-
C. Regis,
K. Abe,
Y. Hayato,
K. Iyogi,
J. Kameda,
Y. Koshio,
Ll. Marti,
M. Miura,
S. Moriyama,
M. Nakahata, [......],
M. Yokoyama,
K. Martens,
M. R. Vagins,
S. Chen,
H. Sui,
Z. Yang,
H. Zhang,
K. Connolly,
M. Dziomba,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We have searched for proton decay via p→μ+K0 using data from a 91.7 kiloton·year exposure of Super-Kamiokande- I, a 49.2 kiloton·year exposure of Super-Kamiokande II, and a 31.9 kiloton·year exposure of Super-Kamiokande III. The number of candidate events in the data was consistent with the atmospheric neutrino background expectation and no evidence for proton decay in this mode was found. We set a partial lifetime lower limit of 1.6×1033 years at the 90% confidence level.
Phys. Rev. D. 07/2012; 86(1).
-
H. Nishino,
K. Abe,
Y. Hayato,
T. Iida,
M. Ikeda,
J. Kameda,
Y. Koshio,
M. Miura,
S. Moriyama,
M. Nakahata, [......],
M. R. Vagins,
S. Chen,
Y. Heng,
J. Liu,
Z. Yang,
H. Zhang,
D. Kielczewska,
K. Connolly,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: Searches for a nucleon decay into a charged antilepton (e+ or μ+) plus a light meson (π0, π-, η, ρ0, ρ-, ω) were performed using the Super-Kamiokande I and II data. Twelve nucleon decay modes were searched for. The total exposure is 140.9 kiloton·years, which includes a 91.7 kiloton·year exposure (1489.2 live days) of Super-Kamiokande-I and a 49.2 kiloton·year exposure (798.6 live days) of Super-Kamiokande II. The number of candidate events in the data was consistent with the atmospheric neutrino background expectation. No significant evidence for a nucleon decay was observed in the data. Thus, lower limits on the nucleon partial lifetime at 90% confidence level were obtained. The limits range from 3.6×1031 to 8.2×1033 years, depending on the decay modes.
Phys. Rev. D. 06/2012; 85(11).
-
The Super-Kamiokande Collaboration: C. Regis,
K. Abe,
Y. Hayato,
K. Iyogi,
J. Kameda,
Y. Koshio,
Ll. Marti,
M. Miura,
S. Moriyama,
M. Nakahata, [......],
M. Yokoyama,
K. Martens,
M. R. Vagins,
S. Chen,
H. Sui,
Z. Yang,
H. Zhang,
K. Connolly,
M. Dziomba,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We have searched for proton into muon plus neutral kaon using data from a
91.7 kiloton-year exposure of Super-Kamiokande-I, a 49.2 kiloton-year exposure
of Super-Kamiokande-II, and a 31.9 kiloton-year exposure of
Super-Kamiokande-III. The number of candidate events in the data was consistent
with the atmospheric neutrino background expectation and no evidence for proton
decay in this mode was found. We set a partial lifetime lower limit of
1.6x10^33 years at the 90% confidence level.
05/2012;
-
Super-Kamiokande Collaboration: H. Nishino,
K. Abe,
Y. Hayato,
T. Iida,
M. Ikeda,
J. Kameda,
Y. Koshio,
M. Miura,
S. Moriyama,
M. Nakahata, [......],
M. R. Vagins,
S. Chen,
Y. Heng,
J. Liu,
Z. Yang,
H. Zhang,
D. Kielczewska,
K. Connolly,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: Searches for a nucleon decay into a charged anti-lepton (e^+ or {\mu}^+) plus
a light meson ({\pi}^0, {\pi}^-, {\eta}, {\rho}^0, {\rho}^-, {\omega}) were
performed using the Super-Kamiokande I and II data. Twelve nucleon decay modes
were searched for. The total exposure is 140.9 kiloton \cdot years, which
includes a 91.7 kiloton \cdot year exposure (1489.2 live days) of
Super-Kamiokande-I and a 49.2 kiloton \cdot year exposure (798.6 live days) of
Super-Kamiokande-II. The number of candidate events in the data was consistent
with the atmospheric neutrino background expectation. No significant evidence
for a nucleon decay was observed in the data. Thus, lower limits on the nucleon
partial lifetime at 90% confidence level were obtained. The limits range from
3.6 \times 10^31 to 8.2 \times 10^33 years, depending on the decay modes.
