Enhancing di-jet resonance searches via a final-state radiation jet tagging algorithm

Abstract

In this article, we investigate the possibility of enhancing the di-jet resonance searches by tagging the final state radiation (FSR) jet, using an event-level deep neural network. It is found that solely relying on the 4-momenta of the leading three jets allows the algorithm to achieve good discriminating power that can identify the hardest FSR jet in signal, while rejecting other soft jets. Once the invariant mass is corrected with the tagged FSR jet, the mass resolution of the signal is greatly enhanced, and the sensitivity of the search is also improved by more than 10%. By crafting the input variables carefully, the algorithm introduces minimal mass sculpting for the background, and its applicability extends to a broad mass range. This work proves that FSR jet tagging can potentially enhance the di-jet resonance searches, suiting various stages of the physics programmes at the Large Hadron Collider (LHC) and High-Luminosity LHC (HL-LHC).

arXiv commentTo be published in Chinese Physics C

References in corpus (37)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• The Catchment Area of Jets
• QCD radiation in the production of heavy colored particles at the LHC
• Search for new particles decaying into dijets in proton-antiproton collisions at sqrt(s) = 1.96 TeV
• TeV Strings and Collider Probes of Large Extra Dimensions
• Emerging Jets
• Dark Matter Searches at Colliders
• Search for new resonances in mass distributions of jet pairs using 139 fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Semi-visible Jets: Dark Matter Undercover at the LHC
• Search for high mass dijet resonances with a new background prediction method in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurement of dijet angular distributions at sqrt{s}=1.96TeV and searches for quark compositeness and extra spatial dimensions
• Searches for Dijet Resonances at Hadron Colliders
• Inelastic Black Hole Production and Large Extra Dimensions
• Dark matter production through loop-induced processes at the LHC: the s-channel mediator case
• Identification and rejection of pile-up jets at high pseudorapidity with the ATLAS detector
• Search for resonant production of strongly coupled dark matter in proton-proton collisions at 13 TeV
• Exploration at the high-energy frontier: ATLAS Run~2 searches investigating the exotic jungle beyond the Standard Model
• Effects of QCD radiation on inclusive variables for determining the scale of new physics at hadron colliders
• Controlling ISR in sparticle mass reconstruction
• Enriching the physics program of the CMS experiment via data scouting and data parking
• Model-agnostic search for dijet resonances with anomalous jet substructure in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Exploiting jet binning to identify the initial state of high-mass resonances
• Probing the Gauge Content of Heavy Resonances with Soft Radiation
• Colour connection structure of (supersymmetric) QCD ($2\to 2$) processes
• Search for dijet resonances using events with three jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Signal-background interference for a singlet spin-0 digluon resonance at the LHC
• Interference Effect on Resonance Studies in Searches of Heavy Particles
• SymbolFit: Automatic Parametric Modeling with Symbolic Regression
• Search for low-mass resonances decaying into two jets and produced in association with a photon or a jet at $\sqrt{s}=13$ TeV with the ATLAS detector
• Gaussian Process Regression as a Sustainable Data-driven Background Estimate Method at the (HL)-LHC
• Signal-background interference for digluon resonances at the Large Hadron Collider
• Search for electroweak-scale dijet resonances using trigger-level analysis with the ATLAS detector in $132$ fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}=13$ TeV
• Semi-visible jets + X: Illuminating Dark Showers with Radiation
• Performance and calibration of quark/gluon-jet taggers using 140 fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector