Eta入门：用AdS/QCD求解U（1）问题
An Eta Primer: Solving the U(1) Problem with AdS/QCD
摘要：
受AdS/CFT对应的启发，我们研究了强弯曲额外维时空中QCD的赝标介子。由于五维和QCD的算子乘积展开的限制，该模型包含了对称性的结果，并且只有很少的自由参数。作为输入的π介子，K介子，和ρ质量和fpi，我们计算的eta和eta素数质量分别为520和867兆电子伏。它们的衰变率为光子也计算和发现是在良好的协议与数据。
英文摘要：
Inspired by the AdS/CFT correspondence, we study the pseudoscalar mesons of QCD through a dual embedding in a strongly curved extra dimensional spacetime. This model incorporates the consequences of symmetry and has very few free parameters, due to constraints from five-dimensions and the operator product expansion of QCD. Using as inputs the pion, kaon, and rho masses and fpi, we compute the eta and eta prime masses to be 520 and 867 MeV, respectively. Their decay rates into photons are also computed and found to be in good agreement with data.
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