10-17 July 2019
Ghent
Europe/Brussels timezone

Vetoing Tops without B-Tagging

12 Jul 2019, 12:00
15m
Campus Ledeganck - Aud. 3 (Ghent)

Campus Ledeganck - Aud. 3

Ghent

Parallel talk Top and Electroweak Physics Top and Electroweak Physics

Speaker

Richard Ruiz (Universite Catholique de Louvain)

Description

At TeV-scale hadron colliders, such at the CERN LHC and proposed future facilities at $\sqrt{s}=28-100$ TeV, single and pair production of top quarks invariably constitute a major background in multi-lepton searches for new, TeV-scale particles, such as $W'$ gauge bosons, smuons $(\tilde{\mu})$, and heavy neutrinos $(N)$. Due to imperfect tagging efficiencies, however, vetoing events according to the presence of $b$-jets has limitations. A newly proposed (dynamic) jet veto scheme, one where the veto threshold is set on an event-by-event basis and is capable of rejecting a majority of top quark events while retaining a high $(> 90-95\%)$ signal efficiency without invoking heavy quark flavor-tagging, is presented. Impact on heavy neutrino and smuon searches will be discussed.

Primary author

Richard Ruiz (Universite Catholique de Louvain)

Presentation Materials