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T: Fachverband Teilchenphysik

T 24: Higgs-Kopplungen (Theorie/Experiment)

T 24.8: Vortrag

Montag, 24. März 2014, 18:30–18:45, P1

Prospects for the measurement of the branching fractions of Higgs to b and c quarks and to gluons at CLIC at 350 GeV. — •Marco Szalay — Max Planck Institut für Physik, München

One key component of the physics program at the Compact LInear Collider (CLIC), a planned energy frontier linear e⁺e⁻ collider at CERN, is the full exploration of the Higgs sector to understand the mass generation mechanism in detail. This experimental program includes the measurement of branching fractions of decays into various fermions and bosons, the coupling to the top quark and the self coupling.

The present study evaluates the achievable accuracies of the Higgs boson branching fractions to b and c quarks, as well as to gluons, for the CLIC_ILD detector using Monte Carlo generated samples with a Higgs mass of 126 GeV at the center-of-mass energy of 350 GeV. The Higgs production mechanism under investigation is ZH production ("Higgsstrahlung"), with the Z further decaying into neutrinos, leptons or quarks. The jet reconstruction for the hadronic decays benefits from the high granularity of the calorimetric subdetectors and from particle flow algorithms that allow for unprecedented accuracies in the channels involving jets in the final state. Multivariate techniques are performed on every jet to determine its flavor, separating b, c and light jets, and to separate signal events from physics background.