Variable Flavor Number Scheme for Final State Jets in Thrust

Understand

We present results for mass effects coming from secondary radiation of heavy quark pairs related to gluon splitting in the thrust distribution for e+e- collisions.

• The results are given in the dijet limit where the hard interaction scale and the scales related to collinear and soft radiation are widely separated.
• We account for the corresponding fixed-order corrections at O(alpha_s^2) and the summation of all logarithmic terms related to the hard, collinear and soft scales as well as the quark mass at N3LL order.
• We also remove the O(Lambda_QCD) renormalon in the partonic soft function leading to an infrared evolution equation with a matching condition related to the massive quark threshold.