A New Fit to Solar Neutrino Data in Models with Large Extra Dimensions
نویسندگان
چکیده
String inspired models with millimeter scale extra dimensions provide a natural way to understand an ultralight sterile neutrino needed for a simultaneous explanation of the solar, atmospheric and LSND neutrino oscillation results. The sterile neutrino is the bulk neutrino (νB) postulated to exist in these models, and it becomes ultralight in theories that prevent the appearance of its direct mass terms. Its Kaluza-Klein (KK) states then add new oscillation channels for the electron neutrino emitted from the solar core. We show that successive MSW transitions of solar νe to the lower lying KK modes of νB in conjunction with vacuum oscillations between the νe and the zero mode of νB provide a new way to fit the solar neutrino data. The characteristic predictions can be tested by SNO and forthcoming solar neutrino experiments. We discuss both intermediate and low string scale models where the desired spectrum can emerge naturally.
منابع مشابه
Large extra dimensions, sterile neutrinos and solar neutrino data.
Solar, atmospheric, and LSND neutrino oscillation results require a light sterile neutrino, nu(B), which can exist in the bulk of extra dimensions. Solar nu(e), confined to the brane, can oscillate in the vacuum to the zero mode of nu(B) and via successive Mikheyev-Smirnov-Wolfenstein transitions to Kaluza-Klein states of nu(B). This new way to fit solar data is provided by both low and interme...
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