Dzhelepov Laboratory of Nuclear Problems

Date and Time: Monday, 20 April 2020, at 11:00 AM

Venue: Online conference in Zoom

Seminar topic: “Search for excited electrons and diboson resonances in the lepton, neutrino and jets final state with the ATLAS detector at the LHC”

Speaker: Evgenia Cheremushkina (NRC «Kurchatov Institute» – IHEP)

Abstract:

The report presents the results, obtained in terms of the thesis titled “Search for excited electrons and diboson resonances in the lepton, neutrino and jets final state with the ATLAS detector at the LHC” for the candidate of physical and mathematical sciences degree, the specialty 01.04.23 – high energy physics.

One of the topical areas of high energy physics research is the search for the signs of the “new physics” – the Standard Model (SM) extensions. One of such possible signs is the observation of the singly produced excited electrons predicted by various composite models, which are introduced to explain the existence of observed fermions in SM, their three generations, and mass distribution. The search for excited electrons was produced in pp collisions at the center-of-mass system energy of 13 TeV, which allowed the most stringent limits on the composite model parameters to be set.

In addition, a search for diboson resonances was performed within the extended Randall – Sandrum model, which allows to explain the gravitational interaction weakness, and the extended calibration model, which has the phenomenological properties of many SM gauge sector extensions. The search for diboson resonances was carried out earlier and is currently ongoing with the ATLAS and CMS experiments at the LHC.