-
K. Nobuta,
M. Akiyama,
Y. Ueda,
M. G. Watson,
J. Silverman,
K. Hiroi,
K. Ohta,
F. Iwamuro,
K. Yabe, N. Tamura, [......],
H. Lee,
E. Curtis Lake,
E. Macaulay,
F. Clarke,
K. Sekiguchi,
C. Simpson,
S. Croom,
M. Ouchi,
H. Hanami,
T. Yamada
[show abstract]
[hide abstract]
ABSTRACT: In order to investigate the growth of super-massive black holes (SMBHs), we
construct the black hole mass function (BHMF) and Eddington ratio distribution
function (ERDF) of X-ray-selected broad-line AGNs at z~1.4 in the Subaru
XMM-Newton Deep Survey field. In this redshift range, a significant part of the
accretion growth of SMBHs is thought to be taking place. Black hole masses of
X-ray-selected broad-line AGNs are estimated using the width of the broad MgII
line and the 3000A monochromatic luminosity. We supplement the MgII FWHM values
with the Ha FWHM obtained from our NIR spectroscopic survey. Using the black
hole masses of broad-line AGNs at redshifts between 1.18 and 1.68, the binned
broad-line AGN BHMF and ERDF are calculated using the Vmax method. To properly
account for selection effects that impact the binned estimates, we derive the
corrected broad-line AGN BHMF and ERDF by applying the Maximum Likelihood
method, assuming that the ERDF is constant regardless of the black hole mass.
We do not correct for the non-negligible uncertainties in virial BH mass
estimates. If we compare the corrected broad-line AGN BHMF with that in the
local Universe, the corrected BHMF at z~1.4 has a higher number density above
10^8 Msolar but a lower number density below that mass range. The evolution may
be indicative of a down-sizing trend of accretion activity among the SMBH
population. The evolution of broad-line AGN ERDF from z=1.4 to 0 indicates that
the fraction of broad-line AGNs with accretion rate close to the
Eddington-limit is higher at higher redshifts.
10/2012;
-
I. G. Roseboom,
A. Bunker,
M. Sumiyoshi,
L. Wang,
G. Dalton,
M. Akiyama,
J. Bock,
D. Bonfield,
V. Buat,
C. Casey, [......],
S. J. Oliver,
M. J. Page,
B. Schulz,
Douglas Scott,
M. Symeonidis,
N. Takato, N. Tamura,
T. Totani,
K. Yabe,
M. Zemcov
[show abstract]
[hide abstract]
ABSTRACT: We investigate the properties (e.g. star formation rate, dust attentuation,
stellar mass and metallicity) of a sample of infrared luminous galaxies at z
\sim 1 via near-IR spectroscopy with Subaru-FMOS. Our sample consists of
Herschel SPIRE and Spitzer MIPS selected sources in the COSMOS field with
photometric redshifts in the range 0.7 < z-phot < 1.8, which have been targeted
in 2 pointings (0.5 sq. deg.) with FMOS. We find a modest success rate for
emission line detections, with candidate H{\alpha} emission lines detected for
57 of 168 SPIRE sources (34 per cent). By stacking the near-IR spectra we
directly measure the mean Balmer decrement for the H{\alpha} and H{\beta}
lines, finding a value of <E(B-V)> = 0.51\pm0.27 for = 10^12 Lsol sources
at = 1.36. By comparing star formation rates estimated from the IR and from
the dust uncorrected H{\alpha} line we find a strong relationship between dust
attenuation and star formation rate. This relation is broadly consistent with
that previously seen in star-forming galaxies at z ~ 0.1. Finally, we
investigate the metallicity via the N2 ratio, finding that z ~ 1 IR-selected
sources are indistinguishable from the local mass-metallicity relation. We also
find a strong correlation between dust attentuation and metallicity, with the
most metal-rich IR-sources experiencing the largest levels of dust attenuation.
