GALLEX solar neutrino observations: results for GALLEX IV

Hampel, W.; Heusser, G.; Kiko, J.; Kirsten, T.; Laubenstein, M.; Pernicka, Ernst; Rau, W.; Rönn, U.; Schlosser, C.; Wójcik, M.; Zakharov, Yu. I.; Ammon, R. von; Ebert, Klaus; Fritsch, Tobias; Heidt, D.; Henrich, Ε.; Stieglitz, L.; Weirich, F.; Balata, M.; Sann, M.; Hartmann, F.; Bellotti, E.; Cattadori, C.; Cremonesi, O.; Ferrari, Nicola; Fiorini, E.; Zanotti, L.; Altmann, M.; Feilitzsch, F. von; Mößbauer, R. L.; Berthomieu, G.; Schatzman, E.; Carmi, Israel; Dostrovsky, I.; Bacci, C.; Belli, P.; Bernabei, R.; d’Angelo, S.; Paoluzi, L.; Bévilacqua, A.; Cribier, M.; Gösset, L.; Rich, J.; Spiro, M.; Tao, C.; Vignaud, D.; Boger, J.; Hahn, R. L.; Rowley, J.K.; Stoenner, R.W.; Weneser, J.

doi:10.1016/s0370-2693(98)01579-2

Cited by 1,226 publications

(619 citation statements)

References 18 publications

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“…The rates are presented for the best-fit oscillation parameters of the allowed solutions listed in table 1. The total rates should be compared with the standard solar model values [8], which are, 7.6 +1.3 −1.1 (chlorine) and 128 +9 −7 (gallium), and the measured values, which are 2.56 ± 0.23 (chlorine [10]) and 72.4 ± 4.7(gallium [6,11,12]. ) SNO NC measurement is ±12% [1].…”

Section: Discussion and Summarymentioning

confidence: 99%

“…The strategies corresponding to panels (b) and (c) include the theoretical uncertainty in the 8 B neutrino flux, but differ in how they treat the total rate measured in the Super-Kamiokande experiment. The input data used in constructing figure 1 include the neutrino fluxes and uncertainties predicted by the BP00 solar model [8] and the total measured CC and NC event rates from the SNO experiment [1], the SNO day-night asymmetry [2], the Chlorine [10] and Gallium (averaged) [6,11,12,13] event rates, as well as the zenith angle-recoil energy spectrum data presented by Super-Kamiokande [14]. The rates from the GALLEX/GNO and SAGE experiments have been averaged to provide a unique data point (72.4 ± 4.7 SNU).…”

Section: Global Oscillation Solutionsmentioning

confidence: 99%

“…In the "Before" case, we use all the solar neutrino data (see refs. [9,10,11,12,13,14,15]) that were published or had appeared publicly before April 20, 2002, the date that the SNO NC and day-night asymmetry were first published. In the "After" case, we include in addition measurements reported in the two recent papers [1,2] by the Sudbury Neutrino Observatory (SNO) collaboration.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Before and After: How has the SNO NC measurement changed things?

Bahcall¹,

González-García²,

Peña-Garay³

2002

J. High Energy Phys.

126

121

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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 ∼ 99% CL. The LOW solution is allowed only at more than 2.5σ, SMA is now excluded at 3.7σ or 4.7σ depending upon analysis strategy, and pure sterile oscillations are excluded at more than 4.7σ. Small mixing angles are "out" (pure sterile is "way out"); MSW with large mixing angles is definitely "in." Vacuum oscillations are allowed at 3σ, but not at 2σ. Precise maximal mixing is excluded at 3.2σ for MSW solutions and at more than 2.8σ 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.

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Section: Discussion and Summarymentioning

confidence: 99%

Section: Global Oscillation Solutionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Before and After: How has the SNO NC measurement changed things?

Bahcall¹,

González-García²,

Peña-Garay³

2002

J. High Energy Phys.

126

121

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show abstract

“…(2.1) was used. The input data include the neutrino fluxes and uncertainties predicted by the BP00 solar model [12] and the total measured event rates from the SNO [7], Chlorine [1], and Gallium (averaged) [2,3,4] experiments, as well as the recoil electron energy spectrum measured by Super-Kamiokande [5] during the day and separately the energy spectrum measured at night. The C.L.…”

Section: Global Oscillation Solution: Three Different Analysesmentioning

confidence: 99%

“…We include all the available solar neutrino and reactor oscillation data [1,2,3,4,5,6,7]. We also present "Before and After" comparisons of the globally allowed solutions using both the previous(1998) standard value of S 17 (0),the low energy cross section factor for the production of 8 B, and a precise new measurement [8] for this important quantity.…”

Section: Introductionmentioning

confidence: 99%

Robust signatures of solar neutrino oscillation solutions

Bahcall

González-García

Peña-Garay

2002

J. High Energy Phys.

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With the goal of identifying signatures that select specific neutrino oscillation parameters, we test the robustness of global oscillation solutions that fit all the available solar and reactor experimental data. We use three global analysis strategies previously applied by different authors and also determine the sensitivity of the oscillation solutions to the critical nuclear fusion cross section, S 17 (0), for the production of 8 B. Our standard results make use of the precise new measurement of S 17 (0) by Junghans et al. The globally favored solutions are, in order of goodness of fit: LMA(the only solution at 2σ), LOW, and VAC. The NC to CC ratio for SNO is predicted by the standard global analysis to be 3.45 +0.70 −0.54 (1σ) which is separated from the no-oscillation value of 1.0 by much more than the expected experimental error. The predicted range of the day-night difference in CC rates is 8.3 +5.0 −5.6 (1σ)%. A measurement by SNO of either a NC to CC ratio > 3.3 or a day-night difference > 10%, would favor a small region of the currently allowed LMA neutrino parameter space. The global oscillation solution predicts a 7 Be neutrino-electron scattering rate in BOREXINO and KamLAND in the range 0.65 +0.04 −0.03 (1σ) of the BP00 standard solar model rate, a prediction which can be used to test both the solar model and the neutrino oscillation theory. Only the LOW solution predicts a large day-night effect(≤ 42%, 3σ) in BOREXINO and KamLAND. For the reactor KamLAND experiment, the LMA solution predicts a charged current rate relative to the standard model of 0.44 +0.22 −0.07 (1σ), E threshold = 1.22 MeV. We have also evaluated the effects of including preliminary Super-Kamiokande data for 1496 days of observations.

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Neutrino masses and particle physics beyond the standard model

Päs¹

2002

Ann. Phys.

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The evidence for non-vanishing neutrino masses from solar and atmospheric neutrinos provides the first solid hint towards physics beyond the standard model. A full reconstruction of the neutrino spectrum may well provide a key to the theoretical structures underlying the standard model such as supersymmetry, grand unification or extra space dimensions. In this article we discuss the impact of absolute neutrinos masses on physics beyond the standard model. We review the information obtained from neutrino oscillation data and discuss the prospects of the crucial determination of the absolute neutrino mass scale, as well as the intriguing connection with the Z-burst model for extreme-energy cosmic rays.

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GALLEX solar neutrino observations: results for GALLEX IV

Cited by 1,226 publications

References 18 publications

Before and After: How has the SNO NC measurement changed things?

Before and After: How has the SNO NC measurement changed things?

Robust signatures of solar neutrino oscillation solutions

Neutrino masses and particle physics beyond the standard model

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