Degree Type
Dissertation
Date of Award
2017
Degree Name
Doctor of Philosophy
Department
Physics and Astronomy
Major
High Energy Physics
First Advisor
Soeren Prell
Abstract
A search for pair-production of heavy leptons ($\Sigma^{0}$, $\Sigma^{\pm}$)
predicted by the Type III seesaw mechanism to explain the origin of small
neutrino masses is presented. The decay channels for the heavy leptons $\Sigma^0
\rightarrow W^{\pm}e^{\mp}$ and $\Sigma^{\pm} \rightarrow
W^{\pm}\nu_{e}$ are considered. Multivariate
techniques versus a kinematic selection method are compared. The study is
based on proton-proton collisions recorded at the ATLAS detector at the Large
Hadron Collider at CERN during 2015 with a center-of-mass energy of
$13 \tev$. The data used corresponds to an integrated luminosity of $3.2~\ifb$
and no evidence of heavy lepton pair-production was observed.
Copyright Owner
Daniel Pluth
Copyright Date
2017
Language
en
File Format
application/pdf
File Size
166 pages
Recommended Citation
Pluth, Daniel, "Search for Type III Seesaw Heavy Leptons in proton-proton collisions with the ATLAS detector at the LHC" (2017). Graduate Theses and Dissertations. 16196.
https://lib.dr.iastate.edu/etd/16196
