Neutrinos and Dark Matter Within an Extended Zee-Babu Model

Schmidt, Daniel

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Neutrinos and Dark Matter Within an Extended Zee-Babu Model

Schmidt, D. (2010). Neutrinos and Dark Matter Within an Extended Zee-Babu Model. Diploma Thesis, Ruprecht-Karls-Universität, Heidelberg.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-72D5-2 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-72D6-F

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Creators:
Schmidt, Daniel¹, Author

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1Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society, ou_904549

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Abstract: Extensions of the Zee-Babu model are investigated to find a common framework for the neutrino mass problem and the dark matter issue of the universe. The particle content of the model is enlarged with a complex scalar singlet φ and a right-handed Majorana neutrino N_R which serves as a particle dark matter candidate. With a speci c baryon (B) minus lepton (L) number for φ, the model enjoys a U(1)_B-L symmetry. In a fi rst scenario, the U(1)_B-L is gauged. To prevent [U(1)_B-L³ gauge anomalies, N_R is a must. In a second scenario, a Z₄ symmetry is imposed. U(1)_B-L is global, i.e., a Majoron enters into the theory after spontaneous symmetry breaking. In both scenarios, light neutrino masses and the dark matter mass are generated at the U(1)_B-L symmetry breaking scale.The required thermal relic abundance of N_R is predominantly produced through the Higgs portal. It is shown that N_R could be directly detected. To complete, the veri cation of the model at the LHC is discussed.

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Language(s): eng - English

Dates: Accepted: 2010

Publication Status: Accepted / In Press

Pages: XVI, 98 S. : Ill., graph. Darst.

Publishing info: Heidelberg : Ruprecht-Karls-Universität

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Identifiers: eDoc: 510713

Degree: Diploma

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