Heavy-Quark Dynamics from D0-Meson Anisotropy-Response Scaling Violations
Abstract
A species-resolved anisotropy-response scaling framework is used to investigate heavy-quark dynamics through the elliptic (v2) and triangular (v3) azimuthal anisotropies of D0 mesons. The independently constrained light-flavor response provides a direct null test: the transformed D0 harmonics exhibit approximate inter-harmonic closure but remain systematically displaced from the kaon-anchored scaling function, revealing a charm scaling violation. The common response is recovered through a charm-specific attenuation rescaling, kc, together with a small low-pT hadronic-rescattering correction, ζhs≃0.06, while retaining the established light-flavor prescription. In Pb+Pb collisions at √(sNN)=5.02~TeV, kc decreases from approximately $2.0$ in central and mid-central collisions to $1.27$ in the 30--50\% interval. For D0 v2, ultra-central p+Pb collisions at √(sNN)=8.16~TeV require kc≃1.5, whereas Au+Au collisions at √(sNN)=200~GeV are consistent with kc≃1. The transition momentum exhibits a distinct system dependence: D0 and light mesons show comparable pT,tr≃4.5--$5.0GeV/c$ in Pb+Pb, consistent with the common large-system prescription also used in Au+Au, whereas p+Pb D0 measurements are consistent with the lower light-meson scale of approximately $1.6GeV/c$. These complementary constraints on attenuation strength and transition momentum provide a differential benchmark for heavy-quark transport and medium evolution.
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BibTeX
@misc{lacey2026heavyquark,
title = {{Heavy-Quark Dynamics from $D^0$-Meson Anisotropy-Response Scaling Violations}},
author = {Roy A. Lacey},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.30085},
eprint = {2610.30085},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.30085},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Heavy-Quark Dynamics from D^0-Meson Anisotropy-Response Scaling Violations
AU - Roy A. Lacey
PY - 2026
DA - 2026/10/21
PB - arXiv
DO - 10.48550/arxiv.2610.30085
UR - https://arxiv.org/abs/2610.30085
AB - A species-resolved anisotropy-response scaling framework is used to investigate heavy-quark dynamics through the elliptic (v_2) and triangular (v_3) azimuthal anisotropies of D^0 mesons. The independently constrained light-flavor response provides a direct null test: the transformed D^0 harmonics exhibit approximate inter-harmonic closure but remain systematically displaced from the kaon-anchored scaling function, revealing a charm scaling violation. The common response is recovered through a charm-specific attenuation rescaling, k_c, together with a small low-p_T hadronic-rescattering correction, ζ_hs≃0.06, while retaining the established light-flavor prescription. In Pb+Pb collisions at √(s_NN)=5.02~TeV, k_c decreases from approximately $2.0$ in central and mid-central collisions to $1.27$ in the 30--50\% interval. For D^0 v_2, ultra-central p+Pb collisions at √(s_NN)=8.16~TeV require k_c≃1.5, whereas Au+Au collisions at √(s_NN)=200~GeV are consistent with k_c≃1. The transition momentum exhibits a distinct system dependence: D^0 and light mesons show comparable p_T,tr≃4.5--$5.0GeV/c$ in Pb+Pb, consistent with the common large-system prescription also used in Au+Au, whereas p+Pb D^0 measurements are consistent with the lower light-meson scale of approximately $1.6GeV/c$. These complementary constraints on attenuation strength and transition momentum provide a differential benchmark for heavy-quark transport and medium evolution.
ER -