High-order temperature fluctuations in hot and dense QCD matter from multi-charge holography
Abstract
We investigate temperature cumulants from second to sixth order across the QCD phase diagram using a lattice-calibrated multi-charge Einstein--Maxwells--dilaton model under heavy-ion charge constraints. Near the model's critical end point at (μB,T)≃(547,112)~MeV, the enhanced heat capacity produces a local suppression of the temperature variance. The higher-order cumulants develop sign reversals on the high-temperature side of the transition, with the onset moving to lower baryon chemical potentials as the order increases. Ratios of different cumulant orders provide a consistency check of the expected mean-field critical behavior. At fixed chemical potentials, their limits on both sides of the critical point agree with the predictions for the critical-isotherm exponent δ=3. The freeze-out analysis reveals nonmonotonic collision-energy dependence that need not be accompanied by sign reversals. On a representative trajectory, the variance reaches a local minimum near √(sNN)≃6~GeV, with its position and depth depending on the freeze-out path. Temperature cumulants probe the thermal response and its critical scaling, providing information complementary to conserved-charge fluctuations for exploring the QCD phase diagram.
Related
- Unconventional charge density wave order in ErTe3: symmetry breakings and fluctuations probed by Raman scattering
- Hagedorn temperature from holography: rotating and charged systems
- Hagedorn temperature from holography: rotating and charged systems
- Irrationality Measure Controls Long-Wavelength Charge Fluctuations in Quasiperiodic Systems
- Inducing Enantioselectivity in Radiative Charge-Transfer Rates through Chiral Quantum Electrodynamic Fluctuations.
BibTeX
@misc{chen2026highorder,
title = {{High-order temperature fluctuations in hot and dense QCD matter from multi-charge holography}},
author = {Yidian Chen and Peiyu Yan and Zhibin Li},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.34414},
eprint = {2610.34414},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.34414},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - High-order temperature fluctuations in hot and dense QCD matter from multi-charge holography
AU - Yidian Chen
AU - Peiyu Yan
AU - Zhibin Li
PY - 2026
DA - 2026/10/25
PB - arXiv
DO - 10.48550/arxiv.2610.34414
UR - https://arxiv.org/abs/2610.34414
AB - We investigate temperature cumulants from second to sixth order across the QCD phase diagram using a lattice-calibrated multi-charge Einstein--Maxwells--dilaton model under heavy-ion charge constraints. Near the model's critical end point at (μ_B,T)≃(547,112)~MeV, the enhanced heat capacity produces a local suppression of the temperature variance. The higher-order cumulants develop sign reversals on the high-temperature side of the transition, with the onset moving to lower baryon chemical potentials as the order increases. Ratios of different cumulant orders provide a consistency check of the expected mean-field critical behavior. At fixed chemical potentials, their limits on both sides of the critical point agree with the predictions for the critical-isotherm exponent δ=3. The freeze-out analysis reveals nonmonotonic collision-energy dependence that need not be accompanied by sign reversals. On a representative trajectory, the variance reaches a local minimum near √(s_NN)≃6~GeV, with its position and depth depending on the freeze-out path. Temperature cumulants probe the thermal response and its critical scaling, providing information complementary to conserved-charge fluctuations for exploring the QCD phase diagram.
ER -