Recent Borexino results and prospects for the near future

D’Angelo, D.; Bellini, G.; Benziger, J.; Bick, D.; Bonfini, G.; Avanzini, M. Buizza; Caccianiga, B.; Cadonati, L.; Calaprice, F.; Cavalcante, P.; Chavarría, Á.; Chepurnov, A.; Davini, S.; Derbin, A.; Empl, A.; Etenko, A.; Feilitzsch, F. von; Fomenko, K.; Franco, D.; Galbiati, C.; Gazzana, S.; Ghiano, C.; Giammarchi, M.; Goeger-Neff, M.; Goretti, A.; Grandi, L.; Hagner, C.; Hungerford, E.; Ianni, Aldo; Ianni, Andrea; Kobychev, V.; Korablëv, D.; Korga, G.; Kryn, D.; Laubenstein, M.; Lehnert, B.; Lewke, T.; Litvinovich, E.; Lombardi, F.; Lombardi, P.; Ludhová, L.; Lukyanchenko, G.; Machulin, I.; Manecki, S.; Maneschg, W.; Manuzio, G.; Meindl, Q.; Meroni, E.; Miramonti, L.; Misiaszek, M.; Mosteiro, P.; Muratova, V.; Oberauer, L.; Obolensky, M.; Ortica, F.; Otis, K.; Pallavicini, M.; Papp, L.; Perasso, L.; Pocar, A.; Ranucci, G.; Razeto, A.; Re, A.; Romani, Aldo; Rossi, N.; Saldanha, R.; Salvo, C.; Schöenert, S.; Simgen, H.; Skorokhvatov, M.; Smirnov, O.; Sotnikov, A.; Suvorov, Y.; Tartaglia, R.; Testera, G.; Vignaud, D.; Vogelaar, R. B.; Winter, J.; Wójcik, Marcin; Wright, A.; Wurm, M.; Xu, J.; Zaimidoroga, O.; Zavatarelli, S.; Zuber, Κ.; Zuzel, G.

doi:10.48550/arxiv.1405.7919

Cited by 4 publications

(5 citation statements)

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“…This figure indicates that a 1 ton-year experiment could reach the best fit point of the global analysis from [50] and that a 10 ton-year Ge detector will effectively probe most of the parameter space that can explain the reactor anomaly [51]. It also shows that upcoming dark matter experiments could be competitive with the expected sensitivity of the forthcoming SOX experiment [52,53]. Therefore, the Solar neutrino measurements with a dark matter detector sensitive to both ES and CNS that we have discussed in this paper can be complementary to experiments that are planned to probe active to sterile oscillations in the Solar sector [53,54].…”

Section: Left Panel)mentioning

confidence: 84%

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Solar neutrino physics with low-threshold dark matter detectors

2015

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Dark matter detectors will soon be sensitive to Solar neutrinos via two distinct channels: coherent neutrino-nucleus and neutrino-electron elastic scatterings. We establish an analysis method for extracting Solar model properties and neutrino properties from these measurements, including the possible effects of sterile neutrinos which have been hinted at by some reactor experiments and cosmological measurements. Even including sterile neutrinos, through the coherent scattering channel, a 1 ton-year exposure with a low-threshold background free Germanium detector could improve on the current measurement of the normalization of the 8 B Solar neutrino flux down to 3% or less. Combining with the neutrino-electron elastic scattering data will provide constraints on both the high and low energy survival probability, and will improve on the uncertainty on the active-to-sterile mixing angle by a factor of two. This sensitivity to active-to-sterile transitions is competitive and complementary to forthcoming dedicated short baseline sterile neutrino searches with nuclear decays. Finally, we show that such solar neutrino physics potentials can be reached as long as the signal-to-noise ratio is better than 0.1.

