Searching for new physics in future neutrino factory experiments
Abstract
An extension of the new standard model, by introducing a mixing of the low mass “active” neutrinos with heavy ones, or by any model with lepton flavor violation, is considered. This leads to nonorthogonal neutrino production and detection states and to modifications of neutrino oscillations in both vacuum and matter. The possibility of the discovery of such effects in current and future neutrino oscillation experiments is discussed. First order approximation formulas for the flavor transition probabilities in constant density matter, for all experimentally available channels, are given. Numerical calculations of flavor transition probabilities for two sets of new physics parameters describing a single “effective” heavy neutrino state, both satisfying present experimental constraints, have been performed. Two energy ranges and several baselines, assuming both the current (±2σ) and the expected future errors (±3%) of the neutrino oscillation parameters are considered, keeping their present central values. It appears that the biggest potential of the discovery of the possible presence of any new physics is pronounced in oscillation channels in which ν_{e} and ν_{ē} are not involved at all, especially for two baselines, L=3000 km and L=7500 km, which for other reasons are also called “magic” for future Neutrino Factory experiments.
 Publication:

European Physical Journal C
 Pub Date:
 December 2007
 DOI:
 10.1140/epjc/s1005200704206
 arXiv:
 arXiv:0706.1442
 Bibcode:
 2007EPJC...52..905H
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 15 pages, 2 figures