Calculating the angle between jet axes

Understand

We study the angle between i) the standard jet axis, ii) the axis of a jet which has been groomed using soft drop, with reduced sensitivity to soft radiation, iii) the jet axis obtained with the winner-take-all recombination scheme, which is insensitive to soft radiation at leading power.

• We calculate the distributions for these angles at next-to-leading logarithmic accuracy, including non-global logarithms.
• The angle between the standard and groomed jet axis directly probes soft wide-angle radiation, leading to a novel factorization formula.
• This angle is also very sensitive to nonperturbative physics, which is directly connected to nonperturbative contribution to the rapidity anomalous dimension for transverse momentum distributions.