Springer Theses: Standard Model Measurement, Supersymmetry Searches, Excesses, and Upgrade Electronics

Resseguie, Elodie

This thesis discusses searches for electroweakly produced supersymmetric partners of the gauge and the Higgs bosons (gauginos and higgsinos) decaying to multiple leptons, using pp collisions at sqrt(s) = 13 TeV. The thesis presents an in-depth study of multiple searches, as well as the first 13 TeV cross section measurement for the dominant background in these searches, WZ production. Two searches were performed using 36.1/fb of data: the gaugino search, which makes use of a novel kinematic variable, and the higgsino search, which produced the first higgsino limits at the LHC. A search using 139/fb of data makes use of a new technique developed in this thesis to cross check an excess of data above the background expectation in a search using a Recursive Jigsaw Reconstruction technique. None of the searches showed a significant excess of data, and limits were expanded with respect to previous results.

Details

Published by: Springer

Publication Date: 2021-11-05

Format: Paperback

ISBN-13: 9783030570187

DOI: 10.1007/978-3-030-57016-3

Dimensions: 235cm x155cm

Pages: 322