Speaker
Description
We compute the soft-drop jet-mass distribution from pp collisions to NNLL accuracy while including nonperturbative corrections through a field-theory based formalism. Using these calculations, we assess the theoretical uncertainties on an $\alpha_s$ precision measurement due to higher-order perturbative effects, nonperturbative corrections, and PDF uncertainty. We identify which soft-drop parameters are well-suited for measuring $\alpha_s$, and find that higher-logarithmic resummation has a qualitatively important effect on the shape of the jet mass distribution. We find that gluon jets are more sensitive to $\alpha_s$ than quark jets, and show that experimentally distinguishing quark and gluon jets is not required for this $\alpha_s$ measurement. We conclude that measuring $\alpha_s$ to the 10% level is feasible but getting down to the 1% level to be competitive with other state-of-the-art measurements will be challenging.
