Directly to content
  1. Publishing |
  2. Search |
  3. Browse |
  4. Recent items rss |
  5. Open Access |
  6. Jur. Issues |
  7. DeutschClear Cookie - decide language by browser settings

phenomenology of neutrino magnetic moments

Welter, Johannes Maria René

[img]
Preview
PDF, English - main document
Download (1MB) | Terms of use

Citation of documents: Please do not cite the URL that is displayed in your browser location input, instead use the DOI, URN or the persistent URL below, as we can guarantee their long-time accessibility.

Abstract

The neutrino magnetic moment (NMM) in the Standard Model, minimally extended allowing for massive neutrinos, is many orders of magnitude below current and expected experimental sensitivities. A potential measurement would therefore strongly hint to new physics beyond the Standard Model. It raises the question how a positive NMM signal in future experiments could be explained in a theoretically consistent way. After a brief theoretical introduction, we summarize existing experimental bounds and systematically analyze the possibilities of model building for accommodating large NMMs in beyond the Standard Model frameworks. As a by-product, we derive new limits on millicharged particles from the non-observation of NMMs. The tight connection of NMMs and neutrino masses generically leads to a fine-tuning problem in typical models that predict sizable NMMs. We explicitly demonstrate this problem using a model in which NMMs are proportional to neutrino masses. Finally, we investigate mechanisms that provide large NMMs and at the same time avoid the fine-tuning problem. As a result, we find only two such mechanisms that are not yet excluded and in which large transition magnetic moments can be realized for Majorana neutrinos only.

Item Type: Dissertation
Supervisor: Lindner, Prof. Dr. Manfred
Date of thesis defense: 20 December 2017
Date Deposited: 04 Jan 2018 08:12
Date: 2017
Faculties / Institutes: The Faculty of Physics and Astronomy > Dekanat der Fakultät für Physik und Astronomie
Service facilities > Max-Planck-Institute allgemein > MPI for Nuclear Physics
Subjects: 530 Physics
About | FAQ | Contact | Imprint |
OA-LogoDINI certificate 2013Logo der Open-Archives-Initiative