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arXiv 2007.12601hep-phnucl-th
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有限温度下的赝标和矢量开粲介子

Pseudoscalar and vector open-charm mesons at finite temperature

Glòria Montaña, Àngels Ramos, Laura Tolos, Juan M. Torres-Rincon

摘要:

采用包含重夸克自旋对称性的手征有效场论,用自洽多体方法分析了赝标和矢量粲介子的真空和热性质.在全耦合道基下,通过对粲介子与轻介子散射的真空相互作用振幅进行么正化,寻找了新的动态产生态。的时间的形式主义扩展到有限的温度计算高达$T=150$兆电子伏。提供了$D$、$D^*$、$D_s$和$D_s^*$介子的介质修正谱形。本文还报道了在复能平面上均呈双极结构的非奇异$D_0^*$(2300)和$D_1^*$(2430)介子的质量和衰变宽度与温度的关系,以及$D_{s0}^*$(2317)和$D_{s1}^*$(2460)共振态和其它实验上尚未确定的态的质量和衰变宽度与温度的关系。作为第一个计算纳入开放的魅力矢量介子在有限温度下的自洽的方式,它带来了机会,讨论的手征和重夸克自旋对称性的角度下的开放的魅力部门的介质效应。

英文摘要:

Vacuum and thermal properties of pseudoscalar and vector charm mesons are analyzed within a self-consistent many-body approach, employing a chiral effective field theory that incorporates heavy-quark spin symmetry. Upon unitarization of the vacuum interaction amplitudes for the scattering of charm mesons off light mesons in a fully coupled-channel basis, new dynamically generated states are searched. The imaginary-time formalism is employed to extend the calculation to finite temperatures up to $T=150$ MeV. Medium-modified spectral shapes of the $D$, $D^*$, $D_s$ and $D_s^*$ mesons are provided. The temperature dependence of the masses and decay widths of the nonstrange $D_0^*$ (2300) and $D_1^*$(2430) mesons, both showing a double-pole structure in the complex-energy plane, is also reported, as well as that of the $D_{s0}^*$(2317) and $D_{s1}^*$(2460) resonances and other states not yet identified experimentally. Being the first calculation incorporating open-charm vector mesons at finite temperature in a self-consistent fashion, it brings up the opportunity to discuss the medium effects on the open charm sector under the perspective of chiral and heavy-quark spin symmetries.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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