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Top quark couplings: challenging the Standard Model
by
DrMaria Moreno Llacer
(CERN)
→
Asia/Shanghai
A623
A623
Description
Speaker: Dr. María Moreno Llácer
Title: "Top quark couplings: challenging the Standard Model”
Abstract:
The top quark is unique among the known quarks since it decays before it has an opportunity to form hadronic bound states. This makes measurements of its properties particularly interesting as one can access directly the properties of a bare quark. Given its large mass (the heaviest fundamental particle), the top quark may play a special role in the electroweak symmetry breaking (EWSB) and therefore, new physics related to EWSB may be found ?first in top quark precision measurements. Possible new physics signals would cause deviations of the top quark couplings from the Standard Model (SM) prediction. It couples to the SM fi?elds through its gauge and Yukawa interactions. Some of these couplings were investigated at the Tevatron, through studies of the Wtb vertex and the tt? production, while others, such as the tt?Z and tt?H production, are becoming accessible only with the high statistics top quark sample at the LHC. The latest measurements of these properties with the ATLAS detector at the LHC will be presented in this seminar.
About the speaker:
I am an experimental physicist working at the CERN ATLAS group as research fellow. I obtained my PhD in Valencia (Spain) on the commissioning of the ATLAS experiment and top-quark physics analysis. In 2013, I started as postdoctoral researcher in Goettingen (Germany) and worked on the search for Higgs bosons produced in association with top-quark pairs, Monte-Carlo validation and modeling studies. Now, my primary research interest is the understanding of the top-quarks couplings to bosons (Higgs, W and Z). In addition, I am contributing to the upgrade of the ATLAS pixel detector and to the R&D for future silicon detectors.
I was subconvener of the MC validation subgroup within the Physics Modelling Group (PMG) and I am now currently subconvener of the TopProperties subgroup within the Top Working Group. In one month, I will become the new ATLAS convener of the tH/ttH group in the LHC Higgs cross section WG1 (HXSWG1).
