Fast & Curious 2benasque.org/2015tae/talks_contr/016_barenboim2.pdf · 01/10/2015 1 Fast & Curious...
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Fast & Curious 2BSModel. Original Parts.Gabriela Barenboim, TAE, September 15
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Borexino results (2012)
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Who cares ?
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10-5 eV2
1 MeV
105m = 100 km
Testing solar neutrino oscillations with reactors
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expected no-oscillation neutrino event rate at KamLAND
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Phys. Rev. Lett. 110, 161801 (2013)
two neutrino oscillations over full spectrum is"marginally compatible" with data: chi2/dof = 13.2/6.8
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Phys. Rev. Lett. 110, 161801 (2013)
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L21 30 km
L32 0.8 km
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March 8, 2012, Daya Bay (electron antineutrino disaprearance)
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What’s to be done …
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We determined that m(KL) > m(KS) by•Passing kaons through matter (regenerator)
•Beating the unknown sign[m(KL) –m(KS)] against the known sign[reg. ampl.]
We will determine the sign(m232) by
•Passing neutrinos through matter (Earth)
•Beating the unknown sign(m232) against the known
sign[forward e e Ø e e ampl]
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CP :How we are going to do it ?Accelerator experiments
Appearance experiment e
Measurement of e and e yields
Remember what happens in the quark sector !!!01/10/2015
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The off axis idea
By going off axis, the beam energy is reduced and the
spectrum becomes very sharp.
Allows an experiments to pick an energy for the
maximum oscillation length.
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Minakata and Nunokawa
What will we get ?
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On March 2011 …. ArXiv 1101.2755
New reactor antineutrino spectra have been provided for 235U, 239Pu, 241Pu, and 238U, increasing the mean flux by about 3 percent.
This reevaluation applies to all reactor neutrino experiments.
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“The Reactor Antineutrino Anomaly,” Phys. Rev. D 83: 073006, 2011
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The Gallium Anomaly
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