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Monte Carlo study of glueball masses in the Hamiltonian limit of SU(3) lattice gauge theory

机译:蒙特卡罗研究sU(3)哈密顿量极限中的胶球质量   格点规范理论

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摘要

Using Standard Euclidean Monte Carlo techniques, we discuss in detail theextraction of the glueball masses of 4-dimensional SU(3) lattice gauge theoryin the Hamiltonian limit, where the temporal lattice spacing is zero. By takinginto account the renormalization of both the anisotropy and the Euclideancoupling, we calculate the string tension and masses of the scalar, axialvector and tensor states using standard Wilson action on increasinglyanisotropic lattices, and make an extrapolation to the Hamiltonian limit. Theresults are compared with estimates from various other Hamiltonian andEuclidean studies. We find that more accurate determination of the glueballmasses and the mass ratios has been achieved and the results are a significantimprovement upon previous Hamiltonian estimates. The continuum predictions arethen found by extrapolation of results obtained from smallest values of spatiallattice spacing. For the lightest scalar, tensor and axial vector states weobtain masses of $m_{0^{++}}=1654 \pm 83$ MeV, $m_{2^{++}}=2272\pm 115$ MeV and$m_{1^{+-}}=2940\pm 165$ MeV, respectively. These are consistent with theestimates obtained in the previous studies in the Euclidean limit. Theconsistency is a clear evidence of universality between Euclidean andHamiltonian formulations. From the accuracy of our estimates, we conclude thatthe standard Euclidean Monte Carlo method is a reliable technique for obtainingresults in the Hamiltonian version of the theory, just as in Euclidean case.
机译:使用标准的欧几里得蒙特卡罗技术,我们详细讨论了在时域晶格间距为零的哈密顿极限中的4维SU(3)晶格规理论胶球质量的提取。通过考虑各向异性和欧几里得耦合的重新归一化,我们使用对越来越各向异性的晶格的标准威尔逊作用,计算了标量,轴向矢量和张量态的弦张力和质量,并对汉密尔顿极限进行了外推。将结果与其他各种汉密尔顿和欧几里得研究的估计值进行比较。我们发现胶球质量和质量比的更精确测定已经实现,并且该结果是对先前哈密顿量估计的重大改进。然后通过外推从最小空间格间距值获得的结果来找到连续体预测。对于最轻的标量,张量和轴向矢量状态,我们获得质量$ m_ {0 ^ {++}} = 1654 \ pm 83 $ MeV,$ m_ {2 ^ {++}} = 2272 \ pm 115 $ MeV和$ m_ {1 ^ {+-}} = 2940 \ pm 165 $ MeV。这些与先前研究中在欧几里得极限中获得的估计一致。一致性清楚地证明了欧几里得和哈密顿公式之间的通用性。从估计的准确性出发,我们得出结论,就像欧几里德案例一样,标准的欧几里得蒙特卡罗方法是获得该理论的哈密顿版本结果的可靠技术。

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