Speaker
Description
To enhance the scientific discovery power of high-energy collider experiments, we propose and realize the concept of jet-origin identification that categorizes jets into five quark species (b; c; s; u; d), five corresponding antiquarks, and the gluon.
Using state-of-the-art algorithms and simulated ν¯νH, H → jj
events at 240 GeV center-of-mass energy at the electron-positron Higgs factory, the jet-origin identification simultaneously reaches jet flavor tagging efficiencies ranging from 67% to 92% for bottom, charm, and
strange quarks and jet charge flip rates of 7%–24% for all quark species.
We apply the jet-origin identification to Higgs rare and exotic decay measurements at the nominal luminosity of the Circular Electron Positron Collider and conclude that the upper limits on the branching ratios of H → s¯s; u¯ u; d¯d and H → sb; db; uc; ds can be determined to 2 × 10−4 to 1 × 10−3 at 95% confidence level.
The derived upper
limit for H → s¯s decay is approximately 3 times the prediction of the standard model.
We also discuss its impact on other physics measurements at High energy frontier.
