A future neutrino detector at megaton mass might enlarge the neutrino telescope thresholds revealing cosmic supernova background and largest solar flares (SFs) neutrinos. Indeed the solar energetic ( E-p > 100 MeV) flare particles ( protons, alpha), while scattering among themselves on solar corona atmosphere must produce prompt charged pions, whose chain decays are source of a solar ( electron - muon) neutrino 'flare' ( at tens or hundreds MeV energy). These brief ( minutes) neutrino 'bursts' at largest flare peak may overcome by three to five orders of magnitude the steady atmospheric neutrino noise on the Earth, possibly leading to their detection above detection thresholds ( in a full mixed three flavour state). Moreover the birth of anti-neutrinos at a few tens of MeV very clearly flares above a null thermal 'hep' anti-neutrino solar background and also above a tiny supernova relic and atmospheric noise. The largest prompt solar anti-neutrino 'burst' may be well detected in future Super Kamikande ( gadolinium implemented) anti-neutrino (nu) over bar (e) signatures mostly in inverse beta decay ((nu) over bar (e) + p -> n + e(+)) and rarely in higher energy muon, or even rarest tau neutrino leptons reactions. Our estimate for the recent and exceptional October - November 2003 SFs and January 20th 2005 exceptional flare might lead to a few events above or near unity for existing Super-Kamiokande and above unity for megaton detectors. The nu spectra may reflect in a subtle way the neutrino flavour oscillations and mixing in flight. A comparison of the solar neutrino flare ( at their birth place on the Sun and after oscillation on arrival on the Earth) with other neutrino foreground is estimated: it offers an independent track to disentangle the neutrino flavour puzzles and its most secret mixing angles. The sharpest noise-free anti-neutrino imprint maybe its first clean voice.

Anti-neutrino imprint in solar neutrino flare / Fargion, Daniele. - In: PHYSICA SCRIPTA. - ISSN 0031-8949. - STAMPA. - T127:(2006), pp. 22-24. (Intervento presentato al convegno 2nd Scandinavian NeutrinO Workshop tenutosi a Stockholm, SWEDEN nel MAY 02-06, 2006) [10.1088/0031-8949/2006/t127/008].

Anti-neutrino imprint in solar neutrino flare

FARGION, Daniele
2006

Abstract

A future neutrino detector at megaton mass might enlarge the neutrino telescope thresholds revealing cosmic supernova background and largest solar flares (SFs) neutrinos. Indeed the solar energetic ( E-p > 100 MeV) flare particles ( protons, alpha), while scattering among themselves on solar corona atmosphere must produce prompt charged pions, whose chain decays are source of a solar ( electron - muon) neutrino 'flare' ( at tens or hundreds MeV energy). These brief ( minutes) neutrino 'bursts' at largest flare peak may overcome by three to five orders of magnitude the steady atmospheric neutrino noise on the Earth, possibly leading to their detection above detection thresholds ( in a full mixed three flavour state). Moreover the birth of anti-neutrinos at a few tens of MeV very clearly flares above a null thermal 'hep' anti-neutrino solar background and also above a tiny supernova relic and atmospheric noise. The largest prompt solar anti-neutrino 'burst' may be well detected in future Super Kamikande ( gadolinium implemented) anti-neutrino (nu) over bar (e) signatures mostly in inverse beta decay ((nu) over bar (e) + p -> n + e(+)) and rarely in higher energy muon, or even rarest tau neutrino leptons reactions. Our estimate for the recent and exceptional October - November 2003 SFs and January 20th 2005 exceptional flare might lead to a few events above or near unity for existing Super-Kamiokande and above unity for megaton detectors. The nu spectra may reflect in a subtle way the neutrino flavour oscillations and mixing in flight. A comparison of the solar neutrino flare ( at their birth place on the Sun and after oscillation on arrival on the Earth) with other neutrino foreground is estimated: it offers an independent track to disentangle the neutrino flavour puzzles and its most secret mixing angles. The sharpest noise-free anti-neutrino imprint maybe its first clean voice.
2006
01 Pubblicazione su rivista::01a Articolo in rivista
Anti-neutrino imprint in solar neutrino flare / Fargion, Daniele. - In: PHYSICA SCRIPTA. - ISSN 0031-8949. - STAMPA. - T127:(2006), pp. 22-24. (Intervento presentato al convegno 2nd Scandinavian NeutrinO Workshop tenutosi a Stockholm, SWEDEN nel MAY 02-06, 2006) [10.1088/0031-8949/2006/t127/008].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/95793
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