Münster 2017 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 50: Higgs-Boson 5 (assoziierte Produktion)

T 50.3: Vortrag

Dienstag, 28. März 2017, 17:15–17:30, JUR 5

Search for top associated Higgs production with the final state of two electrons or muons and one hadronically decaying tau at 13 TeV with ATLAS — •David Hohn, Nello Bruscino, Markus Cristinziani, Jürgen Kroseberg, Andrea Sciandra, and Norbert Wermes — Physikalisches Institut, Universität Bonn

The production of the Higgs boson in association with a top quark pair (ttH) is predicted by the Standard Model (SM), but not yet experimentally measured. The discovery of this process will provide knowledge of the top Yukawa coupling, which is important to understand the origin of mass of the fermions. This coupling is constrained from other measurements that involve top quarks in virtual loops. The ttH process involves the direct interaction between a Higgs boson and top quarks and is therefore able to directly measure the coupling. The measurement will be another probe of the consistency of the Higgs boson with the SM.

Analyses with many leptons and jets are sensitive to the ttH process. The channel with two electrons or muons of opposite electric charge and one hadronic tau has been analysed with 13 TeV data from ATLAS. The main background is tt production with jets faking hadronic taus. This background is estimated with a data-driven method and suppressed using boosted decision trees. The preliminary estimated sensitivity is competitive with other ttH analysis channels.