ILC-Japan physics seminar #2: Higgs self-coupling

Thursday 27 Feb 2025, 14:30 → 16:00 Asia/Tokyo

ILCやヒッグスファクトリーの物理を主なトピックとして、ILC-Japan physics seminarをZoomにて定期開催します。
第二回のテーマはHiggs self-couplingです。講演は英語です。

We (as ILC-Japan physics WG) will hold a series of seminars related to physics on ILC and Higgs factories. The topic of the second seminar is Higgs self-coupling. Talks will be given in English.

Zoom connection info:

https://u-tokyo-ac-jp.zoom.us/j/84554632255?pwd=ULm1jI5ElV05sHzpTw1NWeDhHZuFD1.1

meeting ID: 845 5463 2255
passcode: 843129

14:30 → 14:35 Status around ILC/Higgs factories

Speaker: Taikan Suehara (ICEPP, The University of Tokyo)

250227-status-ilcjphys-suehara.pdf

14:35 → 15:35 Higgs Self-Coupling Determination at Future Higgs Factories

Determining the Higgs self-coupling is a key milestone in particle physics, offering direct insight into the Higgs potential responsible for electroweak symmetry breaking. Precise measurements of this coupling are crucial for understanding the electroweak phase transition in the early universe and could provide a possible explanation for the matter-antimatter asymmetry. However, measuring the Higgs self-coupling remains a significant challenge at both the (HL-)LHC and future Higgs factories. In this talk, we explore the prospects of extracting the triple Higgs self-coupling via di-Higgs and single-Higgs processes at an e⁺e⁻ collider with center-of-mass energies up to 1 TeV. We outline a model-independent strategy for determining the Higgs self-coupling, present experimental analyses based on full detector simulations, and discuss potential avenues for improving measurement precision.

Speaker: Junping Tian (University of Tokyo)

Hself_ILCJ20250227.pdf