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arXiv 1407.7883hep-th
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AdS(n)× S(n)× T(10- 2 n)超弦的单圈世界表S-矩阵

The one-loop worldsheet S-matrix for the AdS(n) x S(n) x T(10-2n) superstring

Radu Roiban, Per Sundin, Arkady Tseytlin, Linus Wulff

摘要:

我们计算了AdS(n)x S(n)x T(10-2n)(n= 2,3,5)超弦理论在逆弦张力下的近BMN展开到单圈阶的双扇区世界面S-矩阵.我们证明了,在考虑波函数重整化后,单圈S-矩阵是UV有限的。在适当的正则化方案中,S矩阵与超弦理论的基本对称性是一致的,即对于n= 3,5的情况,它与光锥规范对称性所暗示的对称性一致,其中修饰相位由交叉方程确定。对于n= 2,3的情况,我们观察到无质量模与有质量模散射的单圈计算解耦,即2n维超陪集西格玛模型和全10维超弦恰好具有相同的有质量单圈S矩阵.

英文摘要:

We compute the massive-sector worldsheet S-matrix for superstring theories in AdS(n) x S(n) x T(10-2n) (with n=2,3,5) in the near BMN expansion up to one-loop order in inverse string tension. We show that, after taking into account the wave function renormalization, the one-loop S-matrix is UV finite. In an appropriate regularization scheme the S-matrix is consistent with the underlying symmetries of the superstring theory, i.e. for the n=3,5 cases it coincides with the one implied by the light-cone gauge symmetries with the dressing phases determined from the crossing equations. For the n=2,3 cases we observe that the massless modes decouple from the one-loop calculation of massive mode scattering, i.e. the 2n-dimensional supercoset sigma model and the full 10-dimensional superstring happen to have the same massive one-loop S-matrix.

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