2013/08/26 by Shin-ichi Kawada, Shin-Ichi Kawada, Kawada, Shin-ichi +9
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.1308.5489
11 pages, 23 figures, 9 tables
arxiv created 2013/08/26 · openalex publication_date 2013/08/26 · arxiv updated 2013/08/27 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
We evaluate the measurement accuracy of the branching ratio of h → τ+ τ- at √(s) = 250 GeV and 500 GeV at the ILC with the ILD detector simulation. For the √(s) = 250 GeV, we assume the Higgs mass of Mh = 120 GeV, branching ratio of Br(h → τ+ τ-) = 8.0 %, beam polarization of P(e-, e+) = (-0.8, +0.3), and integrated luminosity of ∫ L dt = 250 \mathrmfb -1. The Higgs-strahlung process e+ e- → Zh with Z → e+ e-, Z → μ+ μ-, Z → qq mode are analyzed. The measurement accuracy is calculated to be Δ(σ⋅ Br) / (σ⋅ Br) = 3.5 %. The scaled result to Mh = 125 GeV is estimated to be 4.2 %. For the √(s) = 500 GeV, we assume the Higgs mass of Mh = 125 GeV, branching ratio of Br(h → τ+ τ-) = 6.32 %, beam polarization of P(e-, e+) = (-0.8, +0.3), and integrated luminosity of ∫ L dt = 500 \mathrmfb -1. The Higgs-strahlung process e+ e- → Zh with Z → qq mode and WW-fusion process e+ e- → νe νe h are analyzed. The measurement accuracy is calculated to be Δ(σ⋅ Br) / (σ⋅ Br) = 5.7 % for Higgs-strahlung with Z → qq and 7.5 % for WW-fusion.