tau now d.fargion d.d’armientop.oliva tau now 25' pev neutrino has been found in icecube. the...
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Tau Now
D.FargionD.D’armiento
P.OlivaTau Now 25'
PeV neutrino has been found in ICECUBE. The mixing along galactic distance guarantee the presence of PeV Tau neutrinos among astrophysical signals,
whose direct detection is subject of deep research since a decade at different UHECR experiments , mostly at EeV energies; these UHE tau neutrino while skimming the Earth (Horizontal Tau airshowers) may shower upward to the
sky. The EeV tau neutrino are a guaranteed GZK signal if UHECR are nucleons: But if they are mostly light nuclei as we advocated since 2008 , the expected photo_nuclear dissociation (GZK_He) signals is at PeVs. Therefore, kwowing
their angular distribution and rate, we propose here a novel detection signature that has not been yet considered. The signal, may be already
recorded in AUGER and TA records.
History and UHECR connections
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Tau Birth dates : the Tau Time is very running..
• Perl, M. L.;. et al. (1975). "Evidence for Anomalous Lepton Production in e+e− Annihilation".Physical Review Letters 35 (22): 1489..
• Martin Perl shared the 1995 Nobel Prize in Physics with Frederick Reines
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1995-2000: Tau Airshower
• 1994-1995 Tau Double Bang :
• Detecting Nutau Oscillations as PeV Energies• hep-ph/9405296, di JG Learned - 1994 -
• astro-ph/9906450 Horizontal Tau • air showers from mountains • in deep valley.
• Traces of UHECR neutrino tau• Daniele Fargion, Andrea Aiello, Roberto Conversano
• 26th ICRC,He 6.1.09, p.396-398.1999. • astro-ph/0002453, DF, Discovering Ultra High Energy • Neutrinos by Horizontal and Upward tau • Air-Showers: Evidences in Terrestrial Gamma Flashes?
Astrophys.J.570:909-925,2002
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The real theoretical tool
• D. F., P.G. De Sanctis Lucentini, M. De Santis. M.Grossi
• Upward Tau Air Showers from Earth
• Journal-ref: Astrophys.J. 613 (2004) 1285-1301
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Tau Upward and Horizontal
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Leptons and Neutrinos Now• https://en.wikipedia.org/wiki/Tau_(particle)
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Neutrino by Sun , SN 1987Aand CR: atmospheric neutrino..
Remember: tau mass energy threshold 4 GeVRemember: tau oscillation max across the Earth
See: Beaming Neutrino across the Earth 2012 ApJ DF
REMEMBER: SOLAR NEUTRINO FLAREGadolinium for Relic SN and Solar neutrino flare
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Pontecorvo-Maki-Nakagawa-Sakata Matrix
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The Yukawa puzzleand the neutrino mass splitting
and theirmix angle
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SK MIXING (1997-98) OFFERING to TAU a chance
The Astrophysical Journal, 570:909-925, 2002 May 10.
Discovering Ultra High Energy Neutrinos
Through Horizontal and Upward
Air Showers: Evidence inTerrestrial Gamma Flashes?D. Fargion
1,2
Received 1997 November 11;arxiv Feb 2000 accepted 2002 January 222002: Tau by AUGER Bertou;
2002 Skimming neutrino by Feng,Wilzeck..
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Tau Neutrino Astronomy• Why Tau is better? A fine tuned gift by Nature…• Neutrino electron do not leave long trace+ atmospheric• Muon is very penetrating, but unique (no-shower) + atmospheric
• Both electron and muon are mainly atmospheric• Tau , even with mixing, is not atmospheric above 100GeV
..tau track is longer and is ..overcoming muon track
and once in air it makes tau AIR-SHOWER:: A NATURAL neutrino AMPLIFIER , BOTH IN NUMBER AND IN SIZE…making easy the detection. Tau neutrino may naturally be born by muon or electron by random oscillation and mix along interstellar and galactic distances: possible byTiny neutrino mass splitting…(if neutrino mass splitting was larger or much small, or if tau was much or less heavier..no such
A tau Airshower possibility)..a miracle....a gift
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Tau EeV winning lenghts
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Updated tau Propagation lenght
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ICECUBE 4 years:_ASTROPHYSICS hope
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ICECUBE neutrino in summer: Finally an 4.5 PeV neutrino
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Atmosphere noise ruling
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ASHRA at the top in Hawaii-2005-2015PeVs Tau Cherenkov, see also Gora et all, 2015.
and DF et al 2007-8
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Tau appearence 2015
• Discovery of the TAU Neutrino appearanceThe first tau neutrino was observed in 2010. The second and third events were reported in 2012 and 2013, respectively, while the fourth one was published in 2014. The last fifth 2015By OPERA-CERN.Much interesting a Beaming neutrino acrossThe Earth for tau and anti-tau appearance test DF et all Apj 2012
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Absence of tau evidence in ICECUBE..NOW
• Search for Astrophysical Tau Neutrinos in Three Years of IceCube Data
• arXiv:1509.06212v1 - 21 Sep 2015
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Tau Bounds……..
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UHE Tau Airshower anisotropy
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Earth density profile: The Earth Shadow
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Earth Shadow
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Rock or water?
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Hadron and lepton interactions
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Energy losses
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Propagation lenght
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Area Volume effective mass
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Rates in 3 years WB
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The real rate: Ground and Fluorescence
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Angular distribution
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Glashow 6.3 PeV resonance events
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All event flux for square km
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Part of the subjectREFLECTING tau PeV airshower
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KIIA_28_SEPT_2015_Fargion 39
Cloud screen
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Up Tau Airshower
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Up going tau Cherenkov flash every three years
• Nearly or above 20 PeVs events skimming upward by tau each year in AUGER area
• Nearly 2000 or more at PeV energy muons escape upward
• Nearly or above 100 million (500 GeV) muons escape each year from AUGER upward
• No muon might shine detectable only a small TeV fraction on the clouds
Fluorescence detector may observe 30 % of cloudy days nights, at least 10% are ideal to see reflected Cherenkov flash of upward tau
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Inclined signature: splitting e, mu beams
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CORONAL crown for JEM EUSOUpward Tau at PeVs
• Euso might also observe along a wide corona the upgoing inclined PeV –tens PeV taus whose Cherenkov beamed (one-few degree) flash is comparable to ten EeV downward Cherenkov reflection for UHECR…It may..it must be observable as being a large wide (diluted) photon shower at 1000 km distances
• The signal might be a complementary search of tens EeV UHECR observable just into inner vertical cone 400 km in..peculiar geometry in action..
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Conclusions• Tau at Pevs should be seen by cherenkov flashes at horizons in
the night on clouds• The AUGER area observed by PeV a Cherenkov reflected
event on clouds is comparable with the area of a EeV fluorescence event: at least two event a year might be observed as a Tau PeV event each year (if they did recorded it they may have the AUGER signal record). TA might be able to observe one tau every two years. CTA and other array too.
• Tau might be observed by multi water tank or air telescope array in mountains or better, vulcanos, making the X-muon-radiography of mountain and the up-tau airshower search from Earth.
AUGER fluorescence telescope array, as well CTA and any telescope might inspect clouds in the nights, discovering rare upgoing airshower reflections as a first road to tau neutrino astronomy
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Thank you for the kind attention
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ref
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Mixing and MSW inside the Earth
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Cross sections (Reno et all)
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Beaming across the Earth
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KIIA_28_SEPT_2015_Fargion 52
Old limitsby AUGER2009-2011