We present a phenomenological analysis of a lepton flavor changing current, considering the case of interactions among leptons which change the neutrino flavor and are diagonal in the charged lepton sector. In the case of nu(e) <-- --> nu(mu) transition, we derive a bound on the vector coupling constant G(V) less-than-or-equal-to 0.16 G(F) from experimental data on nu(mu)-e scattering. For a transition nu(e) <-- --> nu(x), from (anti) nu(e)-e scattering experiments and from the analysis of advanced stellar evolutionary phases, we find G(V) less-than-or-equal-to 0.55 G(F). We discuss the compatibility of these data with a possible explanation of the solar neutrino puzzle. We also analyze how the present bounds can be improved in future long baseline neutrino experiments and atmospheric neutrino detectors.
BOUNDS ON LEPTON FLAVOR CHANGING CURRENTS AND THE SOLAR NEUTRINO PUZZLE
DEGL'INNOCENTI, SCILLA;
1993-01-01
Abstract
We present a phenomenological analysis of a lepton flavor changing current, considering the case of interactions among leptons which change the neutrino flavor and are diagonal in the charged lepton sector. In the case of nu(e) <-- --> nu(mu) transition, we derive a bound on the vector coupling constant G(V) less-than-or-equal-to 0.16 G(F) from experimental data on nu(mu)-e scattering. For a transition nu(e) <-- --> nu(x), from (anti) nu(e)-e scattering experiments and from the analysis of advanced stellar evolutionary phases, we find G(V) less-than-or-equal-to 0.55 G(F). We discuss the compatibility of these data with a possible explanation of the solar neutrino puzzle. We also analyze how the present bounds can be improved in future long baseline neutrino experiments and atmospheric neutrino detectors.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
