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Publikováno v:
Phys.Rev. D74 (2006) 033013
It is shown that one can in principle constrain the CP-violating parameter delta from measurements of four independant |V_{ij}|^2, or three of them and a ratio, in the leptonic sector. To quantify our approach, using unitarity, we derive simple expre
Externí odkaz:
http://arxiv.org/abs/hep-ph/0605066
Autor:
Balaji, K. R. S., Garbrecht, Bjorn
Publikováno v:
Phys.Lett. B638 (2006) 320-324
Single field baryogenesis, a scenario for Dirac leptogenesis sourced by a time-dependent scalar condensate, is studied. We compare the creation of the charge asymmetry by the perturbative decay of the condensate with the nonperturbative decay, a proc
Externí odkaz:
http://arxiv.org/abs/hep-ph/0603230
Publikováno v:
Phys.Rev.D72:056005,2005
In a recent publication, we suggested a mechanism for obtaining dynamical CP violation in the early Universe based on the out-of-equilibrium evolution of complex scalar fields. In this paper, we suggest several ways of transferring the CP asymmetry f
Externí odkaz:
http://arxiv.org/abs/hep-ph/0506013
Autor:
Balaji, K. R. S., Maalampi, Jukka
Ultra high energy cosmic ray (UHECR) neutrino fluxes measured in a fixed target detector can have a scale dependence. In the usual standard model or any extensions of this model (which are renormalizable), the effect is observationally very small. Ho
Externí odkaz:
http://arxiv.org/abs/hep-ph/0502192
In the context of inflationary cosmology, we discuss a minimal baryogenesis scenario in which the resulting baryon to entropy ratio is determined by the amplitude of the anisotropies of the cosmic microwave background. The model involves a new $SU(2)
Externí odkaz:
http://arxiv.org/abs/hep-ph/0412197
Publikováno v:
Phys.Rev.Lett. 94 (2005) 031301
We propose a new variant of the Affleck-Dine baryogenesis mechanism in which a rolling scalar field couples directly to left- and right-handed neutrinos, generating a Dirac mass term through neutrino Yukawa interactions. In this setup, there are no e
Externí odkaz:
http://arxiv.org/abs/hep-ph/0407090
Publikováno v:
Phys.Lett.B595:22-27,2004
Following earlier ideas of Dolgov, we show that the asymmetrical dynamical evolution of fields in the early Universe provides a new source for CP violation. This can lead to baryogenesis without any additional CP-violating interactions. The magnitude
Externí odkaz:
http://arxiv.org/abs/hep-ph/0403014
Publikováno v:
Phys.Rev. C69 (2004) 055804
Neutrino emission drives neutron star cooling for the first several hundreds of years after its birth. Given the low energy ($\sim$ keV) nature of this process, one expects very few nonstandard particle physics contributions which could affect this r
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402315
Autor:
Balaji, K. R. S.
We present a simple observation for neutrino mixings and masses which arises naturally in dimensional deconstruction models. There are two essential ingredients of such models: (i) the presence of a symmetry mediated by the link fields which results
Externí odkaz:
http://arxiv.org/abs/hep-ph/0312215