Essays about: "composite quark model"

Found 4 essays containing the words composite quark model.

  1. 1. Reconstruction of challenging signatures characteristic to new physics beyond the Standard Model

    University essay from Uppsala universitet/Högenergifysik

    Author : Timmy Lindgren; [2020]
    Keywords : Reconstruction; Identification; photon-jets; ATLAS;

    Abstract : A study of photon-jets and their identification variables computed in the electromagnetic calorimeter of an in-house, ATLAS-like, detector model developed at Uppsala University for full-simulations is presented. The signal, which is based on the Composite Higgs Model, considers the pair production of vector-like top quarks, denoted t', with the successive decays t' to S and a Standard Model top quark and S to two photons, where S is a new pseudo-scalar boson. READ MORE

  3. 2. Exotic Decays of a Vector-liketop Partner at the LHC

    University essay from Uppsala universitet/Högenergifysik

    Author : Alexander Skwarcan-Bidakowski; [2019]
    Keywords : Particle physics; Vector-like quarks; VLQ; Composite Higgs model; CHM; Top-partner; pseudo; Nambu-Goldstone boson; pNGB; NGB; ATLAS; LHC; CMS; Significance; Recast; CheckMate; CM; MadGraph; Pythia; Delphes; Detector; Analysis; Hierarchy Problem; Exotic; Decay; QFT; Quantum Field Theory; fermions; bosons; Jets; photons; leptons; 13 TeV; Missing Transverse Energy; momentum; hypothetical; selection criteria; Standard model; Signal; background; event; Higgs; Mechanism; Simulation; Confidence limit;

    Abstract : An evaluation of how sensitive some ATLAS searches for new physics are to a new beyond standard model (BSM) vector-like quark (VLQ) and a pseudo Nambu-Goldstone boson (pNGB) scalar. This was done by simulating a signal containing these new particles and making a recast of it onto existing verified ATLAS searches for new physics at center-of-mass (CM) energy of 13 TeV (Run 2) at the Large Hadron Collider (LHC). READ MORE

  4. 3. Monte Carlo simulation study of the e+e- →Lambda Lamba-Bar reaction with the BESIII experiment

    University essay from Uppsala universitet/Kärnfysik

    Author : Niklas Forssman; [2016]
    Keywords : Hadron; Nuclear physics; Lambda; Monte Carlo-simulations; BES; BESIII; Event selection;

    Abstract : Studying the reactions where electrons and positrons collide and annihilate so that hadrons can be formed from their energy is an excellent tool when we try to improve our understanding of the standard model. Hadrons are composite quark systems held together by the strong force. READ MORE

  5. 4. Searches for Low-Mass Dijet Resonances in Trijet Final States using Monte Carlo Samples

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

    Author : Patrawan Pasuwan; [2016]
    Keywords : Dijet resonance; trijet final states; mass combination; sensitivity studies; composite quark model; simplifies dark matter mediator model; Physics and Astronomy;

    Abstract : This thesis presents the prototype of a search for new phenomena that decay in two jets, in presence of an associated jet (three-jet or trijet final state). Mass combination studies are carried out to reconstruct dijet resonances in different mass regions. READ MORE