03/2012;
-
The Super-Kamiokande Collaboration: K. Ueno,
K. Abe,
Y. Hayato,
T. Iida,
K. Iyogi,
J. Kameda,
Y. Koshio,
Y. Kozuma,
M. Miura,
S. Moriyama, [......],
S. Chen,
Y. Heng,
Z. Yang,
H. Zhang,
D. Kielczewska,
P. Mijakowski,
K. Connolly,
M. Dziomba,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: GUT monopoles captured by the Sun's gravitation are expected to catalyze
proton decays via the Callan-Rubakov process. In this scenario, protons, which
initially decay into pions, will ultimately produce \nu_{e}, \nu_{\mu} and
\bar{\nu}_{\mu}. After undergoing neutrino oscillation, all neutrino species
appear when they arrive at the Earth, and can be detected by a 50,000 metric
ton water Cherenkov detector, Super-Kamiokande (SK). A search for low energy
neutrinos in the electron total energy range from 19 to 55 MeV was carried out
with SK and gives a monopole flux limit of F_M(\sigma_0/1 mb) < 6.3 \times
10^{-24} (\beta_M/10^{-3})^2 cm^{-2} s^{-1} sr^{-1} at 90% C.L., where \beta_M
is the monopole velocity in units of the speed of light and \sigma_0 is the
catalysis cross section at \beta_M=1. The obtained limit is more than eight
orders of magnitude more stringent than the current best cosmic-ray
supermassive monopole flux limit, F_M < 1 \times 10^{-15} cm^{-2} s^{-1}
sr^{-1} for \beta_M < 10^{-3} and also two orders of magnitude lower than the
result of the Kamiokande experiment, which used a similar detection method.
03/2012;
-
K Abe,
Y Hayato,
T Iida,
M Ikeda,
K Iyogi,
J Kameda,
Y Koshio,
Y Kozuma,
M Miura,
S Moriyama, [......],
Y Totsuka,
S Chen,
Y Heng,
Z Yang,
H Zhang,
D Kielczewska,
P Mijakowski,
K Connolly,
M Dziomba,
R J Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We present a search for differences in the oscillations of antineutrinos and neutrinos in the Super-Kamiokande-I, -II, and -III atmospheric neutrino sample. Under a two-flavor disappearance model with separate mixing parameters between neutrinos and antineutrinos, we find no evidence for a difference in oscillation parameters. Best-fit antineutrino mixing is found to be at (Δm2,sin2 2θ)=(2.0×10(-3) eV2, 1.0) and is consistent with the overall Super-K measurement.
Physical Review Letters 12/2011; 107(24):241801. · 7.37 Impact Factor
-
The Super-Kamiokande Collaboration: K. Bays,
T. Iida,
K. Abe,
Y. Hayato,
K. Iyogi,
J. Kameda,
Y. Koshio,
L. Marti,
M. Miura,
S. Moriyama, [......],
Y. Totsuka,
M. Yokoyama,
Y. Heng,
S. Chen,
H. Zhang,
Z. Yang,
P. Mijakowski,
K. Connolly,
M. Dziomba,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: A new Super-Kamiokande (SK) search for Supernova Relic Neutrinos (SRNs) was
conducted using 2853 live days of data. Sensitivity is now greatly improved
compared to the 2003 SK result, which placed a flux limit near many theoretical
predictions. This more detailed analysis includes a variety of improvements
such as increased efficiency, a lower energy threshold, and an expanded data
set. New combined upper limits on SRN flux are between 2.8 and 3.0 nu_e cm^-2
s^-1 > 16 MeV total positron energy (17.3 MeV E_nu).
