2020 Impact factor 4.590
Particles and Fields
Eur. Phys. J. C 18, 405-416
DOI 10.1007/s100520000519

Searches for the appearance of $\nu_\tau$
using neutrino beams from muon storage rings

S. Dutta1,2 - R. Gandhi1 - B. Mukhopadhyaya1

1 Mehta Research Institute, Jhusi, Allahabad, India
2 S.G.T.B. Khalsa College, University of Delhi, Delhi, India

Received: 4 April 2000 / Revised version: 22 July 2000 /
Published online: 8 December 2000 - © Springer-Verlag 2000

We study the possibilities offered by muon storage rings for $\nu_\tau$ appearance experiments in order to determine masses and mixing angles for the $\nu_\mu
\rightarrow \nu_\tau$ and $\bar\nu_e
\rightarrow \bar\nu_\tau$ oscillations. The dependence of tau event rates on baseline, forward peaking of decay neutrinos with increasing energies, and average fluxes intercepted by detectors of various sizes is discussed. It is found that the baseline length does not significantly affect the rates for oscillations of such magnitudes as are suggested by the current atmospheric neutrino data. Subsequently, the effects of cuts on hadronic and wrong sign leptonic modes are computed and used to plot $90\%$ CL contours for the parameter regions that can be explored in such experiments. The results show that even for modest muon beam energies, convincing coverage and verification of the Super Kamiokande parameters is possible. In addition, a very significant enlargement of present day bounds on the mixing parameters for neutrino oscillations of all types is guaranteed by these types of searches.

Copyright Società Italiana di Fisica, Springer-Verlag 2000