Conveners
Parallel - WG1-HTE: Hss and ZH
- Karsten Köneke (University of Freiburg)
- Fabio Maltoni (UCLouvain/Unibo)
- Chris Hays (Oxford University)
Parallel - WG1-HTE: Joint HTE+SRCH session
- Fabio Maltoni Maltoni (UCL)
- Karsten Köneke (University of Freiburg)
- Chris Hays (Oxford University)
- Rebeca Gonzalez Suarez (Uppsala University (SE))
Parallel - WG1-HTE: ===> HTE+PREC
- Fabio Maltoni (UCLouvain/Unibo)
- Patrick Koppenburg (Nikhef)
- Jenny List (DESY)
- Karsten Köneke (University of Freiburg)
- Chris Hays (Oxford University)
- JORGE DE BLAS (University of Granada)
We report on the latest sensitivity studies of FCC-ee to the measurement of the branching ratios of Higgs boson decays to quark-antiquark pairs and gluons.
The studies use simulated events scaled to integrated luminosities of 10.8/ab of sqrt(s)=240 GeV and 3.0/ab of sqrt(s)=365 GeV.
Jet flavour tagging is exploited to distinguish among different Higgs boson decays.
Various final states...
Higgs to ss analysis is one of the ECFA HTE focused topics. We are working on the H->ss analysis using ILD full simulation based on a previous ILD study on H->bb/cc/gg branching ratio measurement and a latest DNN-based jet flavor tagging tool. This talk will focus on the application of strange tagging to the H->ss analysis including performance studies of strange tagging as well as results on...
The ParticleNet tagger is a graph neural network devoted to the tagging of jets from the hadronization of multiple flavors at the FCC-ee. Its impressive and unprecedented tagging performance allows for accessing rare and challenging hadronic final states. This study shows the fast-simulation-based characterization of the ParticleNet performance evolution as a function of the IDEA vertex...
The FCC-ee is a potential future Higgs factory that can continue to probe the validity of the electroweak theory. One of the key tasks is to study how the next generation of particle detectors can be optimised to study the Higgs boson in detail. This study uses the ZH process, where both the Higgs and Z decay to a pair of jets, to investigate the impact of changing the flavour tagger...
We explore the possibility of CP-violation in the complex-singlet extension of 2HDM. The addition of complex singlet paves the way for additional sources of CP-violation compared to 2HDM. If a Z2-symmetry is imposed on the complex-singlet, it can accommodate a dark matter candidate as well. We identify the regions of parameter space, that can fit DM observables and at the same time generate...
We study possible CP-violation effects of the Higgs to Z-boson coupling
at a future e^+ e^- collider, e.g. the International Linear Collider (ILC). We find that the azimuthal angular distribution of the muon pair, produced by e+ e- -> H Z -> H mu+ mu-, can be sensitive to such a CP-violation effect when we apply initial transversely polarized beams. Based on this angular distribution, we...
I will discuss the measurement of the tau polarisation at a Higgs Factory in the process e+ e- -> tau+ tau-, both at the nominal centre-of-mass energy and the radiative return to the Z. Aspects of required detector performance will also be discussed.
The data sample of $6⋅10^{12}$ Z boson decays expected to be produced at the FCC-ee offers unprecedented opportunities for the precise measurement of physics observables. One of the areas in which large improvements are foreseen is the determinations of tau lepton properties (lifetime, leptonic/hadronic widths, mass), allowing for key tests of lepton universality. These measurements will...
Electroweak Precision Measurements are stringent tests of the Standard Model and sensitive probes to New Physics. Accurate studies of the Z-boson couplings to the first-generation quarks could reveal potential discrepancies between the fundamental theory and experimental data. Future e+e- colliders running at the Z pole and around the ZH threshold would be an excellent tool to perform such a...
At the Future e+e- Circular Collider a long data taking period is also foreseen at the ttbar production threshold and slightly above, up to sqrt(s)=365 GeV, with more than 300 000 ZH events expected at these energies. We study the precision which can be reached with this dataset on the Higgs mass, and combine it with the measurement obtained with the same recoil mass technique in the e+e- and...
The Higgs mass as one of the fundamental parameters in the Standard Model has been already measured with a precision of 140 MeV with the data collected so far at the LHC. However in some cases of looking for small deviations from the SM, current precision or projection of the Higgs mass measurement at the LHC or HL-LHC may not be enough. One prominent example is for the SM prediction of the...
In this contribution we report on progress in the prospects for the measurement of top quark properties in a scan of the center-of-mass energy through the top quark pair production threshold. Several aspects of the threshold scan are studied in greater detail, including in particular the experimental selection in a new study with a parameterized simulation of the IDEA detector response in the...
I will discuss the quantum entanglement between spins and orbital angular momentum in H -> WW, ZZ decays, for Higgs produced in the Drell-Yan process at e+e- colliders. I will also address the possibility to observe new physics contributions to the HVV interactions via the analysis of multi-dimensional angular distributions in those decays.