11/2011;
-
T. Tanaka,
K. Abe,
Y. Hayato,
T. Iida,
J. Kameda,
Y. Koshio,
Y. Kouzuma,
M. Miura,
S. Moriyama,
M. Nakahata, [......],
Y. Heng,
Z. Yang,
H. Zhang,
D. Kielczewska,
P. Mijakowski,
K. Connolly,
M. Dziomba,
E. Thrane,
R. J. Wilkes,
and (The Super-Kamiokande Collaboration
[show abstract]
[hide abstract]
ABSTRACT: We present the result of an indirect search for high energy neutrinos from Weakly Interacting Massive Particle (WIMP) annihilation in the Sun using upward-going muon (upmu) events at Super-Kamiokande. Data sets from SKI-SKIII (3109.6 days) were used for the analysis. We looked for an excess of neutrino signal from the Sun as compared with the expected atmospheric neutrino background in three upmu categories: stopping, non-showering, and showering. No significant excess was observed. The 90% C.L. upper limits of upmu flux induced by WIMPs of 100 GeV c-2 were 6.4 × 10–15 cm–2 s–1 and 4.0 × 10–15 cm–2 s–1 for the soft and hard annihilation channels, respectively. These limits correspond to upper limits of 4.5 × 10–39 cm–2 and 2.7 × 10–40 cm–2 for spin-dependent WIMP-nucleon scattering cross sections in the soft and hard annihilation channels, respectively.
The Astrophysical Journal 11/2011; 742(2):78. · 6.02 Impact Factor
-
Super-Kamiokande Collaboration: K. Abe,
Y. Hayato,
T Iida,
K Ishihara,
J. Kameda,
Y. Koshio,
A. Minamino,
C. Mitsuda,
M Miura,
S Moriyama, [......],
Y Totsuka,
S Chen,
Z Deng,
Y Liu,
D. Kielczewska,
H. G. Berns,
K. K. Shiraishi,
E. Thrane,
K. Washburn,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: A search for neutron-antineutron (n - nbar) oscillation, a process with
|\DeltaB| = 2 that has been predicted by right-left (R-L) symmetric gauge
theories, was undertaken using the 24.5\times10^33 neutron-yrs exposure of
Super- Kamiokande I, in an analysis that included the significant sources of
experimental uncertainties. No evidence for n - nbar oscillation was found, the
lower limit of the lifetime for neutrons bound in ^16 O was determined to be
1.89 \times 10^32 yrs at the 90% confidence level (C.L.), and the corresponding
limit for the oscillation time for free neutrons was calculated to be 2.44
\times 10^8 sec using a theoretical suppression factor of 1.0 \times 10^23
sec^-1.
09/2011;
-
G. Mitsuka,
K Abe,
Y. Hayato,
T Iida,
M Ikeda,
J. Kameda,
Y. Koshio,
M Miura,
S Moriyama,
M Nakahata, [......],
Y Totsuka,
S Chen,
J Liu,
Y. Heng,
Z Yang,
H Zhang,
D. Kielczewska,
K Connolly,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: In this paper we study non-standard neutrino interactions as an example of
physics beyond the standard model using atmospheric neutrino data collected
during the Super-Kamiokande I(1996-2001) and II(2003-2005) periods. We focus on
flavor-changing-neutral-currents (FCNC), which allow neutrino flavor
transitions via neutral current interactions, and effects which violate lepton
non-universality (NU) and give rise to different neutral-current
interaction-amplitudes for different neutrino flavors. We obtain a limit on the
FCNC coupling parameter, varepsilon_{mu tau}, |varepsilon_{mu tau}|<1.1 x
10^{-2} at 90%C.L. and various constraints on other FCNC parameters as a
function of the NU coupling, varepsilon_{e e}. We find no evidence of
non-standard neutrino interactions in the Super-Kamiokande atmospheric data.
09/2011;
-
The Super-Kamiokande Collaboration: T. Tanaka,
K. Abe,
Y. Hayato,
T. Iida,
J. Kameda,
Y. Koshio,
Y. Kouzuma,
M. Miura,
S. Moriyama,
M. Nakahata, [......],
S. Chen,
Y. Heng,
Z. Yang,
H. Zhang,
D. Kielczewska,
P. Mijakowski,
K. Connolly,
M. Dziomba,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We present the result of an indirect search for high energy neutrinos from
WIMP annihilation in the Sun using upward-going muon (upmu) events at
Super-Kamiokande. Datasets from SKI-SKIII (3109.6 days) were used for the
analysis. We looked for an excess of neutrino signal from the Sun as compared
with the expected atmospheric neutrino background in three upmu categories:
stopping, non-showering, and showering. No significant excess was observed. The
90% C.L. upper limits of upward-going muon flux induced by WIMPs of 100
GeV/c$^2$ were 6.4$\times10^{-15}$ cm$^{-2}$ sec$^{-1}$ and 4.0$\times10^{-15}$
cm$^{-2}$ sec$^{-1}$ for the soft and hard annihilation channels, respectively.
