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arXiv 0810.5550hep-lat
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全QCD中的光介子双光子衰变

Light-Meson Two-Photon Decays in Full QCD

Saul D. Cohen, Huey-Wen Lin, Jozef Dudek, Robert G. Edwards

摘要:

本文研究了轻介子的双光子衰变,重点研究了中性π介子衰变。这个重要的过程突出了QCD中轴向反常的影响,但在晶格上的研究却很少。应用Lehmann-Symanzik-Zimmermann(LSZ)约化公式,从2+1味各向同性三叶草晶格上计算的三点矢量-矢量格林函数重构电磁矩阵元.

英文摘要:

We present a study of two-photon decays of light mesons, focusing on the neutral pion decay. This important process highlights the effects of the axial anomaly in QCD but has been little studied on the lattice. By applying the Lehmann-Symanzik-Zimmermann (LSZ) reduction formula, we reconstruct the electromagnetic matrix elements from three-point vector-vector Green functions calculated on 2+1-flavor isotropic clover lattices.

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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