Second ECFA Workshop on e+e- Higgs/EW/Top Factories, October 11-13, 2023, in Paestum (Salerno)

Session

Parallel - WG1-HTE

11 Oct 2023, 16:00

Hotel Ariston, Paestum

Conveners

Parallel - WG1-HTE

• Fabio Maltoni (Istituto Nazionale di Fisica Nucleare)
• Chris Hays (Oxford University)
• Karsten Köneke (Universität Freiburg)

31. Search for Invisible Decays of the Higgs Boson at the ILC Using key4HEP

Carsten Hensel (Centro Brasileiro de Pesquisas Físicas (CBPF))

11/10/2023, 16:00

WG1-HTE - Physics Potential: Higgs, top, and electroweak

ORAL

Technologically mature accelerator and detector design and a well-understood physics program make the ILC a realistic option for the realization of a future Higgs factory. Energy staged data collection, employment of beam polarization, and capability to reach a TeV center-of-mass energy, enable unique sensitivity to New Physics deviations from the Standard Model predictions in the Higgs sector...

62. Challenges and Solutions in Reconstructing Higgs Decays to Heavy Flavour Jets

Leonhard Reichenbach (CERN / University of Bonn)

11/10/2023, 16:26

WG1-HTE - Physics Potential: Higgs, top, and electroweak

ORAL

The reconstruction of heavy flavour jets will play an important role at future e+e- Higgs factories: $H\to b\overline{b}$ is the most frequent decay mode of the SM Higgs, and $H\to c\overline{c}$ is particularly challenging to measure at the LHC. Also exotic scalars could decay into these modes, and b- and/or c-jets occur frequently in top quark as well as Z and W boson decays. While the reconstruction...

57. Novel $b$-hemisphere jet charge tagger at FCC-ee

Lars Roehrig

11/10/2023, 16:52

WG1-HTE - Physics Potential: Higgs, top, and electroweak

ORAL

The talk presents the feasibility of a novel $b$-hemisphere tagger and its application at the Tera-$Z$ programme at FCC-ee for the measurement of the partial width $R_b$ and the $b$-quark forward-backward asymmetry $A_{\text{FB}}^b$. By exclusively reconstructing $b$-hadrons in the hemispheres, the major source of systematic uncertainties originating from light- and $c$-physics is eliminated....

109. Electroweak couplings of light quark at future linear colliders [zoom]

Yuichi Okugawa (Université Paris-Saclay)

11/10/2023, 17:18

WG1-HTE - Physics Potential: Higgs, top, and electroweak

ORAL

The differential and total cross section or related observables of difermion production in high e+e- collisions bear a considerable potential for the discovery of the onset of new physics as the centre-of-mass energy increases. Most of these measurements are only possible due to beam polarisation. Earlier measurements have reported on the determination of the differential cross sections of b,...

21. Decoding Higgs Boson Branching Ratios from Event Shape Variables

Daniel Reichelt (Durham University, IPPP)

WG1-HTE - Physics Potential: Higgs, top, and electroweak

ORAL

In this talk I will introduce a novel strategy [1] for the simultaneous measurement of Higgs-boson branching ratios into gluons and light quarks at a future lepton collider operating in the Higgs-factory mode. The method is based on template fits to global event-shape observables, and in particular fractional energy correlations, thereby exploiting differences in the QCD radiation patterns of...