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arXiv 2603.01583hep-lathep-phhep-th
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介子谱和低能常数在大-N QCD中

Meson spectrum and low-energy constants in large-$N$ QCD

University of Bern(伯尔尼大学);Hiroshima University(广岛大学)

Claudio Bonanno, Margarita García Pérez, Antonio González-Arroyo, Ken-Ichi Ishikawa, Masanori Okawa

AI总结:

该研究通过格点蒙特卡洛模拟,在大-N极限下计算QCD的介子谱和低能常数,揭示了介子质量谱、径向Regge轨迹及低能耦合系数的非微扰结果。

摘要:

我们呈现了关于QCD在't Hooft大-N极限下的介子谱和低能常数的非微扰结果,该极限为N趋于无穷大,同时N_f/N趋于零。这些结果来自于Twisted Eguchi-Kawai(TEK)模型的格点蒙特卡洛模拟,直至N=841。更精确地说,我们将讨论:我们对介子质量谱的发现;在π和ρ通道中径向Regge轨迹的确定;以及通过TEK和标准有限-N结果的结合,计算楚尔凝聚子的系数、介子衰变常数以及次领头阶耦合$\bar{\ell}_4$的系数,直至$\mathcal{O}(1/N^3)$。

英文摘要:

We present new non-perturbative results about the meson spectrum and the low-energy constants of QCD in the 't Hooft large-$N$ limit, $N\to\infty$ with $N_{\scriptscriptstyle{\rm f}}/N\to 0$. These are obtained from lattice Monte Carlo simulations of the Twisted Eguchi-Kawai (TEK) model up to $N=841$. More precisely, we will discuss: our findings for the meson mass spectrum; the determination of the radial Regge trajectories in the $π$ and $ρ$ channels; the computation of the coefficients of the $1/N$ expansion of the chiral condensate, of the pion decay constant, and of the next-to-leading-order coupling $\bar{\ell}_4$, up to $\mathcal{O}(1/N^3)$ from the combination of TEK and standard finite-$N$ results.

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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