Precise and accurate determination of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">B</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>8</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>decay spectrum

Kirsebom, O. S.; Hyldegaard, S.; Alcorta, M.; Borge, María José García; Büscher, J.; Eronen, T.; Fox, S. P.; Fulton, Benjamin J.; Fynbo, H. O. U.; Hultgren, H.; Jokinen, A.; Jonson, B.; Kankainen, A.; Karvonen, P.; Keßler, T.; Laird, A.; Madurga, M.; Moore, I. D.; Nyman, G.; Penttilä, H.; Rahaman, S.; Reponen, M.; Riisager, K.; Roger, T.; Ronkainen, J.; Saastamoinen, A.; Tengblad, O.; Äystö, J.

doi:10.1103/physrevc.83.065802

Cited by 24 publications

(4 citation statements)

References 58 publications

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“…Moreover, the 8 Bν e experimental spectrum agrees remarkably well with the theoretical prediction for neutrinos with an energy below 12 MeV. In particular, the 8 Bν e neutrino spectra deduced from four laboratory experiments [16,[18][19][20]100] agrees within about 1% at high neutrino energies, whereas before they differed by 4% [18]. Figure 1 shows Ψ e ⊙ (E ν ), the 8 Bν e spectrum emitted by the 8 B solar reaction in the Sun's core, with Ψ e ⊕ (E ν ) and Ψ µτ ⊕ (E ν ), the two components of the 8 Bν e neutrino spectrum measured on Earth.…”

Section: B Solar Electron-neutrino Spectrum and Flavor Oscillationssupporting

confidence: 79%

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Dark matter imprint onB8neutrino spectrum

Lopes

Silk

2019

Phys. Rev. D

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The next generation of solar neutrino detectors will provide a precision measure of the 8 B electron-neutrino spectrum in the energy range from 1-15 MeV. Although the neutrino spectrum emitted by 8 B β-decay reactions in the Sun's core is identical to the neutrino spectrum measured in the laboratory, due to vacuum and matter flavor oscillations, this spectrum will be very different from that measured on Earth by the different solar neutrino experiments. We study how the presence of dark matter (DM) in the Sun's core changes the shape of the 8 B electron-neutrino spectrum. These modifications are caused by local variations of the electronic density and the 8 B neutrino source, induced by local changes of the temperature, density and chemical composition. Particularly relevant are the shape changes at low and medium energy range (E ν ≤ 10 MeV), for which the experimental noise level is expected to be quite small. If such a distortion in the 8 Bν e spectrum were to be observed, this would strongly hint in favor of the existence of DM in the Sun's core. The 8 B electron-neutrino spectrum provides a complementary method to helioseismology and total neutrino fluxes for constraining the DM properties. In particular, we study the impact of light asymmetric DM on solar neutrino spectra. Accurate neutrino spectra measurements could help to determine whether light asymmetric DM exists in the Sun's core, since it has been recently advocated that this type of DM might resolve the solar abundance problem.

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Section: B Solar Electron-neutrino Spectrum and Flavor Oscillationssupporting

confidence: 79%

“…The 8 Bν e spectrum emitted by the nuclear reactions in the Sun's core is identical to that determined by current laboratory experiments [e.g. [16][17][18][19][20]. Bahcall [21] has shown that the corrections on the shape of neutrino energy spectra caused by the surrounding plasma in the Sun's core are negligible.…”

Section: Introductionsupporting

confidence: 73%

Dark matter imprint onB8neutrino spectrum

Lopes

Silk

2019

Phys. Rev. D

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“…The main aim of this experiment was to determine precisely the neutrino spectrum from the decay of 8 B through analysis of the beta-delayed alpha spectrum. The result of this part of the experiment along with a detailed description of the experimental procedures is described in [36,37]; the set-up consisted of four DSSSD detectors each backed by a thick Si detector in close geometry around the collection point. As a byproduct the high statistics of the experiment allowed to identify for the first time an electron capture branch in the decay of 8 B, namely to the 2 + 16.922 MeV state.…”

Section: The 8 B Experimentsmentioning

confidence: 99%

Rare βp decays in light nuclei

Borge¹,

Fraile²,

Fynbo³

et al. 2013

J. Phys. G: Nucl. Part. Phys.

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Beta-delayed proton emission may occur at very low rates in the decays of the light nuclei 11 Be and 8 B. This paper explores the potential physical significance of such decays, estimates their rates and reports on first attempts to detect them: an experiment at ISOLDE/CERN gives a branching ratio for 11 Be of (2.5 ± 2.5) · 10 −6 and an experiment at JYFL a 95% confidence upper limit of 2.6 · 10 −5 for 8 B.

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“…The 8 B neutrino spectrum measured in the laboratory agrees remarkably well with its theoretical prediction for neutrinos with an energy below 12 MeV, a small difference appearing only for high energy neutrinos. The experimental 8 B neutrino spectrum deduced from four laboratory experiments shows a difference with the theoretical prediction at most of 1% [62,[65][66][67][68]. Accordingly, we will consider that the electron neutrino energy spectrum of a solar nuclear reaction at the specific location where these neutrinos are created is identical to the equivalent neutrino spectrum measured in the laboratory.…”

Section: The Solar Electron Neutrino Spectramentioning

confidence: 94%

New neutrino physics and the altered shapes of solar neutrino spectra

Lopes

2017

Phys. Rev. D

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Neutrinos coming from the Sun's core are now measured with a high precision, and fundamental neutrino oscillations parameters are determined with a good accuracy. In this work, we estimate the impact that a new neutrino physics model, the so-called generalized Mikheyev-Smirnov-Wolfenstein (MSW) oscillation mechanism, has on the shape of some of leading solar neutrino spectra, some of which will be partially tested by the next generation of solar neutrino experiments. In these calculations, we use a high-precision standard solar model in good agreement with helioseismology data. We found that the neutrino spectra of the different solar nuclear reactions of the proton-proton chains and carbon-nitrogen-oxygen cycle have quite distinct sensitivities to the new neutrino physics. The HeP and 8 B neutrino spectra are the ones for which their shapes are more affected when neutrinos interact with quarks in addition to electrons. The shape of the 15 O and 17 F neutrino spectra are also modified, although in these cases the impact is much smaller. Finally, the impact in the shape of the P P and 13 N neutrino spectra is practically negligible.

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Precise and accurate determination of theB8decay spectrum

Cited by 24 publications

References 58 publications

Dark matter imprint onB8neutrino spectrum

Dark matter imprint onB8neutrino spectrum

Rare βp decays in light nuclei

New neutrino physics and the altered shapes of solar neutrino spectra

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