Essays about: "rare decay"

Showing result 1 - 5 of 21 essays containing the words rare decay.

  1. 1. Event categorisation and Machine-learning Techniques in Searches for Higgs Boson Pairs in the ATLAS Experiment at the LHC

    University essay from Uppsala universitet/Högenergifysik

    Author : Milads Emadi; [2023]
    Keywords : Particle Physics; ATLAS; BDT; Boosted Decision Tree; Decision Tree; Optimization; Machine Learning; Analysis;

    Abstract : This thesis investigates the pair production of Higgs bosons (di-Higgs events) at the ATLAS experiment in the Large Hadron Collider (LHC), focusing on the channel where one Higgs boson decays into two bottom quarks and the other decays into two tau leptons. The main objective was to determine whether introducing a split in the invariant mass of the decay products from the two Higgs bosons (the di-Higgs mass) and using this as an analysis variable improves the sensitivity of the Boosted Decision Tree (BDT) machine learning algorithm to the di-Higgs signal. READ MORE

  3. 2. Rare Weak Decays of the Omega Baryon

    University essay from Uppsala universitet/Kärnfysik

    Author : Cornelis Johannes Gerardus Mommers; [2022]
    Keywords : hadron; physics; nuclear; particle;

    Abstract : We study rare decays of the Omega baryon using SU(3) chiral perturbation theory, a successfuleffective field theory of quantum chromodynamics at low energies. At leading-order, we calculatethe branching fractions of the decay Ω− → Ξππ for all possible combinations of pions. READ MORE

  4. 3. Age of Peak Performance among Swedish Football Players

    University essay from Linköpings universitet/Statistik och maskininlärning

    Author : Rasmus Säfvenberg; [2022]
    Keywords : Age-performance relationship; aging curve; peak age; optimal age; football; soccer; key performance indicators;

    Abstract : Within sports, the relationship between performance and age is deeply intertwined and is of interest to various roles within the sport. Despite its status as one of the largest sports in the world, there is a limited amount of previous work in the context of football and the leagues investigated has emphasized the highest ranked leagues. READ MORE

  5. 4. Study of the doubly charged Higgs boson single production using lepton parton distribution functions with the ATLAS detector

    University essay from Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Fysiska institutionen

    Author : Daniel Magdalinski; [2022]
    Keywords : doubly charged Higgs boson; ATLAS; lepton parton distribution function; same-sign; dilepton; beyond standard model; LHC; Physics and Astronomy;

    Abstract : Searches for the doubly charged Higgs(H±±) aim to find evidence for models that could explain the origin of neutrino masses. Earlier searches at the LHC have used different production processes for the H±±, with the recent development of lepton parton distribution functions new leptonic production processes are able to be studied. READ MORE

  6. 5. Dead layer determination for the new implantation detector of the LUNDIUM decay station

    University essay from Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Author : Eleftheria Kosta; [2022]
    Keywords : Physics and Astronomy;

    Abstract : The Nuclear Structure Group in Lund, focuses on nuclear spectroscopy of decays of rare isotopes. A new decay station, called LUNDIUM, is currently being built, which will involve silicon and germanium detectors for the study of these nuclei. This thesis focuses on the characterization of one of the new silicon detectors, the implantation one. READ MORE