07/2012;
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M. Onodera,
A. Renzini,
M. Carollo,
M. Cappellari,
C. Mancini,
V. Strazzullo,
E. Daddi,
N. Arimoto,
R. Gobat,
Y. Yamada, [......],
M. Giavalisco,
A. M. Koekemoer,
X. Kong,
S. Lilly,
K. Motohara,
K. Ohta,
D. B. Sanders,
N. Scoville, N. Tamura,
Y. Taniguchi
[show abstract]
[hide abstract]
ABSTRACT: [Abridged] We present the results of new near-IR spectroscopic observations
of passive galaxies at z>1.4 in a concentration of BzK-selected galaxies in the
COSMOS field. The observations have been conducted with Subaru/MOIRCS, and have
resulted in absorption lines and/or continuum detection for 18 out of 34
objects. This allows us to measure spectroscopic redshifts for a sample almost
complete to K(AB)=21. COSMOS photometric redshifts are found in fair agreement
overall with the spectroscopic redshifts, with a standard deviation of ~0.05;
however, ~30% of objects have photometric redshifts systematically
underestimated by up to ~25%. We show that these systematic offsets in
photometric redshifts can be removed by using these objects as a training set.
All galaxies fall in four distinct redshift spikes at z=1.43, 1.53, 1.67 and
1.82, with this latter one including 7 galaxies. SED fits to broad-band fluxes
indicate stellar masses in the range of ~4-40x10^10Msun and that star formation
was quenched ~1 Gyr before the cosmic epoch at which they are observed. The
spectra of several individual galaxies have allowed us to measure their
Hdelta_F and Dn4000 indices, which confirms their identification as passive
galaxies, as does a composite spectrum resulting from the coaddition of 17
individual spectra. The effective radii of the galaxies have been measured on
the HST/ACS F814W image, confirming the coexistence at these redshifts of
passive galaxies which are substantially more compact than their local
counterparts with others that follow the local size-stellar mass relation. For
the galaxy with best S/N spectrum we were able to measure a velocity dispersion
of 270+/-105 km/s, indicating that this galaxy lies closely on the virial
relation given its stellar mass and effective radius.
06/2012;
-
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).
-
Y Abe,
C Aberle,
T Akiri,
J C dos Anjos,
F Ardellier,
A F Barbosa,
A Baxter,
M Bergevin,
A Bernstein,
T J C Bezerra, [......],
H Watanabe,
B White,
C Wiebusch,
L Winslow,
M Worcester,
M Wurm,
E Yanovitch,
F Yermia,
K Zbiri,
V Zimmer
[show abstract]
[hide abstract]
ABSTRACT: The Double Chooz experiment presents an indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. An observed-to-predicted ratio of events of 0.944±0.016(stat)±0.040(syst) was obtained in 101 days of running at the Chooz nuclear power plant in France, with two 4.25 GW(th) reactors. The results were obtained from a single 10 m(3) fiducial volume detector located 1050 m from the two reactor cores. The reactor antineutrino flux prediction used the Bugey4 flux measurement after correction for differences in core composition. The deficit can be interpreted as an indication of a nonzero value of the still unmeasured neutrino mixing parameter sin(2)2θ(13). Analyzing both the rate of the prompt positrons and their energy spectrum, we find sin(2)2θ(13)=0.086±0.041(stat)±0.030(syst), or, at 90% C.L., 0.017<sin(2)2θ(13)<0.16.
Physical Review Letters 03/2012; 108(13):131801. · 7.37 Impact Factor
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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;
-
[show abstract]
[hide abstract]
ABSTRACT: OBJECT: The focus of the present study was the evaluation of outcomes after unstaged and staged-volume Gamma Knife surgery (GKS) in children harboring intracranial arteriovenous malformations (AVMs). METHODS: Twenty-two children (median age 9.5 years) underwent GKS for AVMs and were followed up for at least 2 years thereafter. The disease manifested with intracranial hemorrhage in 77% of cases. In 68% of patients the lesion affected eloquent brain structures. The volume of the nidus ranged from 0.1 to 6.7 cm(3). Gamma Knife surgery was guided mainly by data from dynamic contrast-enhanced CT scans, with preferential targeting of the junction between the nidus and draining vein. The total prescribed isodose volume was kept below 4.0 cm(3), and the median margin dose was 22 Gy (range 20-25 Gy). If the volume of the nidus was larger than 4.0 cm(3), a second radiosurgical session was planned for 3-4 years after the first one. Nine patients in the present series underwent unstaged radiosurgery, whereas staged-volume treatment was scheduled in 13 patients. RESULTS: Complete obliteration of the AVM was noted in 17 (77%) of 22 patients within a median period of 47 months after the last radiosurgical session. Complete obliteration of the lesion occurred in 89% of patients after unstaged treatment and in 62.5% after staged GKS. Four (67%) of 6 high-grade AVMs were completely obliterated. Complications included 3 bleeding episodes, the appearance of a region of hyperintensity on T(2)-weighted MR images in 2 patients who had no symptoms, and reappearance of the nidus in the vicinity of the completely obliterated AVM in 1 patient. CONCLUSIONS: Radiosurgery is a highly effective management option for intracranial AVMs in children. For larger lesions, staged GKS may be applied successfully. Initial targeting of the nidus adjacent to the draining vein and application of a sufficient radiation dose to a relatively small volume (</= 4 cm(3)) provides a good balance between a high probability of obliteration and a low risk of treatment-related complications.
