Abstract We study D and D s mesons at finite temperature using an effective field theory based on chiral and heavy-quark spin-flavor symmetries within the imaginary-time formalism. Interactions with the light degrees of freedom are unitarized via a Bethe-Salpeter approach, and the D and D s self-energies are calculated self-consistently. We generate dynamically the D 0 ⁎ ( 2300 ) and D s ( 2317 ) states, and study their possible identification as the chiral partners of the D and D s ground states, respectively. We show the evolution of their masses and decay widths as functions of temperature, and provide an analysis of the chiral-symmetry restoration in the heavy-flavor sector below the transition temperature. In particular, we analyse the very special case of the D-meson, for which the chiral partner is associated to the double-pole structure of the D 0 ⁎ ( 2300 ) .

中文翻译：

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热介质对 D 介子及其手性伙伴的影响

摘要 我们在虚时间形式主义中使用基于手征和重夸克自旋对称性的有效场论研究了有限温度下的 D 和 D s 介子。与轻自由度的相互作用通过 Bethe-Salpeter 方法统一化，并且 D 和 D 的自能计算自洽。我们动态生成 D 0 ⁎ (2300) 和 D s (2317) 状态，并分别研究它们作为 D 和 D s 基态的手性伙伴的可能识别。我们展示了它们的质量和衰变宽度随温度的变化，并提供了对转变温度以下重口味部分的手性对称恢复的分析。特别地，我们分析了 D 介子的非常特殊的情况，