2009/02/28 by C. R. Das, João Pulido, Joao Pulido +1
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Borexino #Convection #Convection zone #Meteorology #Neutrino #Neutrino Physics Research #Neutrino oscillation #Particle physics #Particle physics theoretical and experimental studies #Physics #Solar core #Solar neutrino #Solar neutrino problem #Sterile neutrino #hep-ph
paper · pdf · doi:10.1103/physrevd.79.073010
published as Phys.Rev.D79:073010,2009 · Statistical analysis for Borexino performed, discussion extended, references added, 24 pages, 8 eps figures. Final version to be published in Phys.Rev.D
arxiv created 2009/04/01 · openalex publication_date 2009/04/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We generalize to three active flavors a previous two-flavor model for the resonant spin flavor conversion of solar neutrinos to sterile ones, a mechanism which is added to the well-known large mixing angle (LMA) one. The transition magnetic moments from the muon and tau neutrinos to the sterile play the dominant role in fixing the amount of active flavor suppression. We also show, through numerical integration of the evolution equations, that the data from all solar neutrino experiments except Borexino exhibit a clear preference for a sizable magnetic field either in the convection zone or in the core and radiation zone. This is possibly related to the fact that the data from the first set are average ones taken during a period of mostly intense solar activity, whereas in contrast Borexino data were taken during a period of quiet Sun. We argue that the solar neutrino experiments are capable of tracing the possible modulation of the solar magnetic field. Those monitoring the high-energy neutrinos, namely, the 8B flux, appear to be sensitive to a field modulation either in the convection zone or in the core and radiation zone. Those monitoring the low-energy fluxes will be sensitive to the second type of solar field profiles only. In this way Borexino alone may play an essential role, since it examines both energy sectors, although experimental redundancy from other experiments will be most important.