Tag: Higgs

Free Download An Introduction To Gauge-higgs Unification: Extra Dimensions In Particle Physics
English | 2025 | ISBN: 9819800978 | 278 Pages | PDF (True) | 8 MB
What is the Higgs boson? How are all forces unified in particle physics? What is a mechanism for gauge symmetry breaking? Are there extra dimensions in spacetime?The Higgs boson discovered in 2012 is a crucial piece in the standard model for unifying electromagnetic and weak forces. Gauge symmetry is spontaneously broken by the Higgs mechanism. There is an alternative scenario. In the Hosotani mechanism gauge symmetry is spontaneously broken by dynamics of gauge fields in the fifth dimension. The Higgs boson appears as a fluctuation mode of an Aharonov-Bohm phase in the fifth dimension. This leads to the scenario of gauge-Higgs unification.In this book gauge-Higgs unification is introduced from the basics and is applied to electroweak unification. It is seen that gauge-Higgs unification gives nearly the same phenomenology at low energies as the standard model, and leads to many predictions to be confirmed in future experiments.

Free Download Search for Invisible Decays of the Higgs Boson Produced via Vector Boson Fusion at the LHC with CMS Run 2 data
English | 2024 | ISBN: 3031783646 | 145 Pages | PDF EPUB (True) | 49 MB
This thesis reports the latest measurements on one of the leading dark matter searches conducted by the Compact Muon Solenoid (CMS) experiment at CERN, leading to some of the most stringent constraints on hypothesized interactions between the Higgs boson and dark matter. The thesis also includes further research about the future outlook of the experiment, including exploratory research on the adaptation of deep learning models in future dark matter analyses to improve analysis sensitivity, and the design of a new type of data processing hardware to be used in the next phase of the CMS experiment.

Free Download Der Higgs-Mechanismus: Entwicklung einer Fortbildung für Lehrkräfte inklusive Handreichung
Deutsch | 2024 | ISBN: 3658464860 | 109 Pages | PDF (True) | 1.2 MB
Im Juli 2012 prägte ein besonderes Thema aus der Physik die Medienlandschaft. Das letzte unbekannte Elementarteilchen des sogenannten Standardmodells der Teilchenphysik, das Higgs-Boson, konnte am Large Hadron Collider (LHC) am CERN in der Schweiz erstmals nachgewiesen werden. Es bleibt jedoch die Frage offen, um was es sich beim zugrunde liegenden Higgs-Mechanismus und beim Higgs-Teilchen an sich eigentlich handelt. Selbst Lehrkräfte des Faches Physik stoßen bei diesem Thema an ihre Grenzen. Ziel dieses Werks ist die Erarbeitung einer Fortbildung für Lehrkräfte des Faches Physik. Dazu wird der Higgs-Mechanismus in Form einer wissenschaftlichen Aufarbeitung Schritt für Schritt, unterstützt von ausgewählten Werken, aufgearbeitet.

Free Download The Beauty and the Boost: A Higgs Boson Tale:
Measurements of Higgs Boson Production at High Energy in Decays to Bottom Quarks
English | 2023 | ISBN: 3031394410 | 407 Pages | EPUB (True) | 58 MB

Free Download The Beauty and the Boost: A Higgs Boson Tale: Measurements of Higgs Boson Production at High Energy in Decays to Bottom Quarks and Their Interpretations with the ATLAS Experiment at the LHC by Brian Moser
English | PDF (True) | 2023 | 250 Pages | ISBN : 3031394410 | 7.1 MB
Precision measurements of the Higgs boson’s properties are a powerful tool to look for deviations from the predictions of the Standard Model (SM) of particle physics. The 139/fb of proton-proton collision data which have been collected by the ATLAS experiment during Run 2 of the LHC, offer an opportunity to investigate rare Higgs-boson topologies, which are particularly sensitive to new physics scenarios but experimentally difficult to access. Several such measurements, which target Higgs-boson decays to heavy-flavour quarks, as well as their combinations are presented in this thesis. A novel analysis that measures Higgs-boson production in association with a heavy vector boson V (VH, with V=W,Z) at high energies is presented. Dedicated Higgs-boson reconstruction techniques are applied to reconstruct the highly Lorentz-boosted Higgs-boson decays into pairs of bottom quarks. The measurement is subsequently combined with a VH cross-section measurement at low and intermediate pT(V) to provide a differential cross-section measurement in kinematic fiducial volumes over the largest possible pT(V) range. All cross-section measurements agree with the SM predictions within relative uncertainties that range from 30% to 300%. The results are furthermore interpreted as limits on the parameters of a SM effective field theory. Finally, a combination of measurements of Higgs decays to heavy-flavour quarks is used to experimentally determine that the Higgs-boson coupling to charm quarks is weaker than to bottom quarks, as predicted by the SM. The target audience for the thesis are physicists and physics students, in particular those with a background in high energy physics.