Mesons at large Nc from lattice QCD

被引：21

作者：

Bali, Gunnar S. ^{[1
]}

Bursa, Francis ^{[2
]}

机构：

[1] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[2] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2008年 / 09期

关键词：

lattice QCD; AdS-CFT correspondence; 1/N expansion;

D O I：

10.1088/1126-6708/2008/09/110

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We calculate the pion and rho meson masses in quenched SU(N) gauge theories for N = 2, 3, 4 and 6. Extrapolating these results to the chiral and large-N limits, we find m(rho) = (1.670 +/- 0.024)root sigma for the rho meson mass at a fixed lattice spacing a approximate to 0.2093 sigma(-1/2) approximate to 0.093 fm, where we use the (arbitrary) value (444MeV)(2) for the string tension. We estimate a continuum limit large-N value, m(rho) = (1.77 +/- 0.05)root sigma. We find 1/N-2 corrections to be small and we compare our results to predictions from AdS/QCD.

引用

页数：18

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