Journal Article

NNLO QCD predictions for Z-boson production in association with a charm jet within the LHCb fiducial region

Huss, A., Gauld, R., Glover, E. W. N., Rodriguez Garcia, A., Gehrmann–De Ridder, A., Stagnitto, G.

2023

Overview

We compute next-to-next-to-leading order (NNLO) QCD corrections to neutral vector boson production in association with a charm jet at the LHC. This process is studied in the forward kinematics at s = 13  TeV, which may provide valuable constraints on the intrinsic charm component of the proton. A comparison is performed between fixed order and NLO predictions matched to a parton shower showing mutual compatibility within the respective uncertainties. NNLO corrections typically lead to a reduction of theoretical uncertainties by a factor of two and the perturbative convergence is further improved through the introduction of a theory-inspired constraint on the transverse momentum of the vector boson plus jet system. A comparison between these predictions with data will require an alignment of a flavour-tagging procedure in theory and experiment that is infrared and collinear safe.

• Publisher: Springer Berlin Heidelberg,Springer,Springer Nature B.V,SpringerOpen
• Subject: Accuracy / Astronomy / Astrophysics and Cosmology / Collaboration / Elementary Particles / Flavor (particle physics) / Hadrons / Heavy Ions / Kinematics / Measurement Science and Instrumentation / Nuclear Energy / Nuclear Physics / Partons / Phenomenology / Physics / Physics and Astronomy / Quantum chromodynamics / Quantum Field Theories / Quantum Field Theory / Quarks / Regular - Theoretical Physics / Regular Article - Theoretical Physics / String Theory / Theoretical physics / Transverse momentum / Uncertainty