These limits correspond to upper limits of 4.5$\times10^{-39}$ cm$^{-2}$ and
2.7$\times10^{-40}$ cm$^{-2}$ for spin-dependent WIMP-nucleon scattering cross
sections in the soft and hard annihilation channels, respectively.
08/2011;
-
K Abe,
N Abgrall,
Y Ajima,
H Aihara,
J B Albert,
C Andreopoulos,
B Andrieu,
S Aoki,
O Araoka,
J Argyriades, [......],
N Yershov,
M Yokoyama,
A Zalewska,
J Zalipska,
L Zambelli,
K Zaremba,
M Ziembicki,
E D Zimmerman,
M Zito,
J Żmuda
[show abstract]
[hide abstract]
ABSTRACT: The T2K experiment observes indications of ν(μ) → ν(e) appearance in data accumulated with 1.43×10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Δm(23)(2)| = 2.4×10(-3) eV(2), sin(2)2θ(23) = 1 and sin(2)2θ(13) = 0, the expected number of such events is 1.5±0.3(syst). Under this hypothesis, the probability to observe six or more candidate events is 7×10(-3), equivalent to 2.5σ significance. At 90% C.L., the data are consistent with 0.03(0.04) < sin(2)2θ(13) < 0.28(0.34) for δ(CP) = 0 and a normal (inverted) hierarchy.
Physical Review Letters 07/2011; 107(4):041801. · 7.37 Impact Factor
-
K. Abe,
Y. Hayato,
T. Iida,
M. Ikeda,
C. Ishihara,
K. Iyogi,
J. Kameda,
K. Kobayashi,
Y. Koshio,
Y. Kozuma, [......],
S. Chen,
Y. Heng,
Z. Yang,
H. Zhang,
D. Kielczewska,
P. Mijakowski,
K. Connolly,
M. Dziomba,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: The results of the third phase of the Super-Kamiokande solar neutrino
measurement are presented and compared to the first and second phase results.
With improved detector calibrations, a full detector simulation, and improved
analysis methods, the systematic uncertainty on the total neutrino flux is
estimated to be ?2.1%, which is about two thirds of the systematic uncertainty
for the first phase of Super-Kamiokande. The observed 8B solar flux in the 5.0
to 20 MeV total electron energy region is 2.32+/-0.04 (stat.)+/-0.05 (sys.)
*10^6 cm^-2sec^-1, in agreement with previous measurements. A combined
oscillation analysis is carried out using SK-I, II, and III data, and the
results are also combined with the results of other solar neutrino experiments.
The best-fit oscillation parameters are obtained to be sin^2 {\theta}12 =
0.30+0.02-0.01(tan^2 {\theta}12 = 0.42+0.04 -0.02) and {\Delta}m2_21 =
6.2+1.1-1.9 *10^-5eV^2. Combined with KamLAND results, the best-fit oscillation
parameters are found to be sin^2 {\theta}12 = 0.31+/-0.01(tan^2 {\theta}12 =
0.44+/-0.03) and {\Delta}m2_21 = 7.6?0.2*10^-5eV^2 . The 8B neutrino flux
obtained from global solar neutrino experiments is
5.3+/-0.2(stat.+sys.)*10^6cm^-2s^-1, while the 8B flux becomes
5.1+/-0.1(stat.+sys.)*10^6cm^-2s^-1 by adding KamLAND result. In a three-flavor
analysis combining all solar neutrino experiments, the upper limit of sin^2
{\theta}13 is 0.060 at 95% C.L.. After combination with KamLAND results, the
upper limit of sin^2 {\theta}13 is found to be 0.059 at 95% C.L..
