The effect of charm quark on the QCD chiral phase diagram
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| Format: | Preprint |
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2026
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| _version_ | 1866915841824522240 |
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| author | Gao, Fei Guan, Yuepeng Matsuzaki, Shinya |
| author_facet | Gao, Fei Guan, Yuepeng Matsuzaki, Shinya |
| contents | We study the influence of charm quark dynamics on the chiral phase structure of Quantum Chromodynamics (QCD) using the recently developed miniDSE scheme of the Dyson-Schwinger equations. By calculating the quark propagator in $2+1$ and $2+1+1$ flavor QCD, we quantify the impact of including the charm quark as a dynamical degree of freedom on the QCD phase diagram. Our results show that the charm quark induces a moderate but noticeable shift to lower chemical potential in the location of the critical endpoint (CEP) by approximately 2-3%. The result in this work indicates that the heavy-flavor dynamics can subtly influence the QCD phase structure and should be taken into account in particular for searching the CEP of QCD. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_04728 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The effect of charm quark on the QCD chiral phase diagram Gao, Fei Guan, Yuepeng Matsuzaki, Shinya High Energy Physics - Phenomenology High Energy Physics - Theory We study the influence of charm quark dynamics on the chiral phase structure of Quantum Chromodynamics (QCD) using the recently developed miniDSE scheme of the Dyson-Schwinger equations. By calculating the quark propagator in $2+1$ and $2+1+1$ flavor QCD, we quantify the impact of including the charm quark as a dynamical degree of freedom on the QCD phase diagram. Our results show that the charm quark induces a moderate but noticeable shift to lower chemical potential in the location of the critical endpoint (CEP) by approximately 2-3%. The result in this work indicates that the heavy-flavor dynamics can subtly influence the QCD phase structure and should be taken into account in particular for searching the CEP of QCD. |
| title | The effect of charm quark on the QCD chiral phase diagram |
| topic | High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2603.04728 |