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arXiv 1506.08802hep-thgr-qchep-phmath-phmath.MP
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关于RR耦合、奇异结构和$α'$与BPS弦振幅的所有阶接触相互作用

On RR Couplings, Singularity Structures and all order $α'$ contact interactions to BPS String Amplitudes

Ehsan Hatefi

摘要:

在弦Ramond-Ramond顶点算符存在的情况下,我们计算了一个横向标量场、两个世界体积规范场(以及两个横向标量和一个规范场)的五点弦论振幅.详细计算了五点混合RR标量场/规范场$<C^{-1}ϕ^{0}A^{-1} A^{0}>$、$<C^{-1}ϕ^{-1}A^{0} A^{0}>$、$<C^{-1}A^{0}ϕ^{-1}ϕ^{0}>$和$<C^{-1}A^{-1}ϕ^{0}ϕ^{0}>$的全部S矩阵元,并开始比较横向和世界体积方向上的所有阶$α'$接触相互作用和奇异性。我们探讨了弦论有效作用量中各种新耦合的存在,并找出了它们在IIA型和IIB型中的所有阶$α'$高阶导数修正。最后,我们作出各种评论的奇异性和接触项的RR动量嵌入在横向方向。$α'$纠正一些迈尔斯条款也解决了。

英文摘要:

We evaluate five point world-sheet string theory amplitudes of one transverse scalar field, two world volume gauge fields ( and two transverse scalars, a gauge field) in the presence of a closed string Ramond-Ramond vertex operator in its symmetric picture. We carry out all the entire S-matrix elements of five point mixed RR-scalars/gauge fields $<C^{-1}ϕ^{0}A^{-1} A^{0}>$, $<C^{-1}ϕ^{-1}A^{0} A^{0}>$, $<C^{-1}A^{0}ϕ^{-1}ϕ^{0}>$ and $<C^{-1}A^{-1}ϕ^{0}ϕ^{0}>$ in detail and start comparing all order $α'$ contact interactions and singularities in both transverse and world volume directions. We explore the presence of various new couplings in string theory effective actions and find out their all order $α'$ higher derivative corrections in both type IIA and IIB. Ultimately we make various remarks for the singularities and contact terms whose RR momenta are embedded in transverse directions. $α'$ corrections to some of Myers terms are also addressed.

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