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Section: Left Panel)mentioning

confidence: 84%

“…constraint and best fit point derived from a global analysis of both neutrino disappearance and appearance data [50]. The dashed grey curves are the projected limit from the SOX experiment [52,53].…”

Section: B Including Data From a Low-threshold Dark Matter Detectormentioning

confidence: 99%

Solar neutrino physics with low-threshold dark matter detectors

2015

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“…A deployment of a 144 Ce-144 Pr ANG next to the main stainless steel vessel of the Borexino detector is actually planned at the end of 2015. Such an experiment is called CeSOX [36]. The ANG would be located in the pit underneath the detector, at a distance of 8.25 m from the target center.…”

Section: Neutrino Detectors and Deployment Sitesmentioning

confidence: 99%

Experimental parameters for a Cerium 144 based intense electron antineutrino generator experiment at very short baselines

Gaffiot

Lasserre²,

Mention³

et al. 2015

Phys. Rev. D

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The standard three-neutrino oscillation paradigm, associated with small squared mass splittings ∆m 2 0.1 eV 2 , has been successfully built up over the last 15 years using solar, atmospheric, long baseline accelerator and reactor neutrino experiments. However, this well-established picture might suffer from anomalous results reported at very short baselines in some of these experiments. If not experimental artifacts, such results could possibly be interpreted as the existence of at least an additional fourth sterile neutrino species, mixing with the known active flavors with an associated mass splitting ∆m 2 new 0.01 eV 2 , and being insensitive to standard weak interactions. Precision measurements at very short baselines (5-15 m) with intense MeVνe emitters can be used to probe these anomalies. In this article, the expectedνe signal and backgrounds of a generic experiment which consists of deploying an intense β − radioactive source inside or in the vicinity of a large liquid scintillator detector are studied. The technical challenges to perform such an experiment are identified, along with quantifying the possible source and detector induced systematics, and their impact on the sensitivity to the observation of neutrino oscillations at short baselines.

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“…Because the KamLAND experiment, while very constraining of ∆m 2 12 , is not as sensitive to U e2 , the theoretical calculation of the 8 B flux currently gives the best precision on this determination. Experimentally, a combination of electron scattering and neutral current measurements are used to calibrate the flux [62,63] and the sterile neutrino component could affect this. Since the 8 B flux is theoretically known to about the 15% level currently [64], we obtain a limit of |sin θ τ | 0.6.…”

Section: Constraints From Neutrino Oscillation Experimentsmentioning

confidence: 99%

Reducing cosmological small scale structure via a large dark matter-neutrino interaction: constraints and consequences

Bertoni,

Ipek,

McKeen

et al. 2014

Preprint

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Cold dark matter explains a wide range of data on cosmological scales. However, there has been a steady accumulation of evidence for discrepancies between simulations and observations at scales smaller than galaxy clusters. Solutions to these small scale structure problems may indicate that simulations need to improve how they include feedback from baryonic matter, or may imply that dark matter properties differ from the standard cold, noninteracting scenario. One promising way to affect structure formation on small scales is a relatively strong coupling of dark matter to neutrinos. We construct an experimentally viable, simple, renormalizable, model with new interactions between neutrinos and dark matter. We show that addressing the small scale structure problems requires dark matter with a mass that is tens of MeV, and a present-day density determined by an initial particle-antiparticle asymmetry in the dark sector. Generating a sufficiently large dark matter-neutrino coupling requires a new heavy neutrino with a mass around 100 MeV. The heavy neutrino is mostly sterile but has a substantial τ neutrino component, while the three nearly massless neutrinos are partly sterile. We provide the first discussion of how such dark matter-neutrino interactions affect neutrino (especially τ neutrino) phenomenology. This model can be tested by future astrophysical, particle physics, and neutrino oscillation data. A feature in the neutrino energy spectrum and flavor content from a future nearby supernova would provide strong evidence of neutrino-dark matter interactions. Promising signatures include anomalous matter effects in neutrino oscillations due to nonstandard interactions and a component of the τ neutrino with mass around 100 MeV.

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Recent Borexino results and prospects for the near future

Cited by 4 publications

References 1 publication

Solar neutrino physics with low-threshold dark matter detectors

Solar neutrino physics with low-threshold dark matter detectors

Experimental parameters for a Cerium 144 based intense electron antineutrino generator experiment at very short baselines

Reducing cosmological small scale structure via a large dark matter-neutrino interaction: constraints and consequences

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