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Last modified: 02 December 11
Paper: hep-ph/0212116
From: Joseph D. Lykken
Date: Sun, 8 Dec 2002 22:18:42 GMT (26kb)
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Title: CPT violating neutrinos in the light of KamLAND
Authors: G. Barenboim, L. Borissov, and J. Lykken
Comments: 14 pages, 4 figures
Report-no: FERMILAB-Pub-02/329-T
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The KamLAND collaboration has observed a medium baseline oscillation signal
for reactor antineutrinos. We show that a hierarchical CPT violating neutrino
spectrum can simultaneously accommodate the oscillation data from LSND,
atmospheric, solar and KamLAND, as well as the nonobservation of antineutrino
disappearance in short baseline reactor experiments. In our scenario the
KamLAND experiment is not observing an LMA solar oscillation signal. Instead
the KamLAND oscillation signal is due to an independent mass splitting in the
antineutrino spectrum. A larger antineutrino mass splitting accounts for the
LSND signal and also contributes to atmospheric oscillations.
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( http://arXiv.org/abs/hep-ph/0212116, 26kb)
Paper: hep-ph/0212126
From: Danny Marfatia
Date: Mon, 9 Dec 2002 20:30:41 GMT (36kb)
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Title: KamLAND and solar neutrino data eliminate the LOW solution
Authors: V. Barger, D. Marfatia
Comments: 6 pages, 2 figures
Report-no: MADPH-02-1315
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The KamLAND reactor antineutrino experiment has detected a 3.4\sigma flux
suppression relative to the expectation if no neutrino oscillations occur. We
combine KamLAND data with solar neutrino data and show that the LMA solution is
the only viable oscillation solution to the solar neutrino problem at the
4.4\sigma C. L.
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(http://arXiv.org/abs/hep-ph/0212126, 36kb)
Paper: hep-ph/0212127
From: Lisi Eligio
Date: Mon, 9 Dec 2002 20:35:18 GMT (242kb)
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Title: Solar neutrino oscillation parameters after first KamLAND results
Authors: G.L. Fogli, E. Lisi, A. Marrone (U. of Bari and INFN, Bari), D.
Montanino (U. of Lecce and INFN, Lecce), A. Palazzo, A.M. Rotunno (U. of Bari
& INFN, Bari)
Comments: 9 pages + 8 figures
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We analyze the energy spectrum of reactor neutrino events recently observed
in the Kamioka Liquid scintillator Anti-Neutrino Detector (KamLAND) and combine
them with solar and terrestrial neutrino data, in the context of two- and
three-family active neutrino oscillations. In the 2-neutrino case, we find that
the solution to the solar neutrino problem at large mixing angle (LMA) is
basically split into two sub-regions, that we denote as LMA-I and LMA-II. The
LMA-I solution, characterized by lower values of the squared neutrino mass gap,
is favored by the global data fit. This picture is not significantly modified
in the 3-neutrino mixing case. A brief discussion is given about the
discrimination of the LMA-I and LMA-II solutions with future KamLAND data. In
both the 2- and 3-neutrino cases, we present a detailed analysis of the
post-KamLAND bounds on the oscillation parameters.
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( http://arXiv.org/abs/hep-ph/0212127, 242kb)
Paper: hep-ph/0212129
From: Michele Maltoni
Date: Mon, 9 Dec 2002 20:53:09 GMT (32kb)
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Title: Combining first KamLAND results with solar neutrino data
Authors: M. Maltoni, T. Schwetz, J.W.F. Valle
Comments: 4 pages, LaTeX file using RevTEX4, 3 figures included
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We consider the impact of the recent KamLAND data on neutrino oscillations,
the first terrestrial neutrino experiment that can probe the solar neutrino
anomaly. By combining the first 145.1 days of KamLAND data with the full sample
of latest solar neutrino data we find an enhanced rejection against non-LMA
oscillations, allowed only with probability less than 1.4*10^-6 with respect to
LMA. Furthermore, the new data have a strong impact in narrowing down the
allowed range of Delta_m^2 inside the LMA region. In contrast, our global
analysis indicates that the new data have little impact on the location of the
best fit point. In particular the solar neutrino mixing remains significantly
non-maximal (3 sigma).
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(http://arXiv.org/abs/hep-ph/0212129, 32kb)
Paper (*cross-listing*): hep-ph/0102234
replaced with revised version Mon, 9 Dec 2002 17:27:35 GMT (301kb)
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Title: Frequentist analyses of solar neutrino data (updated including KamLAND
and SNO data)
Authors: Paolo Creminelli, Giovanni Signorelli and Alessandro Strumia
Comments: 21 pages, 10 figures. Version 2: addendum about the CC SNO data
(section 6, not present in the published version of the paper). Version 3:
addendum about the NC and day/night SNO data (section 7). Version 4: addendum
about the KamLAND data (section 8, pages 19, 20, 21)
Report-no: CERN-TH/2000-46 and IFUP-TH/2000-6 and SNS-PH/01-3
Journal-ref: JHEP 0105 (2001) 052
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( http://arXiv.org/abs/hep-ph/0102234, 301kb)