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arXiv 1005.0655hep-thhep-ph
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QCD全息对偶中的介子开弦

Mesons as Open Strings in a Holographic Dual of QCD

Toshiya Imoto, Tadakatsu Sakai, Shigeki Sugimoto

摘要:

本文研究了在IIA型弦论的D4/D8-膜组态上构造的QCD全息对偶中由大质量开弦模得到的介子谱。光谱包括自旋大于1的介子。考虑弯曲背景的微扰效应,我们得到了这些介子的质量公式,该公式在首阶具有线性Regge行为,并伴随次首阶非线性修正.我们认为,弦谱捕捉到的介子谱观察到的一些功能。例如,a_2(1320)、b_1(1235)、π(1300)、a_0(1450)等,被确定为第一激发质量开弦态和ρ_3(1690),π_2(1670)等,被识别为第二激发态。

英文摘要:

We study meson spectrum obtained from massive open string modes in a holographic dual of QCD constructed on the basis of a D4/D8-brane configuration in type IIA string theory. The spectrum includes mesons with spin higher than one. Taking into account the effect of curved background perturbatively, we obtain a mass formula for these mesons, which exhibits the linear Regge behavior at the leading order with subleading non-linear corrections. We argue that the string spectrum captures some features of the observed meson spectrum. For example, a_2(1320), b_1(1235), π(1300), a_0(1450), etc., are identified as the first excited massive open string states and ρ_3(1690), π_2(1670), etc., are identified as the second excited states.

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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