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Limits on the non-standard interactions of neutrinos from e+e− colliders

2002; Elsevier BV; Volume: 535; Issue: 1-4 Linguagem: Inglês

10.1016/s0370-2693(02)01767-7

1873-2445

Zurab Berezhiani, Anna Maria Rossi,

Dark Matter and Cosmic Phenomena

We provide an effective Lagrangian analysis of contact non-standard interactions of neutrinos with electrons, which can be effectively mediated by extra particles, and examine the associated experimental limits. At present, such interactions are strongly constrained only for $\nu_\mu$: the bounds are loose for $\nu_e$ and absent for $\nu_\tau$. We emphasize the unique role played by the reaction $e^+e^-\to \nu \bar{\nu}\gamma$ in providing direct constraints on such non-standard interactions.