Sökning: "muons"

Visar resultat 16 - 20 av 21 uppsatser innehållade ordet muons.

1. 16. Optimization of a search for doubly-charged Higgs bosons in same-sign di-muon final states at a center of mass energy of 8 TeV with the ATLAS detector.

   Master-uppsats, Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Fysiska institutionen

   Författare :Leonora Vesterbacka Olsson; [2015]
   Nyckelord :Same-sign di-leptons; Beyond Standard Model; Doubly-charged Higgs boson; ATLAS; Physics and Astronomy;

   Sammanfattning : In this thesis an optimization of a previously performed inclusive search for beyond Standard Model Physics in same-sign di-lepton final states is performed, but tuned for a doubly-charged Higgs boson decaying to same-sign di-muons. The doubly-charged Higgs boson is a proposed fundamental particle whose existence would provide evidence for theoretical extensions of the Standard Model (SM) of particle physics. LÄS MER

3. 17. Search for same-sign dilepton signatures with the ATLAS detector

   Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Partikel- och kärnfysik

   Författare :Inga Rún Helgadóttir; [2014]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : This thesis presents the work I did for the inclusive search for anomalous production of same charge lepton-pairs, originating from the collision point, at sqrt(s) = 8 TeV with the ATLAS detector at the LHC using the 2012 data. I optimized the selection criteria for isolated electrons and muons, calculated the so-called "fake factors" and "fake factor" systematic uncertainties for the muon selection. LÄS MER

4. 18. Studies of a neutral Higgs boson produced in gluon-gluon fusion and vector boson fusion

   Kandidat-uppsats, Uppsala universitet/Högenergifysik

   Författare :Max Isacson; [2014]
   Nyckelord :neutral; higgs; boson; high energy physics; hep; atlas; lhc; simulation; gluon fusion; vector boson fusion; mechanism;

   Sammanfattning : This paper presents an outline of the generation of mass for the massive Standard Model particles (fermions, $W^\pm$, $Z^0$) through electroweak symmetry breaking via the Higgs mechanism, and how the Higgs boson emerges from this framework. A Monte Carlo study was done on the decay $H\rightarrow\tau\tau$, with one leptonically and one hadronically decaying tau, with two different production channels for the $H$, gluon-gluon fusion (gg) and vector boson fusion (VBF), at $\sqrt s = 7\tev$ with a Higgs mass $m_H = 120\gev$. LÄS MER

5. 19. A Search for Indications of Majorana Neutrinos in Same-sign Dimuon Events at the ATLAS Detector

   Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Partikel- och kärnfysik

   Författare :Simon Arnling Bååth; [2014]
   Nyckelord :Majorana Neutrino; ATLAS; Dimuon; Neutrino; LRSM; Physics and Astronomy;

   Sammanfattning : Abstract The current Standard Model cannot explain many properties of the neutrino, including its mass. Models exist where a postulated heavy Majorana neutrino will give rise to the observed small neutrino mass currently observed. LÄS MER

7. 20. The Mass of the Higgs Boson

   Kandidat-uppsats, Lunds universitet/Fysiska institutionen

   Författare :Alexander Burgman; [2013]
   Nyckelord :atlas; cern; high energy; thesis; physics; higgs; particle; muon; partikelfysik; boson; bachelors; bachelor s; kandidat; bachelor; alexander; burgman; Physics and Astronomy;

   Sammanfattning : Abstract Within the Standard Model of particle physics, there was only one undiscovered fundamental particle. This was the Higgs boson. In July 2012, the announcement was made that a Higgs like particle had been discovered by the ATLAS Collaboration and the CMS Collaboration at CERN. LÄS MER