Conveners
Higgs Physics: 1
- Mingshui CHEN (IHEP)
Higgs Physics: 2
- Enkhbat Tsedenbaljir (Institute of Physics and Technology, Mongolian Academy of Sciences)
Higgs Physics: 3
- Shuo Han (IHEP (高能所))
Description
Zoom Link, ID:99229612134, Code: 887914
Partonic spin correlations in Higgs boson decays provide a novel opportunity to probe the CP structure of the Higgs--gluon coupling at future lepton colliders. Translating this physics potential into a realistic measurement requires the identification of different gluon splitting modes, whose contributions can otherwise largely cancel in inclusive observables. In this work, we take a step...
If the SM-like Higgs boson is realized as a mixture of scalar and pseudoscalar states, the CP violating mixing angle can be measured through various Higgs boson production and decay channels. Here we consider Higgs to tau-pair decays, at 240 GeV CEPC with 5.6 ab-1 of simulated data. Preliminary projections of the absolute uncertainty of the mixing angle are given, for the Higgs boson...
The azimuthal angle difference between the decay planes of the two tau leptons in h to tau+ tau- probes charge-parity (CP) violation in the Higgs-tau Yukawa coupling. In the dominant hadronic channel tau+- to rho+- nu, the spin-analyzing power is suppressed by the mixture of longitudinal and transverse rho polarizations. We propose an energy-correlator (E4C) inspired method that weights each...
Precise measurements of Higgs decays into quarks and gluons are essential for probing the Yukawa couplings of the Higgs boson and testing the flavor structure of the Standard Model. We investigate the process e+e− → ZH at √s = 240 GeV at a future e+e− Higgs factory, taking the CEPC design as a benchmark. The analysis focuses on events with Z → νν¯/mu+mu- and hadronic Higgs decays H → b¯b, cc¯,...
The CEPC experiment is aimed at high precision measurements, which opens a possibility to find deviations from the Standard Model predictions and indications of new physics. The proposed CEPC detectors incorporate many technological achievements accompanied by advanced reconstruction tools. In this talk, further enhancements of Higgs boson studies with recoil mass technique are described. The...
We combine the latest experimental data to investigate the potential of future precision measurements at the CEPC to probe new physics beyond the Standard Model, focusing on the Type-II two Higgs doublet model (Type-II 2HDM). The contributions from the heavy Higgs bosons at both the tree level and the one-loop level are included over the full parameter space. We perform a multiple variable...
The electron Yukawa coupling has not yet been directly tested at the strength predicted by the Standard Model. An electron–positron collider operating at the Higgs pole can probe this coupling through resonant s-channel Higgs production, although the tiny signal rate and large continuum backgrounds make the measurement exceptionally challenging.
We investigate e⁺e⁻ → H → gg in a conditional...
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Vertex detectors are essential for high-precision Higgs measurements at electron-positron Higgs factories. Focusing on H→ccˉ and H→ssˉ decays in the ννˉH channel, we optimize the vertex detector’s inner radius and spatial resolution via the AI-based Jet Origin Identification (JOI) flavour-tagging framework.
Shrinking the inner radius and boosting spatial resolution improve impact parameter...