10/2010;
-
R. Wendell,
C. Ishihara,
K. Abe,
Y. Hayato,
T. Iida,
M. Ikeda,
K. Iyogi,
J. Kameda,
K. Kobayashi,
Y. Koshio, [......],
S. Chen,
Y. Heng,
Z. Yang,
H. Zhang,
D. Kielczewska,
P. Mijakowski,
K. Connolly,
M. Dziomba,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We present a search for nonzero θ13 and deviations of sin2θ23 from 0.5 in the oscillations of atmospheric neutrino data from Super-Kamiokande I, II, and III. No distortions of the neutrino flux consistent with nonzero θ13 are found and both neutrino mass hierarchy hypotheses are in agreement with the data. The data are best fit at Δm2=2.1×10-3 eV2, sin2θ13=0.0, and sin2θ23=0.5. In the normal (inverted) hierarchy θ13 and Δm2 are constrained at the one-dimensional 90% C.L. to sin2θ13<0.04(0.09) and 1.9(1.7)×10-3<Δm2<2.6(2.7)×10-3 eV2. The atmospheric mixing angle is within 0.407≤sin2θ23≤0.583 at 90% C.L.
Phys. Rev. D. 05/2010; 81(9).
-
Super-Kamiokande Collaboration: R. Wendell,
C Ishihara,
K Abe,
Y. Hayato,
T Iida,
M Ikeda,
K. Iyogi,
J. Kameda,
K Kobayashi,
Y. Koshio, [......],
S Chen,
Y. Heng,
Z Yang,
H Zhang,
D. Kielczewska,
P. Mijakowski,
K Connolly,
M. Dziomba,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We present a search for non-zero theta_{13} and deviations of sin^2
theta_{23} from 0.5 in the oscillations of atmospheric neutrino data from
Super-Kamiokande -I, -II, and -III. No distortions of the neutrino flux
consistent with non-zero theta_{13} are found and both neutrino mass hierarchy
hypotheses are in agreement with the data. The data are best fit at Delta m^2 =
2.1 x 10^-3 eV^2, sin^2 theta_{13} = 0.0, and sin^2 theta_{23} =0.5. In the
normal (inverted) hierarchy theta_{13} and Delta m^2 are constrained at the
one-dimensional 90% C.L. to sin^2 theta_{13} < 0.04 (0.09) and 1.9 (1.7) x
10^-3 < Delta m^2 < 2.6 (2.7) x 10^-3 eV^2. The atmospheric mixing angle is
within 0.407 <= sin^2 theta_{23} <= 0.583 at 90% C.L.
02/2010;
-
E. Thrane,
K. Abe,
Y. Hayato,
T. Iida,
M. Ikeda,
J. Kameda,
K. Kobayashi,
Y. Koshio,
M. Miura,
S. Moriyama, [......],
G. Gong,
Y. Heng,
T. Xue,
Z. Yang,
H. Zhang,
D. Kielczewska,
P. Mijakowski,
K. Connolly,
M. Dziomba,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: It has been hypothesized that large fluxes of neutrinos may be created in astrophysical "cosmic accelerators." The primary background for a search for astrophysical neutrinos comes from atmospheric neutrinos, which do not exhibit the pointlike directional clustering that characterizes a distant astrophysical signal. We perform a search for neutrino point sources using the upward-going muon data from three phases of operation (SK-I, SK-II, and SK-III) spanning 2623 days of live time taken from 1996 April 1 to 2007 August 11. The search looks for signals from suspected galactic and extragalactic sources, transient sources, and uncataloged sources. While we find interesting signatures from two objects—RX J1713.7–3946 (97.5% CL) and GRB 991004D (95.3% CL)—these signatures lack compelling statistical significance given trial factors. We set limits on the flux and fluence of neutrino point sources above energies of 1.6 GeV.
