2020/07/31 by Pedro Cal, Kyle Lee, Felix Ringer +1 · 12 citations
Physics and Astronomy · #Drop (telecommunication) #High-Energy Particle Collisions Research #Jet (fluid) #Large Hadron Collider #Monte Carlo method #Observable #Particle physics theoretical and experimental studies #Parton shower #Perturbative QCD #Quantum Chromodynamics and Particle Interactions #Resummation #hep-ph
paper · pdf · doi:10.1007/jhep11(2020)012
published in Journal of High Energy Physics 2020(11) (Springer Nature) · 49 pages, 25 figures, published version
openalex created_date 2020/07/29 · openalex publication_date 2020/11/01 · arxiv created 2022/02/14 · arxiv updated 2022/02/15 · openalex updated_date 2026/08/06
A bstract We study the jet energy drop, which is the relative difference between the groomed and ungroomed jet energy or transverse momentum. It is one of the fundamental quantities that characterizes the impact of grooming on jets produced in high energy collisions. We consider three different grooming algorithms i) soft drop, ii) iterated soft drop, and iii) trimming. We carry out the resummation of large logarithms of the jet energy drop, the jet radius as well as relevant grooming parameters at next-to-leading logarithmic (NLL′) accuracy. In addition, we account for non-global and clustering logarithms, and determine the next-to-leading order corrections. For soft drop we perform a joint resummation of the jet energy drop and the groomed jet radius, which is necessary to achieve the correct all-order structure of the cross section, in particular for the Sudakov-safe case of soft drop with β = 0. We present numerical results for LHC energies and compare to P ythia simulations as well as CMS data. Our factorization framework predicts the onset of nonperturbative effects in the jet energy distribution, in line with what we find in P ythia . The jet energy drop observables stand out because they only probe soft radiation, making them ideal candidates for the tuning of parton shower Monte Carlo event generators and for probing medium effects in heavy-ion collisions.