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Recent studies have evidenced that long-baseline (LBL) experiments are sensitive to the extra CP-phases involved with light sterile neutrinos, whose existence is suggested by several anomalous short-baseline (SBL) results. We show that,…

高能物理 - 唯象学 · 物理学 2017-03-08 Francesco Capozzi , Carlo Giunti , Marco Laveder , Antonio Palazzo

The solar composition problem has puzzled astrophysicists for more than 20 years. Recent measurements of carbon-nitrogen-oxygen (CNO) neutrinos by the Borexino experiment show a $\sim2\sigma$ tension with the "low-metallicity"…

Neutrino oscillation scenarios predict correlations, and zones of avoidance, among measurable quantities such as spectral energy distortions, total fluxes, time dependences, and flavor content. The comparison of observed and predicted…

高能物理 - 唯象学 · 物理学 2009-10-31 John N. Bahcall , Plamen I. Krastev , Alexei Yu. Smirnov

The large mixing (mass)(LMA)-MSW model of solar neutrinos (nue) is now widely held to be near definitive, based on global consistency with data. No physical effect, however, compels its uniqueness. The present search for an explicitly…

天体物理学 · 物理学 2009-11-07 R. S. Raghavan

In this paper, we examine a new updated solar model taking advantage of recent reexamination of the nuclear reactions rates and of the microscopic diffusion of helium and heavy elements. Our best model fits the helioseismic data reasonably…

天体物理学 · 物理学 2008-11-26 A. S. Brun , S. Turck-Chieze , P. Morel

The excess of solar-neutrino events above 13 MeV that has been recently observed by Superkamiokande can be explained by the vacuum oscillation solution to the Solar Neutrino Problem (SNP). If the boron neutrino flux is 20% smaller than the…

高能物理 - 唯象学 · 物理学 2011-01-04 V. Berezinsky , G. Fiorentini , M. Lissia

Opportunity of the solar flares (SF's) prediction observing the solar neutrino fluxes is investigated. In three neutrino generations the evolution of the neutrino flux traveling the coupled sunspots (CS's) which are the SF source is…

太阳与恒星天体物理 · 物理学 2020-04-22 O. M. Boyarkin , I. O. Boyarkina

Using the data from SNO NCD phase, SuperK, Borexino and KamLAND Solar phase, we derive in a model independent way, bounds on the possible components in the solar neutrino flux. We update the limits on the antineutrino ($\bar\nu_x$) flux and…

高能物理 - 唯象学 · 物理学 2011-02-25 Lal Singh , Bhag C. Chauhan , Ravi Dutt , K. K. Sharma , S. Dev

We investigate the impact of the 766.3 Ty KamLAND spectrum data on the determination of the solar neutrino oscillation parameters. We show that the observed spectrum distortion in the KamLAND experiment firmly establishes $\Delta m^2_{21}$…

高能物理 - 唯象学 · 物理学 2008-11-26 Abhijit Bandyopadhyay , Sandhya Choubey , Srubabati Goswami , S. T. Petcov , D. P. Roy

Various theoretical uncertainties in the standard solar model and in the Mikheyev-Smirnov-Wolfenstein (MSW) analysis are discussed. It is shown that two methods of estimating the solar neutrino flux uncertainties are equivalent: (a) a…

高能物理 - 唯象学 · 物理学 2016-09-01 Naoya Hata , Paul Langacker

Standard solar models (SSMs) provide a reference framework across a number of research fields: solar and stellar models, solar neutrinos, particle physics the most conspicuous among them. The accuracy of the physical description of the…

太阳与恒星天体物理 · 物理学 2016-05-04 Aldo Serenelli

The Homestake result is about ~ 2 \sigma lower than the Ar-production rate, Q_{Ar}, predicted by the LMA MSW solution of the solar neutrino problem. Also there is no apparent upturn of the energy spectrum (R \equiv N_{obs}/N_{SSM}) at low…

高能物理 - 唯象学 · 物理学 2008-11-26 P. C. de Holanda , A. Yu. Smirnov

We reexamine the possibility of a time modulation of the low energy solar neutrino flux which is suggested by the average decrease of the Ga data in line with our previous arguments. We perform two separate fits to the solar neutrino data,…

高能物理 - 唯象学 · 物理学 2008-11-26 Bhag C. Chauhan , Joao Pulido , Marco Picariello

The Sudbury Neutrino Observatory (SNO) has recently completed an analysis of data from the salt phase of the experiment, in which NaCl was added to the heavy-water neutrino target to enhance sensitivity to solar neutrinos. Results from the…

高能物理 - 实验 · 物理学 2019-08-14 K. Miknaitis

We present a comparison between Monte Carlo simulations and a semi-analytical approach that reproduces the theoretical probability distribution functions of the solar neutrino fluxes, stemming from the $pp$, $pep$, $hep$, $^7\mathrm{Be}$,…

太阳与恒星天体物理 · 物理学 2018-08-29 Andreas Christ Sølvsten Jørgensen , Jørgen Christensen-Dalsgaard

It has been known for some time that the well established LMA solution to the observed solar neutrino deficit fails to predict a flat energy spectrum for SuperKamiokande as opposed to what the data indicates. It also leads to a Chlorine…

高能物理 - 唯象学 · 物理学 2011-08-31 C. R. Das , Joao Pulido

We review neutrino oscillation physics, including the determination of mass splittings and mixings from current solar, atmospheric, reactor and accelerator neutrino data. A brief discussion is given of cosmological and astrophysical…

高能物理 - 唯象学 · 物理学 2009-09-17 S. Pakvasa , J. W. F. Valle

Possibilities of a model independent treatment of the data from future real-time solar neutrino experiments (SNO, Super-Kamiokande and others) are discussed. It is shown that in the general case of transitions of the initial solar $\nu_e$'s…

高能物理 - 唯象学 · 物理学 2009-10-22 S. M. Bilenky , C. Giunti

The Sun is believed to have been the recipient of a substantial amount of metal-rich material over the course of its evolution, particularly in the early stages of the Solar System. With a long diffusion timescale, the majority of this…

天体物理学 · 物理学 2009-11-07 R. A. Winnick , Pierre Demarque , Sarbani Basu , D. B. Guenther

We investigate the prospects for non-standard interactions (NSI) in solar neutrino propagation and detection and find that these may solve the tension between the observed flatness of the SuperKamiokande electron spectrum and its LMA…

高能物理 - 唯象学 · 物理学 2011-08-17 Joao Pulido , C. R. Das