Multi-jet merging with TMD parton branching

A bstract One of the main theoretical systematic uncertainties in studies of final states with large jet multiplicities at high-energy hadron colliders is associated with the merging of QCD parton showers and hard-scattering matrix elements. We present a method to incorporate the physics of transver...

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Bibliographic Details
Published inThe journal of high energy physics Vol. 2022; no. 9; pp. 60 - 44
Main Authors Bermudez Martinez, A., Hautmann, F., Mangano, M. L.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 07.09.2022
Springer Nature B.V
SpringerOpen
Subjects
Algorithms
Approximation
Classical and Quantum Gravitation
Elementary Particles
High energy physics
Jets and Jet Substructure
Parton Shower
Partons
Physics
Physics and Astronomy
Quantum chromodynamics
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
String Theory
Transverse momentum
Parton Shower
Jets and Jet Substructure
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Summary:A bstract One of the main theoretical systematic uncertainties in studies of final states with large jet multiplicities at high-energy hadron colliders is associated with the merging of QCD parton showers and hard-scattering matrix elements. We present a method to incorporate the physics of transverse momentum recoils due to initial-state shower evolution into multi-jet merging algorithms by using the concept of transverse momentum dependent (TMD) distributions and the associated parton branching. We investigate the dependence on the merging scale and illustrate the impact of the new method at the level of both exclusive and inclusive final-state observables by studying differential jet rates, transverse momentum spectra and multiplicity distributions, using vector boson + jets events at the LHC as a case study.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP09(2022)060