The deficit observed in the Gallium radioactive source experiments is interpreted as a possible indication of the disappearance of electron neutrinos. In the effective framework of two-neutrino mixing we obtain sin(2)2 Theta greater than or similar to 0.03 and Delta m(2)greater than or similar to 0.1 eV(2). The compatibility of this result with the data of the Bugey and Chooz reactor short-baseline antineutrino disappearance experiments is studied. It is found that the Bugey data present a hint of neutrino oscillations with 0.02 less than or similar to sin(2)2 Theta less than or similar to 0.08 and Delta m(2)approximate to 1.8 eV(2), which is compatible with the Gallium allowed region of the mixing parameters. This hint persists in the combined analyses of Bugey and Chooz data, of Gallium and Bugey data, and of Gallium, Bugey, and Chooz data.
Limits on nu(e) and (nu)overbar(e) disappearance from Gallium and reactor experiments
LAVEDER, MARCO
2008
Abstract
The deficit observed in the Gallium radioactive source experiments is interpreted as a possible indication of the disappearance of electron neutrinos. In the effective framework of two-neutrino mixing we obtain sin(2)2 Theta greater than or similar to 0.03 and Delta m(2)greater than or similar to 0.1 eV(2). The compatibility of this result with the data of the Bugey and Chooz reactor short-baseline antineutrino disappearance experiments is studied. It is found that the Bugey data present a hint of neutrino oscillations with 0.02 less than or similar to sin(2)2 Theta less than or similar to 0.08 and Delta m(2)approximate to 1.8 eV(2), which is compatible with the Gallium allowed region of the mixing parameters. This hint persists in the combined analyses of Bugey and Chooz data, of Gallium and Bugey data, and of Gallium, Bugey, and Chooz data.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.