Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 90: Higgs Boson: Associated Production 2
T 90.8: Vortrag
Donnerstag, 24. März 2022, 18:00–18:15, T-H21
Prospects of measuring the Higgs self-coupling at the ILC — •Julie Torndal1,2, Jenny List1, and Yasser Radkhorrami1,2 — 1Deutsches Elektronen-Synchrotron DESY, Hamburg — 2Universität Hamburg, Hamburg, Germany
The Higgs-self coupling is a key feature in understanding the Higgs potential and hence the underlying mechanism that provides mass to the elementary particles. Any deviations from the Standard Model (SM) could indicate new physics beyond the SM.
Experimentally, the measurement of the Higgs self-coupling poses many challenges due to the very small production cross sections and multi-jet final states. The International Linear Collider offers a clean experimental environment at energies above the threshold of double Higgs-strahlung. Since the Higgs self-coupling was last studied (5-8 years ago) there have been tremendous progress for high-level reconstruction tools which could lead to a large improvements in the sensitivity.
In this contribution, we revisit the projections made for the Higgs self-coupling measurement at the ILC at a center-of-mass energy of 500 GeV and study the effects of improvements made in the high-level reconstruction tools.