J Neurosurg. 01/2012; 117 Suppl:150-7.
-
Y. Abe,
C. Aberle,
T. Akiri,
J. C. dos Anjos,
F. Ardellier,
A. F. Barbosa,
A. Baxter,
M. Bergevin,
A. Bernstein,
T. J. C. Bezerra, [......],
H. Watanabe,
B. White,
C. Wiebusch,
L. Winslow,
M. Worcester,
M. Wurm,
E. Yanovitch,
F. Yermia,
K. Zbiri,
V. Zimmer
[show abstract]
[hide abstract]
ABSTRACT: The Double Chooz Experiment presents an indication of reactor electron
antineutrino disappearance consistent with neutrino oscillations. A ratio of
0.944 $\pm$ 0.016 (stat) $\pm$ 0.040 (syst) observed to predicted events was
obtained in 101 days of running at the Chooz Nuclear Power Plant in France,
with two 4.25 GW$_{th}$ reactors. The results were obtained from a single 10
m$^3$ fiducial volume detector located 1050 m from the two reactor cores. The
reactor antineutrino flux prediction used the Bugey4 measurement as an anchor
point. The deficit can be interpreted as an indication of a non-zero value of
the still unmeasured neutrino mixing parameter \sang. Analyzing both the rate
of the prompt positrons and their energy spectrum we find \sang = 0.086 $\pm$
0.041 (stat) $\pm$ 0.030 (syst), or, at 90% CL, 0.015 $<$ \sang $\ <$ 0.16.
12/2011;
-
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
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[show abstract]
[hide abstract]
ABSTRACT: Radiosurgical management of large cystic metastatic brain tumors represents a significant challenge. Nevertheless, modified dose planning has shown beneficial results in such cases.
"Donut's shape" radiosurgical treatment planning is based on the chain-like application of multiple, small-sized isocenters for selective coverage of the contrast-enhancing tumor capsule and minimal irradiation of the central cystic area. Such an approach was used for the management of large cystic intracranial metastases, which were not accompanied by a significant mass effect and did not require immediate volume reduction. Treatment was done using Leksell Gamma Knife model C with automatic positioning system. The majority of treated lesions showed significant shrinkage after radiosurgery and no major complications were met.
Large cystic metastatic brain tumors may be successfully treated with gamma knife radiosurgery alone using the proposed "donut's shape" dose planning with coverage of the contrast-enhancing tumor capsule by multiple small-sized isocenters.
min - Minimally Invasive Neurosurgery 10/2011; 54(5-6):286-9. · 0.70 Impact Factor
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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;
-
H Furuta,
Y Fukuda,
T Hara,
T. Haruna,
N Ishihara,
M. Ishitsuka,
C. Ito,
M Katsumata,
T Kawasaki,
T Konno, [......],
T Matsubara,
H Miyata,
Y. Nagasaka,
K Nitta,
Y Sakamoto,
F Suekane,
T. Sumiyoshi,
H Tabata,
M. Takamatsu, N Tamura
[show abstract]
[hide abstract]
ABSTRACT: We carried out a study of neutrino detection at the experimental fast reactor
JOYO using a 0.76 tons gadolinium loaded liquid scintillator detector. The
detector was set up on the ground level at 24.3m from the JOYO reactor core of
140MW thermal power. The measured neutrino event rate from reactor on-off
comparison was 1.11\pm1.24(stat.)\pm0.46(syst.)events/day. Although the
statistical significance of the measurement was not enough, the background in
such a compact detector at the ground level was studied in detail and MC
simulation was found to describe the data well. A study for improvement of the
detector for future such experiments is also shown.
