Determining the $CP$ Property of $ht\bar{t}$ Coupling via a Novel Jet Substructure Observable

Abstract

Determining the $CP$ property of the Higgs boson is important for a precision test of the Standard Model as well as for the search for new physics. We propose a novel jet substructure observable based on the azimuthal anisotropy in a linearly polarized gluon jet that is produced in association with a Higgs boson at hadron colliders, and demonstrate that it provides a new $CP$-odd observable for determining the $CP$ property of the Higgs-top interaction. We introduce a factorization formalism to define a polarized gluon jet function with the insertion of an infrared-safe azimuthal observable to capture the linear polarization.

5 pages, 3 figures; match to journal version

References in corpus (8)

• An Introduction to PYTHIA 8.2
• Measurement of the $c$-jet mistagging efficiency in $t\bar{t}$ events using $pp$ collision data at $\sqrt{s}=13$ TeV collected with the ATLAS detector
• Identification of hadronic tau lepton decays using a deep neural network
• Physics at the FCC-hh, a 100 TeV pp collider
• Polarized jet fragmentation functions
• Machine learning the Higgs boson-top quark CP phase
• Probing the CP structure of the top quark Yukawa coupling: Loop sensitivity vs. on-shell sensitivity
• A General Analysis for Observing Quantum Interference at Colliders

Cited by in corpus (1)

• Gluon Polarimetry with Energy-Energy Correlators