Searches for electroweakinos in one-lepton final states at ATLAS and study of CMOS sensor for ITk replacement in second-half of HL-LHC
by
Online
Abstract
Supersymmetry (SUSY) is one of the most favorable extensions of the Standard Model (SM). This theory provides a solution to the hierarchy problem in the Higgs boson mass, a viable candidate for Dark Matter, and a possibility for couplings unification. Among SUSY particles, charginos and neutralinos, which are linear superpositions of susy partners of the SM Higgs and gauge bosons and collectively referred to as electroweakinos, are preferred in many new physics searches at ATLAS due to the relatively low QCD background of their production processes. Additionally, in scenarios where the strongly produced SuSY particles are heavier than a few TeV, these processes may be the dominant susY production mechanism at the Large Hadron Collider (LHC). In this seminar, I will present searches for pair production of electroweakinos in final states with one lepton (electron or muon) accompanied by jets and missing transverse momentum using the full Run 2 data recorded by the ATLAS detector.
In the High Luminosity LHC (HL-LHC) phase, ATLAS will fully replace its current Inner Detector with a new all-silicon Inner Tracker (ITk). Because of radiation limits, the innermost layers of ITk will be exchanged after having integrated a luminosity of 2000 fb-1 ie by the HL-LHC half-life. For this replacement, CMOS sensors, with their commercially mature technology and their achievable monolithic design, become promising candidates to take the place of the traditional pixel sensors. In this seminar, I will also present a preliminary study for the use of CMOS sensors in the IT replacement using simulation with single muon samples.
Biography
Ngoc-Khanh VU recently obtained his PhD from the University of Aix-Marseille, France, in December 2021 under the supervision of Dr. Steve MUANZA and Dr. Farès DJAMA. During his thesis (2018-2021), he worked within the ATLAS group of the Centre de Physique des Particules de Marseille (CPPM) as the main contributor to searches for SUSY electroweak production in one-lepton final states at the LHC Run 2. In addition, he also got involved in several instrumentation studies at CPPM, related to the ATLAS pixel detector and the ITk detector. Before the PhD, from 2017 to 2018, he attended the Master 2 P3TMA program at the Aix-Marseille University for my Master's degree, and from 2012 to 2016, he studied at the Ho Chi Minh City University of Sciences, Vietnam, for his Bachelor's degree. His research interests include the Higgs/electroweak sector, BSM physics, and detector development. He is also interested in the performance study of physics objects and Machine Learning techniques for particle physics.
Zoom Meeting: https://cern.zoom.us/j/64249636107?pwd=Rldha3QrclBtZDNLYldmdHUydkVjQT09
Meeting ID: 642 4963 6107
Passcode: 304621
