Rebalance and Smear for Multi-jet Background Estimation
arXiv:2206.09583 · doi:10.1088/1748-0221/17/09/P09022
Abstract
For many particle collider searches for physics beyond the Standard Model in final states with jets and missing transverse momentum, events from QCD multi-jet processes are an important and challenging background contribution. The CMS and ATLAS experiments have previously developed data-driven methods designed to succeed where Monte Carlo methods suffer large theoretical and experimental uncertainties. One such method is Rebalance and Smear (R&S), which predicts QCD backgrounds by applying a series of folding and unfolding techniques to data control regions. A top-to-bottom description of the R&S method is presented, along with a discussion of its applicability and limitations. A software application is provided that performs the R\&S method using public, non-proprietary tools, interfacing with data sets produced by Delphes3. In general, the method is suitable for predicting multi-jet backgrounds in searches for stable non-detectable particles, such as dark matter candidates. A case study is carried out in simulated events of proton-proton collisions at 14 TeV in the context of a potential search for Higgsino dark matter produced in the decay products of supersymmetric quark partners. Sources of potential bias are explored and prescriptions for evaluating systematic uncertainties are suggested.
arXiv comment19 pages, 5 figures, 1 table, prepared for submission to JINST
References in corpus (26)
- A Brief Introduction to PYTHIA 8.1
- FastJet user manual
- DELPHES 3, A modular framework for fast simulation of a generic collider experiment
- A direct empirical proof of the existence of dark matter
- A Supersymmetry Primer
- Dark Matter Search Results from a One TonneYear Exposure of XENON1T
- Results from a search for dark matter in the complete LUX exposure
- Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
- TMVA - Toolkit for Multivariate Data Analysis
- Study of Constrained Minimal Supersymmetry
- Simplified Models for LHC New Physics Searches
- Low-Mass Dark Matter Search with the DarkSide-50 Experiment
- Simplified Models for a First Characterization of New Physics at the LHC
- Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using 4.7 fb^-1 of sqrt(s) = 7 TeV proton-proton collision data
- Dark Matter Searches at Colliders
- Search for supersymmetry in proton-proton collisions at 13 TeV in final states with jets and missing transverse momentum
- Searching for Directly Decaying Gluinos at the Tevatron
- Search for squarks and gluinos in events with jets and missing transverse energy using 2.1 fb-1 of ppbar collision data at sqrt(s)=1.96 TeV
- Search for squarks and gluinos in final states with jets and missing transverse momentum using 139 fb of =13 TeV collision data with the ATLAS detector
- Search for new phenomena with the MT2 variable in the all-hadronic final state produced in proton-proton collisions at sqrt(s) = 13 TeV
- Search for new phenomena in final states with large jet multiplicities and missing transverse momentum using sqrt(s)=7 TeV pp collisions with the ATLAS detector
- Search for New Physics with Jets and Missing Transverse Momentum in pp collisions at sqrt(s) = 7 TeV
- Search for Gluinos and Scalar Quarks in Collisions at TeV using the Missing Energy plus Multijets Signature
- Search for invisible Higgs-boson decays in events with vector-boson fusion signatures using 139 of proton-proton data recorded by the ATLAS experiment
- Higgsino Dark Matter in the MSSM
- Search for supersymmetry in the all-hadronic final state using top quark tagging in pp collisions at sqrt(s) = 13 TeV