Sökning: "hadron jet"

Visar resultat 11 - 15 av 27 uppsatser innehållade orden hadron jet.

1. 11. Derivation of Improved K^0_L Response Uncertainty for use in the Jet Energy Scale Calibration at ATLAS

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

   Författare :Alexander Ekman; [2019]
   Nyckelord :kaon; neutral kaon; K^0_L; K_Long; klong; single-particle response; response; detector response; calorimeter; ATLAS; CERN; jets; trigger level analysis; TLA; physics list; Monte Carlo; MC; Physics and Astronomy;

   Sammanfattning : The Standard Model of particle physics (SM) attempts to describe the fundamental particles and how they interact with each other. This model is however incomplete, as shown by various experimental observations. ATLAS is one of the experiments currently in operation at the Large Hadron Collider, which aims to search for new physics beyond the SM. LÄS MER

3. 12. Characterization of the Spin of Dark Matter at the LHC

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Högenergifysik

   Författare :Tom Ingebretsen Carlson; [2019]
   Nyckelord :;

   Sammanfattning : The potential for characterizing the spin and mass of dark matter at the Large Hadron Collider (LHC) given a 5 sigma confidence level discovery has been studied. The search for dark matter is one of the big open question in particle physics as observations predict 84 percent of the matter in the universe to be dark matter, however no detection has been made. LÄS MER

4. 13. Performance of jet subtraction in pPb and PbPb collisions, without collectivity

   Kandidat-uppsats, Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

   Författare :Sebastian Grabowski; [2018]
   Nyckelord :heavy ion: scattering; Angantyr; underlying event; subtraction; jet: quenching; non-collectivity; stacking; jet: correlation; non-colliective; background; Physics and Astronomy;

   Sammanfattning : We investigated the performance of basic jet subtraction, by the utilization of jet reconstruction generally used at the Large Hadron Collider (LHC). This was done by studying Z-bosons, in the dielectron decay channel, and the associated jet correlation in pp, pPb and PbPb collisions, using datasets generated by the Monte Carlo generator PYTHIA8. LÄS MER

5. 14. Search for High-Mass Dijet Resonances Decaying into Top Quark Pairs using Machine Learning Techniques in the ATLAS Experiment

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

   Författare :Stefio Yosse Andrean; [2018]
   Nyckelord :ATLAS; LHC; jet; dijet; resonance; top; machine learning; BDT; DNN; topocluster; Physics and Astronomy;

   Sammanfattning : This thesis presents an application of machine learning techniques in a search for a high-mass resonance particle decaying into top quark pairs in high energy dijet events using the ATLAS experiment at the Large Hadron Collider. Top tagging is applied to the dijet events to select the events with top signature and suppress the background, increasing the sensitivity of the search. LÄS MER

7. 15. Studies of Dark Matter Signals at the LHC

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

   Författare :Martin Angelsmark; [2017]
   Nyckelord :Large Hadron Collider; resolution; detector; ATLAS; physics; particle; dark; matter; Martin; Angelsmark; di-jet; CERN; Physics and Astronomy;

   Sammanfattning : Standard matter, the matter that we can see, only make up about 6% of the universe. Astronomical observations have found that there exist other matter, which is non-luminous, called dark matter. This matter can interact gravitationally with standard matter, but it is unknown if it can interact weakly with the help of some other force as well. LÄS MER