Exclusive Heavy Quark Dijet Cross Section

We study the exclusive heavy quark dijet cross section from e⁺e⁻ annihilation by using soft-collinear effective theory. In order to resum the large logarithms of the small jet veto parameter β and the jet radius R, we factorize the cross section into hard, hard-soft, collinear, and collinear-soft parts. Compared with the case of a massless quark, the jet sector with the collinear and the collinear-soft parts can be modified to include the heavy quark mass. The factorization of the jet sector can be systematically achieved through matching onto the boosted heavy quark effective theory. Heavy quark mass corrections enhance the cross section sizably and cannot be ignored when the quark mass is comparable to the jet size E_JR. We also analyze the exclusive heavy quark pair production in the limit as R goes to zero. Using the resummed result, we estimated the top isolation effects on the cross section.