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Exotic Decays of a Vector-liketop Partner at the LHC
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
2019 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

An evaluation of how sensitive some ATLAS searches for new physics are to a new beyond standard model (BSM) vector-like quark (VLQ) and a pseudo Nambu-Goldstone boson (pNGB) scalar. This was done by simulating a signal containing these new particles and making a recast of it onto existing verified ATLAS searches for new physics at center-of-mass (CM) energy of 13 TeV (Run 2) at the Large Hadron Collider (LHC). Signals for recasting were tailored such that their final states would be appropriate in relation to each respective ATLAS search in order to use the same selection criteria as applied in the existing searches. The results are summarized in the form of significances (Z) for each masspoint of the new top-partner and S particle. Significances did not show any expectiation of excluding any masspoint in the examined mass range for the recasts at 95% CL. This suggests that a dedicated search for these particles in the considered masspoints would be required.

Place, publisher, year, edition, pages
2019. , p. 44
Series
UPTEC F, ISSN 1401-5757 ; 19038
Keywords [en]
Particle physics, Vector-like quarks, VLQ, Composite Higgs model, CHM, Top-partner, pseudo, Nambu-Goldstone boson, pNGB, NGB, ATLAS, LHC, CMS, Significance, Recast, CheckMate, CM, MadGraph, Pythia, Delphes, Detector, Analysis, Hierarchy Problem, Exotic, Decay, QFT, Quantum Field Theory, fermions, bosons, Jets, photons, leptons, 13 TeV, Missing Transverse Energy, momentum, hypothetical, selection criteria, Standard model, Signal, background, event, Higgs, Mechanism, Simulation, Confidence limit
National Category
Other Physics Topics Accelerator Physics and Instrumentation Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-392988OAI: oai:DiVA.org:uu-392988DiVA, id: diva2:1350880
Educational program
Master Programme in Engineering Physics
Supervisors
Examiners
Available from: 2019-09-13 Created: 2019-09-12 Last updated: 2019-09-13Bibliographically approved

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High Energy Physics
Other Physics TopicsAccelerator Physics and InstrumentationSubatomic Physics

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • ieee
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Language
  • de-DE
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  • nn-NB
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  • Other locale
More languages
Output format
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