The Astrophysical Journal 09/2009; 704(1):503. · 6.02 Impact Factor
-
M. Fechner,
K. Abe,
Y. Hayato,
T. Iida,
M. Ikeda,
J. Kameda,
K. Kobayashi,
Y. Koshio,
M. Miura,
S. Moriyama, [......],
Y. Yokosawa,
M. Koshiba,
Y. Totsuka,
S. Chen,
Y. Heng,
Z. Yang,
H. Zhang,
D. Kielczewska,
E. Thrane,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We report the development of a proton identification method for the Super-Kamiokande (SK) detector. This new tool is applied to the search for events with a single proton track, a high purity neutral current sample of interest for sterile neutrino searches. After selection using a neural network, we observe 38 events in the combined SK-I and SK-II data corresponding to 22 85.1 days of exposure, with an estimated signal-to-background ratio of 1.6 to 1. Proton identification was also applied to a direct search for charged-current quasielastic (CCQE) events, obtaining a high precision sample of fully kinematically reconstructed atmospheric neutrinos, which has not been previously reported in water Cherenkov detectors. The CCQE fraction of this sample is 55%, and its neutrino (as opposed to antineutrino) fraction is 91.7±3%. We selected 78μ-like and 47 e-like events in the SK-I and SK-II data set. With this data, a clear zenith angle distortion of the neutrino direction itself is reported in a sub-GeV sample of μ neutrinos where the lepton angular correlation to the incoming neutrino is weak. Our fit to νμ→ντ oscillations using the neutrino L/E distribution of the CCQE sample alone yields a wide acceptance region compatible with our previous results and excludes the no-oscillation hypothesis at 3-sigma.
Phys. Rev. D. 06/2009; 79(11).
-
E. Thrane,
K. Abe,
Y. Hayato,
T. Iida,
M. Ikeda,
J. Kameda,
K. Kobayashi,
Y. Koshio,
M. Miura,
S. Moriyama, [......],
Y. Heng,
T. Xue,
Z. Yang,
H. Zhang,
D. Kielczewska,
P. Mijakowski,
H. G. Berns,
K. Connolly,
M. Dziomba,
and R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We perform a search for neutrinos coincident with GRB 080319B—the brightest GRB observed to date—in a ±1000 s window. No statistically significant coincidences were observed and we thereby obtain an upper limit on the fluence of neutrino-induced muons from this source. From this we apply reasonable assumptions to derive a limit on neutrino fluence from the GRB.
The Astrophysical Journal 05/2009; 697(1):730. · 6.02 Impact Factor
-
H Nishino,
S Clark,
K Abe,
Y Hayato,
T Iida,
M Ikeda,
J Kameda,
K Kobayashi,
Y Koshio,
M Miura, [......],
Y Yokosawa,
M Koshiba,
Y Totsuka,
S Chen,
Y Heng,
Z Yang,
H Zhang,
D Kielczewska,
E Thrane,
R J Wilkes
[show abstract]
[hide abstract]
ABSTRACT: We have searched for proton decays via p-->e;{+}pi;{0} and p-->micro;{+}pi;{0} using data from a 91.7 kt.yr exposure of Super-Kamiokande-I and a 49.2 kt.yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced by atmospheric neutrinos of 0.3 events for each decay mode. From these results, we set lower limits on the partial lifetime of 8.2 x 10;{33} and 6.6 x 10;{33} years at 90% confidence level for p-->e;{+}pi;{0} and p-->micro;{+}pi;{0} modes, respectively.
Physical Review Letters 05/2009; 102(14):141801. · 7.37 Impact Factor
-
S. Fukuda,
Y. Fukuda,
M. Ishitsuka,
Y. Itow,
T. Kajita,
J. Kameda,
K. Kaneyuki,
K. Kobayashi,
Y. Koshio,
M. Miura, [......],
M. Koshiba,
Y. Ichikawa,
K. Nishijima,
H. Fujiyasu,
H. Ishino,
M. Morii,
Y. Watanabe,
D. Kielczewska,
A. L. Stachyra,
R. J. Wilkes
[show abstract]
[hide abstract]
ABSTRACT: Using the Super-Kamiokande neutrino observatory, a search was conducted for neutrinos produced in coincidence with gamma-ray bursts observed by the Burst and Transient Source Experiment detector. Super-Kamiokande data in the neutrino energy range of 7 MeV ~ 100 TeV were analyzed. For gamma-ray bursts that occurred between 1996 April and 2000 May, no statistically significant signal in excess of the background levels was detected. Implied upper limits on associated gamma-ray burst neutrino production are presented.
The Astrophysical Journal 12/2008; 578(1):317. · 6.02 Impact Factor