08/2011;
-
K. Nagaoka,
K. Ida,
M. Yoshinuma,
Y. Takeiri,
M. Yokoyama,
S. Morita,
K. Tanaka,
T. Ido,
A. Shimizu, N. Tamura, [......],
H. Takahashi,
C. Suzuki,
Y. Suzuki,
K. Ikeda,
M. Osakabe,
K. Tsumori,
H. Nakano,
O. Kaneko,
H. Yamada,
LHD Experiment Group
[show abstract]
[hide abstract]
ABSTRACT: The peaked ion-temperature profile with steep gradient, the so-called ion internal transport barrier (ion ITB), was formed in the neutral beam heated plasmas on the Large Helical Device and the high-ion-temperature regime of helical plasmas has been significantly extended. The ion thermal diffusivity in the ion ITB plasma decreases down to the neoclassical transport level. The heavy ion beam probe observed the smooth potential profile with negative radial electric field (ion root) in the core region where the ion thermal diffusivity decreases significantly. The large toroidal rotation was also observed in the ion ITB core and the transport of toroidal momentum was analysed qualitatively. The decrease in momentum diffusivity with ion temperature increase was observed in the ion ITB core. The toroidal rotation driven by ion-temperature gradient, the so-called intrinsic rotation, is also identified.
Nuclear Fusion 07/2011; 51(8):083022. · 4.09 Impact Factor
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[show abstract]
[hide abstract]
ABSTRACT: Ni3Sn4 grains were formed on Ni by reactive wetting between molten eutectic SnPb and thermally annealed Ni foil. Using synchrotron white beam micro x-ray diffraction analysis, two kinds of preferred orientation relationships between Ni3Sn4 and Ni were found. The existence of preferred orientation with large interfacial misfit is suggested as a general mechanism of intermetallic compound formation in reactive solder wetting on metals.
Journal of Applied Physics 06/2011; 109(12):123513-123513-5. · 2.17 Impact Factor
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T Matsubara,
T. Haruna,
T Konno,
Y Endo,
M. Bongrand,
H Furuta,
T Hara,
M. Ishitsuka,
T Kawasaki,
M Kuze, [......],
Y Miyamoto,
H Miyata,
Y. Nagasaka,
Y Sakamoto,
F Sato,
A. Shigemori,
F Suekane,
T. Sumiyoshi,
H Tabata, N Tamura
[show abstract]
[hide abstract]
ABSTRACT: The goal of Double Chooz experiment is a precise measurement of the last
unknown mixing angle theta_13 using two identical detectors placed at far and
near sites from Chooz reactor cores. The detector is optimized for
reactor-neutrino detection using specially developed 10-inch PMTs. We developed
two types of measurement systems and evaluated 400 PMTs before the
installation. Those PMTs fulfill our requirements, and a half of those have
been installed to the far detector in 2009. The character and performance data
of the PMTs are stored in a database and will be referenced in analysis and MC
simulation.
04/2011;
-
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;
-
N. Tamura,
K. Ida,
S. Inagaki,
K. Tanaka,
T. Tokuzawa,
K. Itoh,
T. Shimozuma,
S. Kubo,
H. Tsuchiya,
Y. Nagayama,
K. Kawahata,
S. Sudo,
H. Yamada,
LHD Experiment Group
[show abstract]
[hide abstract]
ABSTRACT: A comparison of characteristics between a nonlocal transport phenomenon and an electron internal transport barrier (ITB) in the Large Helical Device is performed with a transient transport analysis and from the viewpoint of a dynamic behavior of transport state. The electron ITB is characterized by a jump of electron temperature gradient. In contrast, the transient transport analysis indicates the nonlocal transport phenomenon is characterized by a jump of electron heat flux. And seen from the viewpoint of the dynamic behavior of transport state, the physical mechanism of the appearance of the nonlocal transport phenomenon is found to be qualitatively different from that of the formation of the electron ITB (© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Beiträge aus der Plasmaphysik 07/2010; 50(6‐7):514 - 519.
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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
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[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).
