Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"Long-Lived Particles"”.
-
A Search for Neutral Long-Lived Particles Decaying into Displaced Jets in the ATLAS Calorimeter in Proton-Proton Collisions at the LHC
A search for neutral long-lived particles (LLPs) decaying in the ATLAS hadronic calorimeter using 140 fb^-1 of proton proton collisions at √s = 13 TeV delivered by the LHC is presented. The analysis targets pair-produced LLPs where at least one LLP is produced with sufficiently low boost that its …
-
Observation of upsilon suppression, search for long-lived particles, and observation of B0s → micro + micro-- at the LHC with the CMS experiment
… In Chapter 5, a search is performed for long-lived particles decaying to a final state that includes a pair of leptons. The experimental signature is a distinctive topology consisting of a pair of charged leptons originating from a displaced secondary vertex. Events were collected with …
-
Searching for long-lived particles Beyond the Standard Model with displaced vertex signatures using the ATLAS detector: Not all hopes for new physics die immediately
… searches assume that Beyond the Standard Model particles decay immediately after they are produced. However, there is no a priori motivation for this assumption. This thesis details part of the growing effort to use new unorthodox signatures to search for models where these particles are …
-
Searching for signs of hidden sectors at the LHC: long-lived particle methods and models
… tools that cover gaps in parameter space for new particles. Open questions ask the origins of neutrino masses, the mechanisms underlying flavour mass hierarchies, the matter-antimatter asymmetry and signs of dark matter. These questions are solved in theories of new long-lived particles (LLPs) in …
-
Phenomenology of the minimal <i>B - L</i> extension of the Standard Model at the LHC
… experimental and theoretical limits of the new particles in this model. In the gauge sector, a <i>Z'</i> boson is present. We study its properties (i.e., production cross sections, branching ratios, total width), showing that it is dominantly coupled to leptons. We also present a detailed …