International Workshop on Future Linear Colliders 2026

Session

Joint: Higgs/EW and Global Analysis

11 Nov 2026, 16:30

KEK

59. ILC, FCC-ee Precision Polarimetry with Difermion and Vector Boson Event Fits

Brendon Madison (University of Kansas)

11/11/2026, 16:30

Higgs and Electroweak

Oral presentation (onsite or remote - not decided)

Precision measurements, especially for integrated luminosity using diphotons, put strict demands on beam polarimetry at future e+e- colliders. This is strictest at the Z pole, where methods to achieve order 10^{-4} on polarimetry are needed. We entertain multiple scenarios for ILC and FCC-ee as the setting for this study. Paths towards order 10^{-4} on polarimetry using Difermion and vector...

57. Assessing uncertainties in the determination of the trilinear Higgs self-coupling from single-Higgs observables

Murillo Rebuzzi Ardións Vellasco (University of Bonn (DE))

11/11/2026, 16:48

Higgs and Electroweak

Oral presentation (onsite)

Probing the shape of the Higgs potential is a primary objective of the next generation of flagship particle physics experiments, for which measuring $\lambda_\mathrm{hhh}$, the trilinear Higgs self-coupling, will play a crucial role. Despite operating below the di-Higgs production threshold, circular $e^{+}e^{-}$ machines will still have indirect access to $\lambda_\mathrm{hhh}$ via its...

104. Probing SMEFT Effects in VBS Vh Production at TeV-Scale Lepton Colliders

Hiroyuki Furusato (Iwate University)

11/11/2026, 17:06

Higgs and Electroweak

Oral presentation (onsite)

We demonstrate that the Feynman-Diagram (FD) gauge provides a transparent decomposition of SMEFT contributions according to scattering mechanisms and gauge-Higgs interaction vertices, enabling a direct physical interpretation of Wilson-coefficient effects in electroweak scattering. Building upon this framework, we study SMEFT effects in Zh production associated with neutrinos at future...

70. Triple Gauge Couplings: Using Optimal Observables at the Detector Level

Leonhard Reichenbach (CERN / University of Bonn (DE))

11/11/2026, 17:24

Higgs and Electroweak

Oral presentation (onsite)

We perform optimal-observable-based fits to assess the statistical reach of future $e^+e^-$-colliders for determining anomalous triple gauge couplings (aTGC) at the detector level.
Precise constraints on aTGCs are vital inputs to global SMEFT fits, yet current projections either come from theory-only studies or do not use the full event information.
We fill this gap with an analysis based on...

119. Recoil Mass -- Version 2

Junping Tian (University of Tokyo)

11/11/2026, 17:42

Oral presentation (onsite)

Abstract

The model-independent measurement of the inclusive (ZH) production cross section using the recoil-mass technique is a flagship measurement at future (e^+e^-) Higgs factories, providing a unique and model-independent normalization for Higgs couplings. However, the precision of this method is significantly affected by energy loss from beamstrahlung and initial-state...