Jan 23 – 27, 2023
Bormio, Italy
Europe/Berlin timezone

Toward an effective field theory for LHC jets

Jan 25, 2023, 12:10 PM
Bormio, Italy

Bormio, Italy

Extended Contribution Wednesday Morning


Matthias Neubert (Johannes Gutenberg University Mainz)


Jet cross sections at high-energy colliders exhibit intricate patterns of logarithmically enhanced higher-order corrections. In particular, so-called non-global logarithms emerge from soft radiation emitted off energetic partons inside jets. While this is a single-logarithmic effect at lepton colliders, at hadron colliders phase factors in the amplitudes lead to double-logarithmic corrections starting at four-loop order. This effect was discovered a long time ago, but not much is known about the higher-order behavior of these terms and their process dependence. We derive, for the first time, the all-order structure of these ``super-leading logarithms'' for generic $2\to n$ scattering processes at hadron colliders and resum them in closed form. We show that due to a strong numerical enhancement these effects can be numerically of the same order as a typical one-loop correction, and their inclusion is important for many precision calculations of LHC cross sections.

Topic Particle Physics

Primary author

Matthias Neubert (Johannes Gutenberg University Mainz)

Presentation materials