P. Astier et al., Final NOMAD results on nu(mu) -> nu(tau) and nu(e) -> nu(tau) oscillationsincluding a new search for nu(tau) appearance using hadronic tau decays, NUCL PHYS B, 611(1-3), 2001, pp. 3-39
Results from the v, appearance search in a neutrino beam using the full NOM
AD data sample are reported. A new analysis unifies all the hadronic tau de
cays, significantly improving the overall sensitivity of the experiment to
oscillations. The "blind analysis" of all topologies yields no evidence for
an oscillation signal. In the two-family oscillation scenario, this sets a
90% CL allowed region in the sin(2)2 theta (mu tau)-Deltam(2) plane which
includes sin(2)2 theta (mu tau) < 3.3 x 10(-4) at large Deltam(2) and Delta
m(2) < 0.7 eV(2)/c(4) at sin(2) 2 theta (mu tau) = 1. The corresponding con
tour in the nu (e) --> nu (tau) oscillation hypothesis results in sin(2) 2
theta (l tau) < 1.5 x 10(-2) at large Deltam(2) and Deltam(2) < 5.9 eV(2)/c
(4) at sin(2) 2 theta (l tau) = 1. We also derive limits on effective coupl
ings of the tau lepton to nu (mu) or nu (l). (C) 2001 Elsevier Science B.V.
All rights reserved.