-
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).
-
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;
-
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
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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,
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
-
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
-
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
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I. Adachi,
M. Danilov,
K Hara,
T Hara,
T Higuchi,
K. Inami,
H. Ishino,
N Katayama,
T Kawasaki, A. Kibayashi, [......],
Y Sakai,
C. Schwanda,
S Shinomiya,
K. Sumisawa,
O. Tajima,
K. Trabelsi,
T. Tsuboyama,
S Uehara,
S. Uno,
Y. Ushiroda
[show abstract]
[hide abstract]
ABSTRACT: In this note, we compile results of various simulation studies for the upgrade of the Belle detector. Based on these studies, we propose a set of optimum or appropriate parameters of the detector.
11/2008;
-
S.-W. Lin,
Y. Unno,
W.-S. Hou,
P. Chang,
I. Adachi,
H. Aihara,
K. Akai,
K. Arinstein,
V. Aulchenko,
T. Aushev, [......],
Y. Yamashita,
M. Yamauchi,
M. Yoshida,
C. Z. Yuan,
Y. Yusa,
C. C. Zhang,
Z. P. Zhang,
V. Zhilich,
V. Zhulanov,
A. Zupanc
[show abstract]
[hide abstract]
ABSTRACT: Equal amounts of matter and antimatter are predicted to have been produced in the Big Bang, but our observable Universe is clearly matter-dominated. One of the prerequisites
Nature 03/2008; 452(7185):332-335. · 36.28 Impact Factor
-
S-W Lin,
Y Unno,
W-S Hou,
P Chang,
I Adachi,
H Aihara,
K Akai,
K Arinstein,
V Aulchenko,
T Aushev, [......],
Y Yamashita,
M Yamauchi,
M Yoshida,
C Z Yuan,
Y Yusa,
C C Zhang,
Z P Zhang,
V Zhilich,
V Zhulanov,
A Zupanc
[show abstract]
[hide abstract]
ABSTRACT: Equal amounts of matter and antimatter are predicted to have been produced in the Big Bang, but our observable Universe is clearly matter-dominated. One of the prerequisites for understanding this elimination of antimatter is the nonconservation of charge-parity (CP) symmetry. So far, two types of CP violation have been observed in the neutral K meson (K(0)) and B meson (B(0)) systems: CP violation involving the mixing between K(0) and its antiparticle (and likewise for B(0) and ), and direct CP violation in the decay of each meson. The observed effects for both types of CP violation are substantially larger for the B(0) meson system. However, they are still consistent with the standard model of particle physics, which has a unique source of CP violation that is known to be too small to account for the matter-dominated Universe. Here we report that the direct CP violation in charged B(+/-)-->K(+/-)pi(0) decay is different from that in the neutral B(0) counterpart. The direct CP-violating decay rate asymmetry, (that is, the difference between the number of observed B(-)-->K(-)pi(0) event versus B(+)-->K(+) pi(0) events, normalized to the sum of these events) is measured to be about +7%, with an uncertainty that is reduced by a factor of 1.7 from a previous measurement. However, the asymmetry for versus B(0)-->K(+)pi(-) is at the -10% level. Although it is susceptible to strong interaction effects that need further clarification, this large deviation in direct CP violation between charged and neutral B meson decays could be an indication of new sources of CP violation-which would help to explain the dominance of matter in the Universe.
Nature 03/2008; 452(7185):332-5. · 36.28 Impact Factor
-
G Pakhlova,
I Adachi,
H Aihara,
K Arinstein,
V Aulchenko,
T Aushev,
A M Bakich,
V Balagura,
E Barberio,
I Bedny, [......],
A Yamaguchi,
Y Yamashita,
M Yamauchi,
C Z Yuan,
C C Zhang,
L M Zhang,
Z P Zhang,
V Zhilich,
V Zhulanov,
A Zupanc
[show abstract]
[hide abstract]
ABSTRACT: We report measurements of the exclusive cross section for e(+)e(-)-->D(0)D(-)pi(+) over the center-of-mass energy range 4.0 GeV to 5.0 GeV with initial-state radiation and the first observation of the decay psi(4415)-->D(0)D(-)pi(+). From a study of the resonant substructure in psi(4415) decay we conclude that the psi(4415)-->D(0)D(-)pi(+) decay is dominated by psi(4415)-->DD(2)(*)(2460). We obtain B(psi(4415)-->D(0)D(-)pi(nonresonant)(+))/B(psi(4415)-->DD(2)(*)(2460)-->D(0)D(-)pi(+))<0.22 at 90% C.L. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 673 fb(-1).
