What will the first year of SNO show?

Details What will the first year of SNO show? What will the first year of SNO show?

1999-11-05

arxiv.org/abs/hep-ph/9911248v3

Phys.Lett. B477 (2000) 401-409

Physics

High Energy Physics

High Energy Physics - Phenomenology

Phys Lett accepted. Editorial corrections. Related material and viewgraphs at http://www.sns.ias.edu/~jnb

Scientific paper

10.1016/S0370-2693(00)00250-1

The ratio of the measured to the predicted standard model CC event rates in SNO will be 0.47 if no oscillations occur. The best-fit active oscillation predictions for the CC ratio are: 0.35-39 (MSW) and 0.38-42 (vacuum) (all for a 5 MeV energy threshold), typically about 20% less than the no-oscillation expectation. We calculate the predicted ratios for six active and sterile neutrino oscillation solutions allowed at 99% CL and determine the dependence of the ratios on energy threshold. If the high-energy anomaly observed by SuperKamiokande is due to an enhanced hep flux, MSW active solutions predict that out of a total of 5000 CC events above 5 MeV in SNO between 49 and 54 events will be observed above 13 MeV whereas only 19 events are expected for no-oscillations and a nominal standard hep flux.

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