Enhancement of photon emission rate near QCD critical point
Fuente:
arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
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| _version_ | 1866912904978104320 |
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| author | Akamatsu, Yukinao Asakawa, Masayuki Hongo, Masaru Stephanov, Mikhail Yee, Ho-Ung |
| author_facet | Akamatsu, Yukinao Asakawa, Masayuki Hongo, Masaru Stephanov, Mikhail Yee, Ho-Ung |
| contents | We compute photon emission rate enhancement near the QCD critical point using an effective theory of dynamic critical phenomena and derive a universal photon spectrum. The emission rate scales similarly to conductivity, increasing with the correlation length ($ξ$), diverging at the critical point. The spectrum exhibits $ωdN_γ/d^3k \propto ω^{-1/2}$ in the scaling regime, with the transition occurring at a frequency comparable to shear damping rate $ω\sim γ_η/ξ^2$, reflecting the nonequilibrium properties of the near-critical liquid. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_07169 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Enhancement of photon emission rate near QCD critical point Akamatsu, Yukinao Asakawa, Masayuki Hongo, Masaru Stephanov, Mikhail Yee, Ho-Ung High Energy Physics - Phenomenology Statistical Mechanics High Energy Physics - Theory Nuclear Experiment Nuclear Theory We compute photon emission rate enhancement near the QCD critical point using an effective theory of dynamic critical phenomena and derive a universal photon spectrum. The emission rate scales similarly to conductivity, increasing with the correlation length ($ξ$), diverging at the critical point. The spectrum exhibits $ωdN_γ/d^3k \propto ω^{-1/2}$ in the scaling regime, with the transition occurring at a frequency comparable to shear damping rate $ω\sim γ_η/ξ^2$, reflecting the nonequilibrium properties of the near-critical liquid. |
| title | Enhancement of photon emission rate near QCD critical point |
| topic | High Energy Physics - Phenomenology Statistical Mechanics High Energy Physics - Theory Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2505.07169 |