "control_number": "85710", 
  "record_creation_date": "2024-05-23T16:30:06.808453", 
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      "version_id": "5fb7946b-0a41-4ba6-b81d-8446f5ae95e7", 
      "key": "10.1103/PhysRevD.109.096034.pdf", 
      "size": 495567
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  ], 
  "collections": [
    {
      "primary": "HEP"
    }, 
    {
      "primary": "Citeable"
    }, 
    {
      "primary": "Published"
    }
  ], 
  "arxiv_eprints": [
    {
      "categories": [
        "hep-ph", 
        "hep-lat", 
        "nucl-th"
      ], 
      "value": "2402.00430"
    }
  ], 
  "abstracts": [
    {
      "source": "APS", 
      "value": "Recently, the peak structure of the sound velocity was observed in the lattice simulation of two-color and two-flavor QCD at the finite quark chemical potential. The comparison with the chiral perturbation theory (ChPT) result was undertaken; however, the ChPT failed in reproducing the peak structure. In this study, to extend the ChPT framework, we incorporate contributions of the <math><mi>\u03c3</mi></math> meson, that is identified as the chiral partner of pions, on top of the low-energy pion dynamics by using the linear sigma model (LSM). Based on the LSM, we derive analytic expressions of the thermodynamic quantities as well as the sound velocity within a mean-field approximation. As a result, we find that those quantities are provided by sums of the ChPT results and corrections, where the latter is characterized by a mass difference between the chiral partners, the <math><mi>\u03c3</mi></math> meson and pion. The chiral partner contributions are found to yield a peak in the sound velocity successfully. We furthermore show that the sound velocity peak emerges only when <math><msub><mi>m</mi><mi>\u03c3</mi></msub><mo>&gt;</mo><msqrt><mn>3</mn></msqrt><msub><mi>m</mi><mi>\u03c0</mi></msub></math> and <math><msub><mi>\u03bc</mi><mi>q</mi></msub><mo>&gt;</mo><msub><mi>m</mi><mi>\u03c0</mi></msub></math>, with <math><msub><mi>m</mi><mrow><mi>\u03c3</mi><mo>(</mo><mi>\u03c0</mi><mo>)</mo></mrow></msub></math> and <math><msub><mi>\u03bc</mi><mi>q</mi></msub></math> being the <math><mi>\u03c3</mi></math> meson (pion) mass and the quark chemical potential, respectively. The correlation between the sound velocity peak and the sign of the trace anomaly is also addressed."
    }
  ], 
  "imprints": [
    {
      "date": "2024-05-23", 
      "publisher": "APS"
    }
  ]
}