Uncharted Logarithmic Structures in QCD Transverse-Energy Flow.

Authors

Mrinal Dasgupta, Alexander Fraley, Pier Francesco Monni, Saad Nabeebaccus

Published in

Physical review letters. Volume 137. Issue 11. Pages 111906. Sep 11, 2026.

Abstract

We investigate the QCD transverse-energy (E_{T}) flow distribution within an azimuthal region of phase space, defined by an angular interval Δϕ on the plane transverse to a chosen reference axis. Vetoes on the resulting E_{T} are widely employed at the LHC to isolate missing transverse momentum in final states with invisible particles. We show that this observable has logarithmic structures never seen before in QCD calculations. Notably, its description involves the resummation of nonglobal and coherence-violating logarithmic contributions that are more singular than any reported to date. We analyze its all-orders behavior, providing analytical resummation for pp collisions at next-to-double-logarithmic accuracy and numerical resummation at leading-logarithmic accuracy in the Veneziano limit. We further present a computation of the leading coherence-violating correction, highlighting its novel structure. The intricate structure of vetoes in azimuthal gaps reveals new aspects of QCD dynamics and offers a novel probe of coherence-violating logarithmic terms in LHC observables.

PMID:
42789878
Bibliographic data and abstract were imported from PubMed on 26 Sep 2026.

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