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arXiv 1305.6322hep-th
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M-Strings

M-Strings

Babak Haghighat, Amer Iqbal, Can Kozcaz, Guglielmo Lockhart, Cumrun Vafa

摘要:

悬挂在相邻的平行的M5膜之间的M2膜导致了轻弦,即“M弦”。在本文中,我们计算椭圆亏格的M-弦,扭曲的最大允许对称,保持2d(2,0)超对称。在余维一个子空间的参数,这减少到椭圆亏格的(4,4)超对称A_{n-1}理论在2d。我们将N个M弦的椭圆亏格与R^4的N重对称积上的(4,4)西格玛模型进行了对比。对于N=1,它们是相同的,但是对于N>1,它们是接近的,但是不相同。相反,(4,4)N M弦的椭圆亏格与R^4的N重对称积上的(4,0)西格玛模型的椭圆亏格相同,但右移费米子耦合到切丛的修改。这个结构来自于U(1)规范群的对偶A_{n-1}-6d规范理论。此外,我们还计算了域壁的椭圆亏格,这些域壁将不同数目的M2膜分隔在壁的两侧。

英文摘要:

M2 branes suspended between adjacent parallel M5 branes lead to light strings, the `M-strings'. In this paper we compute the elliptic genus of M-strings, twisted by maximally allowed symmetries that preserve 2d (2,0) supersymmetry. In a codimension one subspace of parameters this reduces to the elliptic genus of the (4,4) supersymmetric A_{n-1} quiver theory in 2d. We contrast the elliptic genus of N M-strings with the (4,4) sigma model on the N-fold symmetric product of R^4. For N=1 they are the same, but for N>1 they are close, but not identical. Instead the elliptic genus of (4,4) N M-strings is the same as the elliptic genus of (4,0) sigma models on the N-fold symmetric product of R^4, but where the right-moving fermions couple to a modification of the tangent bundle. This construction arises from a dual A_{n-1} quiver 6d gauge theory with U(1) gauge groups. Moreover we compute the elliptic genus of domain walls which separate different numbers of M2 branes on the two sides of the wall.

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