Sökning: "top quark mass"
Visar resultat 1 - 5 av 14 uppsatser innehållade orden top quark mass.
1. Constraining the Higgs width in Higgs production associated with a top quark pair
Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisationSammanfattning : In this thesis we study the width of the Higgs boson in the process pp → t ̄t 4l at LO using MadGraph5_aMC@NLO to generate the events. The contributions including the Higgs signal, continuum background and interference were considered in order to calculate the expected number of events in a broad range of four-lepton invariant masses. LÄS MER
2. Spin correlations in top quark pair production at the Large Hadron Collider
Kandidat-uppsats, Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisationSammanfattning : In this work we investigate the spin correlation effect of the interference between signal and irreducible background events present in top quark pair production at the LHC at LO in the dilepton channel. To simulate the high energy proton-proton collisions of the LHC, MadGraph5_aMC@NLO framework is used as an event generator. LÄS MER
3. Di-Higgs Production in the Standard Model and Beyond
Master-uppsats, Stockholms universitet/FysikumSammanfattning : This thesis examines how the kinetic properties of pair-produced Higgs bosons depend on whether the process is mediated by particles in the Standard Model or a simplified supersymmetric model. The analysis is based on simulated data made using MadGraph. LÄS MER
4. Phenomenology of Exotic Decays of Vector-Like Quark X5/3 into Doubly-Charged ScalarXinto Doubly-Charged Scalar
L3-uppsats, Uppsala universitet/HögenergifysikSammanfattning : Searches for the Vector-Like Quarks usually look for their signatures assuming they decay purely into Standard Model particles. In this paper, we explore one possible exotic decay of the Vector-Like Quark with electric charge +5/3, X5/3. LÄS MER
5. Reconstruction of challenging signatures characteristic to new physics beyond the Standard Model
Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/HögenergifysikSammanfattning : 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. LÄS MER