Hochschulschrift

Search for the top squark in semileptonic final states in compressed scenarios with the ATLAS detector

Zusammenfassung: The thesis is focused on supersymmetry searches for the top-squark pair production with one lepton, jets and missing transverse momenta for compressed scenarios. Compressed scenario refers to signal models, where mass difference between some supersymmetric particles is small.All considered decay channels are assumed to be with branching ration of 100%. The results are based on data corresponding to an integrated luminosity of 20/fb recorded at center-of-mass energy of 8 TeV with ATLAS detector.The first analysis is targeting the decay channel where a top squark decays to a bottom quark and a chargino, with subsequent decay of the chargino to a W-boson and a neutralino. Targeted compressed scenarios are signal models with the mass difference between the top squark and the chargino is below 20 GeV. The analysis allows to exclude the top squark masses from 125 GeV to 350 GeV at 95% CL.The second analysis is targeting the decay channel where a top squark decays to a top and a neutralino via on- or off-shell decay. Targeted compressed scenarios are signal models with small difference between the mass of the top squark and the sum of masses for the top and the neutralino. Excluded the region for top squark masses from 200 GeV to 300 GeV at 95% CL

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch
Notes
Albert-Ludwigs-Universität Freiburg, Dissertation, 2016

Classification
Physik
Keyword
CERN
LHC
ATLAS
Supersymmetrisches Teilchen
Squark
Chargino
Neutralino
Elementarteilchenphysik

Event
Veröffentlichung
(where)
Freiburg
(who)
Universität
(when)
2016
Creator
Contributor

DOI
10.6094/UNIFR/11389
URN
urn:nbn:de:bsz:25-freidok-113891
Rights
Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
25.03.2025, 1:55 PM CET

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Object type

  • Hochschulschrift

Associated

Time of origin

  • 2016

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