Consistency of operator product expansions of Boundary 2d CFT and Swiss-cheese operad

Abstract: In this paper, we construct an action of the fundamental groupoid of the Swiss-cheese operad (the parenthesized permutation and braid operad) on $C_1$-cofinite module categories of a vertex operator algebra. Based on this result, we show that when a boundary conformal field theory has locally $C_1$-cofinite chiral symmetry, all operator product expansions converge absolutely on open regions in the configuration spaces of the upper half-plane and define real analytic functions (the correlation functions), independent of orders and parentheses of OPEs.