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Before and after: how has the SNO neutral current measurement changed things?

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Before and after: how has the SNO neutral current measurement changed things?

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dc.contributor.author Bahcall, John N.
dc.contributor.author González García, Mª Concepción
dc.contributor.author Peña Garay, Carlos
dc.date.accessioned 2014-11-03T12:50:10Z
dc.date.available 2014-11-03T12:50:10Z
dc.date.issued 2002
dc.identifier.citation Bahcall, John N. González García, Mª Concepción Peña Garay, Carlos 2002 Before and after: how has the SNO neutral current measurement changed things? Journal of High Energy Physics 02 7 054
dc.identifier.uri http://hdl.handle.net/10550/39547
dc.description.abstract We present Before and After global oscillation solutions, as well as predicted Before and After values and ranges for ten future solar neutrino observables (for BOREXINO, KamLAND, SNO, and a generic p-p neutrino detector). The 'Before' case includes all solar neutrino data (and some theoretical improvements) available prior to April 20, 2002 and the After case includes, in addition, the new SNO data on the CC, NC, and day-night asymmetry. We have performed global analyses using the full SNO day-night energy spectrum and, alternatively, using just the SNO NC and CC rates and the day-night asymmetry. The LMA solution is the only currently allowed MSW oscillation solution at similar to99% CL. The LOW solution is allowed only at more than 2.5sigma, SMA is now excluded at 3.7sigma or 4.7sigma depending upon analysis strategy, and pure sterile oscillations are excluded at more than 4.7sigma. Small mixing angles are out (pure sterile is 'way out'); MSW with large mixing angles is definitely 'in'. Vacuum oscillations are allowed at 3sigma, but not at 2sigma. Precise maximal mixing is excluded at 3.2sigma for MSW solutions and at more than 2.8sigma for vacuum solutions. Most of the predicted values for future observables for the BOREXINO, KamLAND, and future SNO measurements are changed only by minor amounts by the inclusion of the recent SNO data. In order to test the robustness of the allowed neutrino oscillation regions that are inferred from the measurements and the predicted values for future solar neutrino observables, we have carried out calculations using a variety of strategies for analyzing the SNO and other experimental data.
dc.language.iso eng
dc.relation.ispartof Journal of High Energy Physics, 2002, vol. 02, num. 7, p. 054
dc.subject Física
dc.title Before and after: how has the SNO neutral current measurement changed things?
dc.type journal article es_ES
dc.date.updated 2014-11-03T12:50:10Z
dc.identifier.doi 10.1088/1126-6708/2002/07/054
dc.identifier.idgrec 097457
dc.rights.accessRights open access es_ES

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