Prospects for strong coupling measurement at hadron colliders using soft-drop jet mass

Abstract

We compute the soft-drop jet-mass distribution from $pp$ collisions to NNLL accuracy while including nonperturbative corrections through a field-theory based formalism. Using these calculations, we assess the theoretical uncertainties on an ${\alpha }_s$ precision measurement due to higher order perturbative effects, nonperturbative corrections, and PDF uncertainty. We identify which soft-drop parameters are well-suited for measuring ${\alpha }_s$, and find that higher-logarithmic resummation has a qualitatively important effect on the shape of the jet-mass distribution. We find that quark jets and gluon jets have similar sensitivity to ${\alpha }_s$, and emphasize that experimentally distinguishing quark and gluon jets is not required for an ${\alpha }_s$ measurement. We conclude that measuring ${\alpha }_s$ to the 10% level is feasible now, and with improvements in theory a 5% level measurement is possible. Getting down to the 1% level to be competitive with other state-of-the-art measurements will be challenging.

53 pages + appendices, 15 figures

References in corpus (23)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FLAG Review 2021
• A precise determination of alpha_s from LEP thrust data using effective field theory
• Treating the b quark distribution function with reliable uncertainties
• Non-perturbative QCD effects in jets at hadron colliders
• C-parameter Distribution at N${}^3$LL${}^{\prime }$ including Power Corrections
• First determination of the strong coupling constant using NNLO predictions for hadronic event shapes in e^+e^- annihilations
• On jet mass distributions in Z+jet and dijet processes at the LHC
• Determination of the strong coupling constant using matched NNLO+NLLA predictions for hadronic event shapes in e+e- annihilations
• Non-Perturbative Contribution to the Thrust Distribution in $e^{+}{e}^{-}$ Annihilation
• Dynamical grooming of QCD jets
• Dissecting Soft Radiation with Factorization
• NNLO hard functions in massless QCD
• Dynamically groomed jet radius in heavy-ion collisions
• Why ${\alpha }_s$ Cannot be Determined from Hadronic Processes without Simultaneously Determining the Parton Distributions
• Calculating the primary Lund Jet Plane density
• Groomed jet mass at high precision
• Boosted Top Quarks in the Peak Region with N${}^3$LL Resummation
• The Jet Shape at NLL${}^{\prime }$
• Two- and Three-Loop Data for Groomed Jet Mass
• Leading jets and energy loss
• EFT for Soft Drop Double Differential Cross Section
• Jet energy drop

Cited by in corpus (3)

• Liouvillian Dynamics of the Open Schwinger Model: String Breaking and Kinetic Dissipation in a Thermal Medium
• The Catchment Area of Groomed Jets at NNLL
• Resummed jet mass distribution with trimming in Z+jet events at the LHC