Physical Review Letters 02/2008; 100(6):062001. · 7.37 Impact Factor
-
M Staric,
B Golob,
K Abe,
I Adachi,
H Aihara,
K Arinstein,
T Aushev,
T Aziz,
S Bahinipati,
A M Bakich, [......],
H Yamamoto,
Y Yamashita,
M Yamauchi,
C Z Yuan,
Y Yuan,
C C Zhang,
L M Zhang,
Z P Zhang,
V Zhilich,
A Zupanc
[show abstract]
[hide abstract]
ABSTRACT: We observe evidence for D(0)-D(0) mixing by measuring the difference in the apparent lifetime when a D(0) meson decays to the CP eigenstates K(+)K(-) and pi(+)pi(-) and when it decays to the final state K(-)pi(+). We find the relative difference of the lifetimes y(CP) to be [1.31+/-0.32(stat)+/-0.25(syst)]%, 3.2 standard deviations from zero. We also search for a CP asymmetry between D(0) and D(0) decays; no evidence for CP violation is found. These results are based on 540 fb(-1) of data recorded by the Belle detector at the KEKB e(+)e(-) collider.
Physical Review Letters 06/2007; 98(21):211803. · 7.37 Impact Factor
-
H Ishino,
K Abe,
I Adachi,
H Aihara,
D Anipko,
K Arinstein,
T Aushev,
A M Bakich,
E Barberio,
M Barbero, [......],
C-H Wu,
Q L Xie,
B D Yabsley,
A Yamaguchi,
Y Yamashita,
M Yamauchi,
L M Zhang,
Z P Zhang,
V Zhilich,
A Zupanc
[show abstract]
[hide abstract]
ABSTRACT: We report a new measurement of the time-dependent CP-violating parameters in B(0)-->pi(+)pi(-) decays with 535 x 10(6) BB pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider operating at the Upsilon(4S) resonance. We find 1464+/-65 B(0)-->pi(+)pi(-) events and measure the CP-violating parameters S(pipi)=-0.61+/-0.10(stat)+/-0.04(syst) and A(pipi)=+0.55+/-0.08(stat)+/-0.05(syst). We observe large direct CP violation with a significance greater than 5 standard deviations for any S(pipi) value. Using isospin relations, we measure the Cabibbo-Kobayashi-Maskawa quark-mixing matrix angle phi(2)=(97+/-11) degrees for the solution consistent with the standard model and exclude the range 11 degrees <phi(2)<79 degrees at the 95% confidence level.
Physical Review Letters 05/2007; 98(21):211801. · 7.37 Impact Factor
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T. Ziegler,
H. Aihara,
Y. Asano,
T. Aso,
A. Bakich,
M. Barbero,
T. Browder,
M.C. Chang,
Y. Chao,
K.F. Chen, [......],
C.C. Wang,
M.Z. Wang,
M. Watanabe,
Y. Watanabe,
H. Yamamoto,
Y. Yamashita,
M. Yamauchi,
R. Yang,
Y. Yasu,
D. Zontar
[show abstract]
[hide abstract]
ABSTRACT: In autumn 2003, data taking with the new silicon vertex detector SVD2.0 in Belle started at the KEK-B energy-asymmetric e<sup>+</sup>e<sup>-</sup> collider in Tsukuba, Japan. The detector works as expected, however, it was decided to produce replacement ladders for the inner two layers of the vertex detector which are most exposed to the high radiation dose from the beam. The new ladders do not merely reproduce the existing design but include some significant improvements. The readout electronics is implemented on a hybrid board with a new heat transfer scheme in order to dissipate the heat produced in the front-end readout chip. The flex circuits that connect the double-sided silicon sensors (DSSDs) with the hybrid boards were redesigned using a 2-layer technique which improved the production quality and lowered their costs significantly. Production and testing will be finished in summer 2005 and will provide Belle with spare ladders as well as new expertise for possible future projects for example the high luminosity B-factory.
IEEE Transactions on Nuclear Science 11/2005; · 1.45 Impact Factor
