17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

Measurement of Higgs couplings and self-coupling at the ILC

20 Jul 2013, 09:15
12m
F1 (KTH Campus)

F1

KTH Campus

Talk presentation Higgs and New Physics Higgs and New Physics

Speaker

Junping Tian

Description

We report on the recent studies of the precision measurement of the Higgs couplings at the ILC based on the full detector simulation of the ILD detector concept at various centre-of-mass energies including 250 GeV, 500 GeV, and 1 TeV. At 250 GeV, the Higgs recoil mass measurement is the key to determining the absolute e+e- -> ZH cross section and hence the absolute model-independent Higgs couplings. Around 350 GeV and above, the e+e- -> nunuH fusion channel is available to study the Higgs. The ILC can measure Higgs branching ratios (BRs) into bb, cc, gg, tautau, WW*, ZZ*, and gammagamma at all energies above 250 GeV. At 500 GeV and above, the e+e- -> ttH process can be used to measure the top Yukawa coupling. At 1 TeV, the Higgs BRs into muon pairs can be obtained due to the increased luminosity. The most precise Higgs couplings are obtained via a global fit. The synergy with the LHC measurements is also discussed. It is a crucial and fundamental task to measure the Higgs self-coupling at the future collider. In this talk, we will also introduce the ILD-DBD benchmark study of ZHH at 500 GeV and vvHH (WW-fusion) at 1 TeV focusing on both Higgs bosons decaying as H->bb.

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Presentation Materials