A note on the Virasoro blocks at order $1/c$

Abstract

We derive an explicit expression for the $1/c$ contribution to the Virasoro blocks in 2D CFT in the limit of large $c$ with fixed values of the operators' dimensions. We follow the direct approach of orthonormalising, at order $1/c$, the space of the Virasoro descendants to obtain the blocks as a series expansion around $z=0$. For generic conformal weights this expansion can be summed in terms of hypergeometric functions and their first derivatives with respect to one parameter. For integer conformal weights we provide an equivalent expression written in terms of a finite sum of undifferentiated hypergeometric functions. These results make the monodromies of the blocks around $z=1$ manifest.

13 pages; v2: added references to previous work

References in corpus (4)

• Holography from Conformal Field Theory
• Conformal blocks from Wilson lines with loop corrections
• Correlators in higher spin AdS_3 holography from Wilson lines with loop corrections
• Anomalous dimensions from quantum Wilson lines

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