Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Baryon Asymmetry"”.
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The first second of leptons
… the evolution of the early Universe. The lepton asymmetry l is poorly constrained by observations and might be orders of magnitudes larger than the observed baryon asymmetry b~O(10^{-10}), |l|/b~O(10^9). We find that lepton asymmetries large compared to the tiny baryon asymmetry, can influence …
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Some Aspects of Inflationary Particle Production
… Pati-Salam and SO(10). It is shown that a baryon asymmetry in accordance with observation may result. Moreover, we consider issues of quantum theory in curved space. Scalar fields in the expanding Universe and in Rindler space are discussed. It turns out that besides the particle detection …
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The electroweak phase transition in models with gauge singlets
… phase transition is needed for generating the baryon asymmetry; and also to save it during the electroweak phase transition (EWPT). However this condition is not fulfilled within the Standard Model (SM), but in its extensions. It is widely believed that the existence of singlet scalars in some …
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CP-Violation and Baryogenesis on Electroweak Scales
… is insufficient to explain the observed value of baryon asymmetry generically.
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The HUNTER Experiment: A precision massive-neutrino search based on a laser-cooled atomic source
… universe's mysteries, including dark matter and baryon asymmetry. The hypothesis of the sterile neutrino emerged from the discovery of neutrino oscillations, where experiments observed a discrepancy between the expected and detected neutrino flux, prompting deeper investigations into the nature …
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Radiative symmetry breaking in the supersymmetric minimal B-L extended standard model
… which has the ability to explain the observed baryon asymmetry of the Universe. When we include quantum corrections to the Higgs potential of the model, we find that Radiative B-L symmetry breaking occurs through the interplay between large Majorana Yukawa couplings and SUSY breaking masses. …
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Neutrino masses and Baryogenesis via Leptogenesis in the Exceptional Supersymmetric Standard Model
… of these decays result in lepton number asymmetry in the universe. The lepton number asymmetry can be converted into baryon number asymmetry via the electroweak sphaleron process. This mechanism explains the baryon asymmetry of universe problem and is called leptogenesis. However, one …
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Hot and dark matter
… in new quasi-stable heavy states which carry the baryon asymmetry. The subsequent annihilation and late-time decay of these heavy states yields (symmetric) dark matter as well as (asymmetric) standard model baryons.
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Magnetic fields and ultracold neutron production: studies towards the neutron electric dipole moment experiment at TRIUMF
… is one of the main ingredients to create the baryon asymmetry in the universe. The current upper limit of the neutron EDM was found to be 3.0×10^(−26) e·cm, which is below the theoretical models predictions. As a result, there is a worldwide quest to find a finite nEDM. The typical …
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Measurement of strange hadron production and perspectives for the search of D0→ μ+μ− decay at LHCb
… processes involved in strange quark production. Baryon asymmetry, measured as the ⊼/Λ production ratio, is crucial to understand the mechanism with which the baryon number information of the initial state is transported to the final state. Strange baryon over meson suppression, measured as the …
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Pulse-shape studies with coplanar grid CdZnTe detectors and searches for rare nuclear decays with the COBRA experiment
… explanation of the origin of the observed baryon asymmetry in the universe through the process of leptogenisis and could shed light on the role of neutrinos in the early universe’s structure formation. For the theoretical description of the 0νββ-decay, nuclear structure effects play an …
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Search for Baryon Number Violation in Tellurium-130 with CUORE
… experimental analysis undertaken to search for baryon number violation in 130Te using the data acquired by the CUORE detector. The conservation of the baryon number in the Standard Model relies on an accidental symmetry rather than being deduced from fundamental principles. If there is evidence …