Measuring the polarization of boosted, hadronic bosons with jet substructure observables
arXiv:2008.04318
Abstract
In this work, we present a new technique to measure the longitudinal and transverse polarization fractions of hadronic decays of boosted bosons. We introduce a new jet substructure observable denoted as , which is a proxy constructed purely out of subjet energies for the parton level decay polar angle of the boson in its rest-frame. The distribution of this observable is sensitive to the polarization of bosons and can therefore be used to reconstruct the polarization in a way that is independent of the production process -- assuming Standard Model (SM) rules governing decays. We argue that this proxy variable has lower reconstruction errors as compared to the other proxies that have been used by the experimental collaborations, especially for large boosts of the -boson. As a test case, we study the efficacy of our technique on vector boson scattering (VBS) processes at the high luminosity Large Hadron Collider. We find that with only SM production channels, measuring the longitudinal polarization fraction is likely to be challenging even with 10 ab of data. We suggest further strategies and scenarios that may improve the prospects of measurement of the hadronic polarization fraction.
arXiv comment41 pages, 13 figures. Response to referee comments incorporated
References in corpus (31)
- Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
- Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
- The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
- A Brief Introduction to PYTHIA 8.1
- A Supersymmetry Primer
- Successive Combination Jet Algorithm For Hadron Collisions
- Better Jet Clustering Algorithms
- FeynRules - Feynman rules made easy
- Jet substructure as a new Higgs search channel at the LHC
- Identifying Boosted Objects with N-subjettiness
- Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
- Combined measurements of Higgs boson production and decay using up to fb of proton-proton collision data at 13 TeV collected with the ATLAS experiment
- Combined measurements of Higgs boson couplings in proton-proton collisions at 13 TeV
- Jet substructure as a new Higgs search channel at the LHC
- Observation of Higgs boson decay to bottom quarks
- Techniques for improved heavy particle searches with jet substructure
- Naturalness and the Status of Supersymmetry
- Physics searches at the LHC
- A modified naturalness principle and its experimental tests
- Measurement of the W boson polarization in top quark decays with the ATLAS detector
- W and Z Polarization Effects in Hadronic Collisions
- Electroweak gauge boson polarisation at the LHC
- High-Energy Vector Boson Scattering after the Higgs Discovery
- Measurement of the Polarization of W Bosons with Large Transverse Momenta in W+Jets Events at the LHC
- New Physics Signals in Longitudinal Gauge Boson Scattering at the LHC
- Criteria for Natural Hierarchies
- Measuring spin and CP from semi-hadronic ZZ decays using jet substructure
- Discriminating spin through quantum interference
- Polarized vector boson scattering in the fully leptonic WZ and ZZ channels at the LHC
- Resonances at the LHC beyond the Higgs: The Scalar/Tensor Case
- Quantum Interference Effects Among Helicities at LEP-II and Tevatron
Cited by in corpus (7)
- Vector Boson Scattering Processes: Status and Prospects
- Measurement of Higgs boson self-couplings through vector bosons scattering in future muon colliders
- Measuring Higgs Boson Self-couplings with VBS Processes
- Electroweak Restoration at the LHC and Beyond: The Channel
- Detecting anomaly in vector boson scattering
- A polarization analyzer from Deep Neural Networks
- Jet Substructure and Multivariate Analysis Aid in Polarization Study of Boosted, Hadronic Fatjet at the LHC