Neutrino Masses and Interactions in a Model with Nambu-Goldstone Bosons
نویسنده
چکیده
A natural scenario for the generation of neutrino masses is the see-saw mechanism, in which a large right-handed neutrino mass makes the left-handed neutrinos light. We review a special case when the Majorana masses originate from spontaneous breaking of a global U(1)XU(1) symmetry. The interactions of the right-handed with the left-handed neutrinos at the electorweak scale further break the global symmetry giving mass to one pseudo Nambu-Goldstone boson (pNGB). The pNGB can then generate a long-range force. Leptogenesis occurs through decays of heavy neutrinos into the light ones and Higgs particles. The pNGB can become the acceleron field and the neutrino masses vary with the value of the scalar field1. 1 Invited Talk presented at the Second International Conference on High Energy Physics (CICHEP II), January 1417,2006; Cairo, Egypt. The talk is a brief preview of the results in reference [11].
منابع مشابه
Electroweak and Majorana Sector Higgs Bosons and Pseudo-Nambu-Goldstone Bosons
We propose a Clifford algebra based model, which treats both gravity and YangMills interactions as gauge fields. There are two sectors of boson fields as electroweak and Majorana bosons. The electroweak boson sector induces fermion masses via spontaneous symmetry breaking. It is composed of scalar Higgs, pseudoscalar Higgs, and antisymmetric tensor components. The Majorana boson sector contribu...
متن کاملNeutrino Phenomenology, Dark Energy and Leptogenesis from pseudo-Nambu-Goldstone Bosons
We consider a model of dynamical neutrino masses via the see-saw mechanism. Nambu-Goldstone bosons (majorons) arise associated with the formation of the heavy right-handed majorana masses. These bosons then acquire naturally soft masses (become pNGB’s) at loop level via the Higgs-Yukawa mass terms. These models, like the original neutrino pNGB quintessence schemes of the 1980’s [1, 2] that proc...
متن کاملNeutrino Masses, Lepton Flavor Violations, and Flavor Changing Neutral Currents in Composite Little Higgs Model
Little higgs theories attribute light higgs to being one of a set of pseudo Nambu Goldstone bosons. This implies that the UV cutoff of the little higgs models should be around 10 TeV, and a new physics resides above the UV cutoff. The composite little higgs model, a candidate for UV physics of the littlest higgs model, incorporates supersymmetry into strong gauge dynamics. We find that this con...
متن کاملNeutrino Dark Energy and Baryon Asymmetry from Higgs Sector
We propose a new model to explain the neutrino masses, the dark energy and the baryon asymmetry altogether. In this model, neutrinos naturally acquire small Majorana masses via type-II seesaw mechanism, while the pseudo-Nambu-Goldstone bosons associated with the neutrino massgeneration mechanism provide attractive candidates for dark energy. The baryon asymmetry of the universe is produced from...
متن کاملCosmology with ultralight pseudo Nambu-Goldstone bosons.
We explore the cosmological implications of an ultra-light pseudo-Nambu-Goldstone boson. With global spontaneous symmetry breaking scale f ' 10 18 GeV and explicit breaking scale comparable to MSW neutrino masses, M 10 3 eV, such a eld, which acquires a mass m M 2 =f H 0 , would have become dynamical at recent epochs and currently dominate the energy density of the universe. The eld acts as an ...
متن کامل