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arXiv 1109.6764hep-th
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共形块体的大中心荷极限

The large central charge limit of conformal blocks

Vladimir Fateev, Sylvain Ribault

摘要:

研究了在中心荷较大的极限下具有W3对称代数的共形场论的共形块。在这个极限中,我们将四点块计算为sl 3不变函数的特殊情况。在这种情况下,当两个四个字段是半退化的,我们检查,我们的结果同意块的组合扩展作为一个总和超过杨图。我们还证明了这样的块服从一个六阶微分方程,并且除了在z= 0,1,infinity处的奇异性外,在z=-1处还有一个意想不到的奇异性.

英文摘要:

We study conformal blocks of conformal field theories with a W3 symmetry algebra in the limit where the central charge is large. In this limit, we compute the four-point block as a special case of an sl3-invariant function. In the case when two of the four fields are semi-degenerate, we check that our results agree with the block's combinatorial expansion as a sum over Young diagrams. We also show that such a block obeys a sixth-order differential equation, and that it has an unexpected singularity at z=-1, in addition to the expected singularities at z=0,1,infinity.

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