Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 51: Suche nach Physik jenseits des Standardmodels III
T 51.10: Vortrag
Mittwoch, 21. März 2018, 18:50–19:05, Philo-HS4
A search for high-mass resonances decay to τν in pp-collisions at √s=13 TeV with the ATLAS detector — •Christos Vergis, Will Davey, and Jochen Dingfelder — Physikalisches Institut, Universität Bonn, Germany
Many models beyond the Standard Model predict the existence of new heavy charged (W′) gauge bosons. In case of leptonic W′ decays, the signature is a high-pT lepton and large missing energy from the emitted neutrino. Although searches for W′→ e/µ are more sensitive than W′→ τν for universal coupling to leptons, decays to tau lepton are well suited for models in which the W′ couples preferentially to third-generation fermions.
The search for heavy resonances decaying to a tau lepton and a neutrino is performed in events where the tau lepton decays hadronically, using 36.1 fb−1 of pp-collision data at √s=13 TeV recorded by the ATLAS detector at the LHC. This is the first search for W′ bosons in this decay channel from ATLAS. No significant excess of events over the Standard Model expectation was found and 95% CL upper limits are set on the visible τν production cross section, σ(pp→τν+X) · B· A · є. W′ bosons with masses below 3.74 TeV (SSM) and 2.1-3.76 TeV (non-universal models) are excluded, significantly improving the limits set by other searches for new gauge bosons with non-universal couplings.
In this talk, an overview of the W′→τν analysis and the current results will be given.