Amplitudes for left-handed strings

Amplitudes for left-handed strings
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DOI:
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发表时间:
2015-12
期刊:
arXiv: High Energy Physics - Theory
影响因子:
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通讯作者:
W. Siegel
W. Siegel
中科院分区:
其他
文献类型:
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作者:
W. Siegel

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我们考虑了一类前面介绍过的类弦模型,其中所有的模式都是左手的,所有的状态都是无质量的,T-对偶是明显的,并且只有有限数量的订单中的弦张力可以出现。这些理论是由标准弦理论通过奇异规范极限和世界面边界条件的相关变化而产生的。在本文中,我们展示了如何计算振幅使用规范参数作为红外调节器。振幅产生Cachazo-He-Yuan δ函数后,一些模积分;梅森-斯金纳弦样的行动和振幅产生的零张力(无限斜率)的限制。然而,如果没有这个极限,振幅就有与Mason-Skinner形式主义相同的问题。
We consider a class of string-like models introduced previously where all modes are left-handed, all states are massless, T-duality is manifest, and only a finite number of orders in the string tension can appear. These theories arise from standard string theories by a singular gauge limit and associated change in worldsheet boundary conditions. In this paper we show how to calculate amplitudes by using the gauge parameter as an infrared regulator. The amplitudes produce the Cachazo-He-Yuan delta-functions after some modular integration; the Mason-Skinner string-like action and amplitudes arise from the zero-tension (infinite-slope) limit. However, without the limit the amplitudes have the same problems as found in the Mason-Skinner formalism.