Winter Nuclear Particle Physics (WNPPC) 2018

Session

Session #4

17 Feb 2018, 09:00

7. Overview of the Higgs and Standard Model physics at ATLAS [INVITED]

Dr Tamara Vazquez Schroeder (McGill University)

17/02/2018, 09:00

This talk presents selected aspects of recent physics results from the ATLAS collaboration in the Standard Model and Higgs sectors, with a focus on the recent evidence for the associated production of the Higgs boson and a top quark pair.

30. Determination of jet energy resolution in proton-proton collisions of the ATLAS detector (student talk)

Mr Tae Hyoun Park (Carleton University)

17/02/2018, 09:30

The ATLAS detector at the Large Hadron Collider records high energy proton-proton collisions. These collisions can be used to test the Standard Model of particle physics that explain fundamental interactions of the universe. In these collisions, collimated sprays of hadronic particles, known as **jets**, are dominant final state object produced. They are key ingredients for most physics...

26. Measurement of Z bosons produced in association with jets via vector boson fusion at 13 TeV with the ATLAS detector (student talk)

Mr Stephen Weber (Carleton University)

17/02/2018, 09:45

At the large hadron collider, most Z bosons are produced in a qqZ vertex, sometimes in association with jets produced via the strong interaction. A more rare production mode for Z bosons is through a triple gauge coupling via a process called vector boson fusion (VBF). This VBF Z process is similar in nature to VBF Higgs production, which is of great interest and is being studied by large...

16. Search for resonant WZ$\to$lvl'l' Production in Proton-Proton Collisions at $\sqrt{s}$ = 13TeV with the ATLAS Detector (student talk)

Mr Benjamin Freund (Université de Montreal)

17/02/2018, 10:00

After the discovery of the Higgs boson at the LHC, it is important to test whether the Standard Model could be only an effective theory, and whether the Higgs sector could be extended to include theories with higher isospin multiplicity. This talk reports on a search for charged resonances produced by vector boson fusion and decaying via WZ$\to$lvl'l', based on proton-proton collision...

14. First measurement of photon+b production cross sections in pp collisions using the ATLAS detector (student talk)

Mr Sebastien Prince (McGill University)

17/02/2018, 10:15

The production of a photon in association with a bottom quark in proton collisions is sensitive to the bottom quark content of the proton and to the modelling of b quarks in perturbative QCD calculations. A firm understanding of these aspects is required to properly describe background contributions to new physics interactions at high energies involving b quarks. Differential cross sections of...

29. Scale Factors for the ATLAS Muon Triggers (student talk)

Robin Hayes (UBC/TRIUMF)

17/02/2018, 10:45

Triggers are essential for data-taking in the high-rate environment of the ATLAS experiment at the Large Hadron Collider (LHC), where they make decisions at multiple stages about whether to flag a physics event. What is not flagged by the trigger is simply not recorded by ATLAS and not subject to further analysis. The trigger efficiency gives the fraction of events of interest that a trigger...

52. Search for production of supersymmetric particles in final states with missing transverse momentum and multiple b-jets in 2015-2016 LHC p-p collision data with the ATLAS detector (student talk)

Louis-Guillaume Gagnon (Université de Montréal)

17/02/2018, 11:00

Supersymmetry (SUSY), an hypothetical theory which associate new fundamental particles to each Standard Model (SM) particle, is one of the most well-motivated SM extensions and could solve some of its biggest outstanding problems. For example, if the lepton and baryon numbers are conserved, the lightest supersymmetric particle is stable and interacts only weakly providing a viable dark matter...

1. Search for supersymmetry in final states with two same-sign or three leptons and jets using 13 TeV ATLAS data

Otilia DUCU (University of Montreal)

17/02/2018, 11:15

A search for strongly produced supersymmetric particles using signatures involving multiple energetic jets and either two isolated same-sign leptons (e or µ), or at least three isolated leptons, is presented. The analysis relies on the identification of b-jets and high missing transverse momentum to achieve good sensitivity. A data sample of proton–proton collisions at sqrt s = 13 TeV recorded...

17. Sensitivity study of a search for a charged scalar particle in $\sqrt{s}=14$ TeV $pp$ collisions (student talk)

Mr Kays Haddad (McGill University)

17/02/2018, 11:30

Many models that extend the Standard Model Higgs sector predict the existence of at least one charged Higgs boson, in addition to the neutral Higgs boson expected from the Standard Model. While searches have been performed, a charged Higgs boson has not yet been observed. Using physics and detector simulations, the sensitivity of a search for a charged Higgs boson at the forthcoming High...

48. Development of a new B-Physics trigger for the ATLAS Detector at CERN (student talk)

Ms Shreya Saha (McGill University)

17/02/2018, 11:45

A novel B-Physics trigger for the ATLAS detector is being developed to enable lepton universality studies by selecting $B^0\to K^{\ast }{e}^{+}{e}^{-}$ events and complementing the existing $B^0\to K^{\ast }{\mu }^{+}{\mu }^{-}$ trigger. In the Standard Model, lepton universality refers to the fact that the electroweak couplings of the leptons to the gauge bosons is independent of the lepton flavour. A...