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Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 67: Higgs-Boson (assoziierte Produktion) III

T 67.5: Talk

Wednesday, March 2, 2016, 17:45–18:00, VMP5 HS B1

Kinematic Reconstruction of the Higgs Mass at the ILC — •Aliakbar Ebrahimi1,2 and Jenny List11Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg — 2Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg

The International Linear Collider (ILC) is a future e+e collider with center-of-mass energies of 200 to 500 GeV, upgradeable to 1 TeV. The aim of the ILC comprises precision measurements of known and possible new particles in the clean experimental conditions of a lepton collider.

A well established method to reach ultimate precision on the Higgs mass is to measure the recoil of the Higgs against a Z boson in e+eZH with Z→ µ+µ at center-of-mass energy of 250 GeV. In order to reach the level of 10−20 MeV precision, a substantial amount of running time (more than 5 years) needs to be spent at this rather low center-of-mass energy.

An important question is to understand whether this is the only method to reach this level of precision, or whether alternatives applicable at higher center-of-mass energies exist. Therefore, we investigate the potential of direct kinematic reconstruction of Higgs decays using the dominant hadronic decays of the Higgs bosons, in particular Hbb. The study is based on full simulation of one of the two proposed detectors for the ILC, the International Large Detector (ILD), at center-of-mass energies of 350 and 500 GeV.

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