International Workshop on Future Linear Colliders 2026

Session

Flavor, Top and QCD

11 Nov 2026, 14:30

KEK

33. Probing CP violation in (e^+e^- \to t\bar tH) at a 550 GeV Linear Collider with Machine-learned Observable

Yuyang Zhang (University of Glasgow)

11/11/2026, 14:30

Flavor, Top and QCD

Oral presentation (onsite)

The observed matter–antimatter asymmetry of the Universe motivates searches for new sources of CP violation beyond the Standard Model. The Higgs interaction with the top quark, the heaviest known elementary fermion, provides a particularly well-motivated place to search for such effects. A high-energy linear (e^+e^-) collider offers a clean and well-defined initial state, controllable beam...

100. Disentangling new physics with quantum entanglement in top-pair production at future lepton colliders

Prof. Kentarou Mawatari (Iwate U.)

11/11/2026, 14:50

Flavor, Top and QCD

Oral presentation (onsite)

We investigate quantum entanglement and Bell-inequality violation in top-antitop pair production at future lepton colliders. We examine how those in the SM are modified in several well-motivated extensions of the SM:(i) a neutral scalar mediator that couples to charged leptons and top quarks via Yukawa interactions and contributes as an additional s-channel exchange; (ii) the minimal gauged...

145. Experimental prospects for quantum decoherence measurements at colliders

Guillermo Garcia Mir (Univ. of Valencia and CSIC (ES))

11/11/2026, 15:10

Flavor, Top and QCD

Oral presentation (onsite or remote - not decided)

Quantum entanglement is one of the defining features of quantum mechanics. In high-energy colliders, quantum properties are experimentally accessible, the most important example being top quark pair production at the LHC. This channel led to the discovery of spin entanglement in 2024 [1-2].

In this work [3], we study how energetic final-state radiation modifies the spin entanglement of...

71. Toponium at the ILC revisited

Yajuan Zheng

12/11/2026, 11:00

Flavor, Top and QCD

Oral presentation (onsite)

Spin singlet toponium $\eta_t$ has been discovered at the LHC by using di-lepton angular correlation of semileptonically decaying top and anti-top quarks. We study di-lepton distribution from spin triplet toponium states, $\Theta$ and $\chi_t^1$, which are produced in $e^+e^-$ annihilation. We examine asymmetries in the dilepton distributions observable with beam polarization at the ILC.

225. Heavy Neutral Leptons at Beam Dump Experiments of Future Lepton Colliders

Douglas Tuckler (TRIUMF)

1

Flavor, Top and QCD

Oral presentation (remote)

A new beam dump experiment that utilizes the beams of future high energy electron-positron collider could be an excellent avenue to search for dark sector particles due to its unprecedented high energy and intensity. We consider heavy neutral leptons (HNLs) as a specific example to demonstrate the sensitivity of searches for dark sector particles at future electron-positron collider beam dump...

146. Strange Flavor Tagging with the ILD Concept at FCC-ee: Impact of V0 Reconstruction and Machine Learning-Based Approaches

Nagomi Dogishi (University of Tokyo (JP))

Flavor, Top and QCD

Poster (onsite only)

Flavor tagging is a key requirement for the physics program of future e+e- colliders such as FCC-ee, where precision measurements of Higgs, electroweak, and flavor physics observables rely on the ability to identify quark flavors in hadronic final states. While charm and bottom tagging have been extensively studied, strange quark tagging remains comparatively underdeveloped despite its...

226. Top quark rare processes at future linear colliders

Dr Adil Jueid (Korea Institute for Advanced Study)

1

Flavor, Top and QCD

Oral presentation (remote)

In this talk, I will explore the potential of future linear colliders to discover rare processes involving the top quark. I will begin by reviewing the current status of theoretical predictions and experimental searches at the LHC. I will then discuss the relevant production and decay channels within a model-independent framework, highlighting their discovery prospects at future linear colliders.