ttW production at the LHC: theoretical and experimental challenges

by Giuseppe Bevilacqua (NCSR Demokritos), Tamara Vazquez Schroeder (CERN)

Thursday 13 Jul 2023, 11:00 → 13:00 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

The process of top-quark pair production in association with a W boson (ttW) has been the subject of a long-standing interest, both as signal and as dominant background source for many searches, in light of persisting tensions between theoretical predictions and the LHC data. In this talk we will discuss the most recent advancements in the study of this process taking the perspective of both theoretical modelling and experimental analysis.
The discussion of theoretical aspects is organised in two parts. In the first part, we will focus on predictions concerning inclusive ttW production rates. In the second part we will address more exclusive final states and discuss recent advancements in the modelling of multilepton signatures in presence of fiducial phase space cuts. 
On the experimental side, the latest ttW inclusive and differential cross section measurements will be discussed, with particular emphasis on the ATLAS result with full Run 2 dataset. Recent improvements in the analysis of multilepton final states enabling a more precise ttW cross section measurement, as well as the findings from the first ttW differential measurement will be presented.
 

Tamara Vazquez Schröder received her Diploma degree in Physics at the University of La Laguna, Tenerife, Spain, and did her PhD on top quark physics at the University of Göttingen, Germany. She worked as a post-doc with the University of McGill, Montreal, Canada until 2018; she was a CERN Research Fellow from 2018 to 2020, and she is currently CERN Research LD Staff. She has lead the tt̄H and tH analyses from 2019 to 2021 and the exotics searches for new physics with leptons from 2021 to 2022. She is currently leading the exotics searches within the ATLAS Collaboration.

Giuseppe Bevilacqua obtained his PhD at the University of Torino, Italy, and held postdoctoral positions at NCSR Demokritos, RWTH Aachen University, the INFN Frascati Laboratories and Debrecen University. He is currently research fellow at NCSR Demokritos. His primary research interests lie in precision collider phenomenology of the Standard Model, with special focus on perturbative QCD and Top Quark physics at the LHC.