Implications of the GALLEX determination of the solar neutrino flux

Anselmann, P.; Hampel, W.; Heusser, G.; Kiko, J.; Kirsten, T.; Pernicka, Ernst; Plaga, R.; Rönn, U.; Sann, M.; Schlosser, C.; Wink, R.; Wójcik, M.; Ammon, R. von; Ebert, Klaus; Henrich, Ε.; Balata, M.; Bellotti, E.; Ferrari, Nicola; Lalla, H.; Stolarczyk, Th.; Cattadori, C.; Cremonesi, O.; Fiorini, E.; Pezzoni, S.; Zanotti, L.; Feilitzsch, F. von; Mößbauer, R. L.; Schanda, Ulrich; Berthomieu, G.; Schatzman, E.; Carmi, Israel; Dostrovsky, I.; Bacci, C.; Belli, P.; Bernabei, R.; d’Angelo, S.; Paoluzi, L.; Charbit, S.; Cribier, M.; Dupont, Graham; Gösset, L.; Rich, J.; Spiro, M.; Tao, C.; Vignaud, D.; Hahn, R. L.; Hartmann, F.; Rowley, J.K.; Stoenner, R.W.; Weneser, J.

doi:10.1016/0370-2693(92)91522-b

Cited by 188 publications

(69 citation statements)

References 29 publications

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“…Observations of ν-e scattering at the planned BOREXINO detector [22], in the electron recoil energy band 0.26 < T e < 0.66 MeV, will be very sensitive to this 7 Be line contribution. A distinctive feature of LWO scenarios, however, is that they contain clean and potentially resolvable oscillations in the ν e survival probability P (ν e → ν e ) = 1 − sin The Sudbury Neutrino Observatory (SNO) experiment [24] cannot detect 7 Be neutrinos and will therefore have little time dependence, but will be able to test a second distinctive property of LWO, namely an oscillatory modulation of the 8 B neutrino spectrum. This property follows immediately from the expression for P (ν e → ν e ), that oscillates versus E ν when measured at (approximately) constant L. SNO will obtain a determination of the high-energy 8 B neutrino spectrum through its measurement of charged-current ν e d → ppe − scattering.…”

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confidence: 99%

“…A first discussion, presented by the GALLEX group itself [7] and amplified by others [8,9], argues that an explanation in terms of non-standard solar models is still at least conceivable, although not particularly promising. They also show that explanations in terms of matter-enhanced neutrino oscillations (the MSW effect [10]) are possible, for two distinct regions in the (sin 2 2θ, δm 2 ) parameter plane.…”

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confidence: 99%

“…The LWO predictions for future experiments are particularly sensitive to line sources in the solar neutrino spectrum, such as the 862 keV 7 Be line (that generates most of the wiggles in the 71 Ga contours in Fig. 1).…”

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confidence: 99%

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Long-wavelength oscillations and the new gallium solar neutrino signals

1992

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The recently reported solar neutrino signal in the 71 Ga GALLEX detector adds a new dimension to the solar neutrino puzzle, complementing the previously known signals in 37 Cl and water-Cherenkov detectors. Possible explanations for this new signal in terms of matter-enhanced neutrino oscillations (MSW effect) are already awaiting in the literature. We point out here that long-wavelength vacuum oscillations can furnish an alternative explanation of all three signals simultaneously; such solutions give neutrino spectra with distinctive energy dependence and seasonal time dependence.

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confidence: 99%

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confidence: 99%

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Long-wavelength oscillations and the new gallium solar neutrino signals

1992

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“…which is pictorially shown in figure 2(a). 1 Here, u R , d R , l R represent the right-handed up-type quarks, down-type quarks and charged leptons, while L L and H the left-handed lepton and Higgs SU(2) L doublets withH ≡ iσ 2 H, respectively. In such a kind of models with sizable couplings only to the first two generations of quarks, the neutrino-antineutrino oscillation probabilities can be large enough so that such phenomena might be observed with the usual (anti)neutrino sources in the foreseeable future.…”

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confidence: 99%

Large ν ‐ ν ¯ $$ \nu \hbox{-} \overline{\nu} $$ oscillations from high-dimensional lepton number violating operator

Geng

Huang

2017

J. High Energ. Phys.

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It is usually believed that the observation of the neutrino-antineutrino (ν-ν) oscillations is almost impossible since the oscillation probabilities are expected to be greatly suppressed by the square of tiny ratio of neutrino masses to energies. Such an argument is applicable to most models for neutrino mass generation based on the Weinberg operator, including the seesaw models. However, in the present paper, we shall give a counterexample to this argument, and show that large ν-ν oscillation probabilities can be obtained in a class of models in which both neutrino masses and neutrinoless double beta (0νββ) decays are induced by the high-dimensional lepton number violating operator O 7 =ū R l c RL L H * d R + H.c. with u and d representing the first two generations of quarks. In particular, we find that the predicted 0νββ decay rates have already placed interesting constraints on the ν e ↔ν e oscillation. Moreover, we provide an UV-complete model to realize this scenario, in which a dark matter candidate naturally appears due to the new U(1) d symmetry.

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“…The presence of the tiny neutrino masses and mixings between different neutrino flavors have been established by many neutrino oscillation experiments [1][2][3][4][5][6][7], while more and more evidences are accumulated for the existence of dark matter (DM) over the last several decades, with the most precise measurement of its relic abundance by PLANCK [8,9]. Both phenomena cannot be explained within the Standard Model (SM), thus providing us with two windows towards new physics beyond it.…”

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confidence: 99%

Connecting neutrino masses and dark matter by high-dimensional lepton number violation operator

Geng

Huang

Tsai

et al. 2015

J. High Energ. Phys.

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Abstract:We propose a new model with the Majorana neutrino masses generated at two-loop level, in which the lepton number violation (LNV) processes, such as neutrinoless double beta decays, are mainly induced by the dimension-7 LNV effective operatorNote that it is necessary to impose an Z 2 symmetry in order that O 7 dominates over the conventional dimension-5 Weinberg operator, which naturally results in a stable Z 2 -odd neutral particle to be the cold dark matter candidate. More interestingly, due to the non-trivial dependence of the charged lepton masses, the model predicts the neutrino mass matrix to be in the form of the normal hierarchy. We also focus on a specific parameter region of great phenomenological interests, such as electroweak precision tests, dark matter direct searches along with its relic abundance, and lepton flavor violation processes.

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Implications of the GALLEX determination of the solar neutrino flux

Cited by 188 publications

References 29 publications

Long-wavelength oscillations and the new gallium solar neutrino signals

Long-wavelength oscillations and the new gallium solar neutrino signals

Large ν ‐ ν ¯ $$ \nu \hbox{-} \overline{\nu} $$ oscillations from high-dimensional lepton number violating operator

Connecting neutrino masses and dark matter by high-dimensional lepton number violation operator

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