Sökning: "Higgs width"

Hittade 4 uppsatser innehållade orden Higgs width.

  1. 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 omorganisation

    Författare :Benjamin Dahlén; [2023]
    Nyckelord :Higgs; width; cross section; on-shell; off-shell; invariant mass; Standard model; upper bound; Physics and Astronomy;

    Sammanfattning : 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

  3. 2. The Higgs Width in Higgs production in association with a W+ boson

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Författare :Wijeratne Mohandiramge Umashi Navisha Fernando; [2023]
    Nyckelord :Higgs boson; Higgs width; off-shell; on-shell; narrow-width approximation; MadGraph5_MC@NLO; W boson; supersymmetry; dark matter; Physics and Astronomy;

    Sammanfattning : The width of the Higgs boson is a quantity that cannot be measured directly from the on-shell Higgs peak; it would have to be measured indirectly. In 2013, Caola and Melnikov developed a method to determine the Higgs width by using off-shell and on-shell cross-sections and applying the narrow-width approximation. LÄS MER

  4. 3. Resolving Quasi-Degenerate Higgs Bosons

    Kandidat-uppsats, Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Författare :Gustav Lindberg; [2021]
    Nyckelord :Particle physics; Higgs boson; Beyond the Standard Model; Physics and Astronomy;

    Sammanfattning : Many models beyond the Standard Model that predict the existence of multiple Higgs bosons. In general, some of these additional Higgs bosons could be quasi-degenerate in mass either to each other or to the observed 125 GeV Higgs boson. The goal of this thesis is to study under which circumstances we can resolve such Higgs bosons. LÄS MER

  5. 4. Studies of charged Higgs bosons at the Compact Linear Collider

    Master-uppsats, Högenergifysik

    Författare :Johan Relefors; [2011]
    Nyckelord :;

    Sammanfattning : The Compact Linear Collider is an electron-positron collider being developed by CERN and collaborating universities. With a center of mass energy of 3 TeV it will be used to further explore TeV scale physics after the Large Hadron Collider. LÄS MER