Neutrino-deuterium reactions in the 7-foot bubble chamber

Recent results from the analysis of 569,000 ν pictures taken in the BNL 7-ft bubble chamber filled with D2 (and an additional 204,000 pictures in H2) are reported. The statistics of the current analysis include 648 quasi-elastic νsub(μ)d → μ-ppsub(s) events and 25 events with visible strangeness present. Using the quasielastic events in the framework of the conventional V-A theory, it is found that Msub(V) = 0.87 +- 0.09 GeV and Msub(A) = 1.03 +- 0.19 GeV. The present value is in good agreement with the CVC prediction of Msub(V) = 0.84 GeV. With the fixed value of Msub(V) = 0.84 GeV, a one parameter fit yields Msub(A) 1.08 +- 0.08 GeV. Eight events were also found in the exclusive channel νn → μ-K+Λ in agreement with a theoretical calculation using the generalised Born approximation. (author)