Lattice study of ccu¯s¯ tetraquark channels in D()Ds() scattering

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-09-26 DOI:10.1103/tdjf-4l5v

Tanishk Shrimal, Sara Collins, Priyajit Jana, M. Padmanath, Sasa Prelovsek

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引用次数: 0

Abstract

We present the first lattice quantum chromodynamics (QCD) determination of coupled DDs* and D*Ds scattering amplitudes in the JP=1+ channel and elastic DDs scattering amplitude in the JP=0+ channel. The aim is to investigate whether tetraquarks with flavor ccu¯s¯ exist in the region near threshold. Lattice QCD ensembles from the CLS consortium with mπ∼280 MeV, a∼0.09 fm and L/a=24, 32 are utilized. Finite-volume spectra are determined via variational analysis of two-point correlation matrices, computed using large bases of operators resembling bilocal two-meson structures within the framework. The scattering matrix for partial wave l=0 is determined using lattice eigenenergies from multiple inertial frames following Lüscher’s formalism as well as following the solutions of Lippmann-Schwinger equation in the finite-volume on a plane-wave basis. We observe small nonzero energy shifts in the simulated spectra from the noninteracting scenario in both the channels studied, which points to rather weak nontrivial interactions between the mesons involved. Despite the nonzero energy shifts, the lattice-extracted S-wave amplitudes do not carry signatures of any hadron pole features in the physical amplitudes in the energy region near the threshold.

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D(*)Ds（*）散射中ccu¯s¯四夸克通道的点阵研究

本文首次用点阵量子色动力学（QCD）测定了耦合DDs*和D*Ds在JP=1+通道中的散射振幅和弹性DDs在JP=0+通道中的散射振幅。目的是研究在阈值附近区域是否存在有味道的四夸克。利用来自CLS联盟的点阵QCD系综，波长为mπ ~ 280 MeV，波长为~ 0.09 fm, L/a= 24,32。有限体积光谱是通过两点相关矩阵的变分分析确定的，使用类似于框架内双局部双介子结构的大型算子基来计算。利用多个惯性系的晶格本征能和有限体积内的李普曼-施温格方程在平面波基上的解，遵循l scher的形式确定了局部波l=0的散射矩阵。在两个通道中，我们观察到模拟光谱中的非零能量漂移，这表明所涉及的介子之间存在相当弱的非平凡相互作用。尽管存在非零能量位移，但晶格提取的s波振幅在阈值附近的能量区域的物理振幅中不携带任何强子极特征的特征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.