Sensitivity to longitudinal vector boson scattering in semileptonic final states at the HL-LHC

Longitudinal vector boson scattering provides an important probe of electroweak symmetry breaking, bringing sensitivity to physics beyond the Standard Model as well as constraining prop- erties of the Higgs boson. It is a diffcult process to study due to the small production cross section and challe...

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Bibliographic Details
Published in:Physical review. D 2021-11, Vol.104 (9), Article 093002
Main Authors: Roloff, Jennifer, Cavaliere, Viviana, Pleier, Marc-André, Xu, Lailin
Format: Article
Language:English
Subjects:
Electroweak interaction
Gauge bosons
Hadron colliders
HL-LHC
Machine learning
NUCLEAR PHYSICS AND RADIATION PHYSICS
Particle data analysis
Polarization
Polarization in interactions & scattering
semi-leptonic
W & Z bosons
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Summary:Longitudinal vector boson scattering provides an important probe of electroweak symmetry breaking, bringing sensitivity to physics beyond the Standard Model as well as constraining prop- erties of the Higgs boson. It is a diffcult process to study due to the small production cross section and challenging separation of the diferent polarization states. We study the sensitivity to longitu- dinal WV vector boson scattering at the High-Luminosity Large Hadron Collider in semi-leptonic final states. While these are characterized by larger background contributions compared to fully leptonic final states, they benefit from a higher signal cross section due to the enhanced branching fraction. We determine the polarization through full reconstruction of the event kinematics using the W boson mass constraint and through the use of jet substructure. We show that with these techniques sensitivities around three standard deviations at the HL-LHC are achievable, which makes this channel competitive with its fully leptonic counterparts.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.104.093002