1,809 results on '"Kawahara, H"'
Search Results
2. Measurements of protons and charged pions emitted from $\nu_{\mu}$ charged-current interactions on iron at a mean neutrino energy of 1.49$\,$GeV using a nuclear emulsion detector
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Oshima, H., Matsuo, T., Ali, A., Aoki, S., Berns, L., Fukuda, T., Hanaoka, Y., Hayato, Y., Hiramoto, A., Ichikawa, A. K., Inamoto, H., Kasumi, A., Kawahara, H., Kikawa, T., Komatani, R., Komatsu, M., Kuretsubo, K., Marushima, T., Matsumoto, H., Mikado, S., Minamino, A., Mizuno, K., Morimoto, Y., Morishima, K., Naganawa, N., Naiki, M., Nakamura, M., Nakamura, Y., Nakano, T., Nakaya, T., Nishio, A., Odagawa, T., Ogawa, S., Rokujo, H., Sato, O., Shibuya, H., Sugimura, K., Suzui, L., Suzuki, Y., Takagi, H., Takahashi, S., Takao, T., Tanihara, Y., Watanabe, M., Yamada, K., Yasutome, K., Yokoyama, M., and Yoshimoto, M.
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High Energy Physics - Experiment - Abstract
This study conducted an analysis of muons, protons, and charged pions emitted from $\nu_{\mu}$ charged-current interactions on iron using a nuclear emulsion detector. The emulsion detector with a 65$\,$kg iron target was exposed to a neutrino beam corresponding to 4.0$\times$10$^{19}$ protons on target with a mean neutrino energy of 1.49$\,$GeV. The measurements were performed at a momentum threshold of 200 (50)$\,$MeV/$c$ for protons (pions), which are the lowest momentum thresholds attempted up to now. The measured quantities are the multiplicities, emission angles, and momenta of the muons, protons, and charged pions. In addition to these inclusive measurements, exclusive measurements such as the muon-proton emission-angle correlations of specific channels and the opening angle between the protons of CC0$\pi$2$p$ events were performed. The data were compared to Monte Carlo (MC) predictions and some significant differences were observed. The results of the study demonstrate the capability of detailed measurements of neutrino-nucleus interactions using a nuclear emulsion detector to improve neutrino interaction models., Comment: 21 pages, 25 figures
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- 2022
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3. Wide angle acceptance and high-speed track recognition in nuclear emulsion
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Suzuki, Y., Fukuda, T., Kawahara, H., Komatani, R., Naiki, M., Nakano, T., Odagawa, T., and Yoshimoto, M.
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Physics - Instrumentation and Detectors ,High Energy Physics - Experiment - Abstract
A nuclear emulsion film is a three-dimensional tracking device that is widely used in cosmic-ray and high energy physics experiments. Scanning with a wide angle acceptance is crucial for obtaining track information in emulsion films. This study presents a new method developed for wide angle acceptance and high-speed track recognition of nuclear emulsion films for neutrino-nucleus interaction measurements. The nuclear emulsion technique can be used to measure tracks of charged particles from neutrino interactions with a low momentum threshold. The detection of the particles with a wide angle acceptance is essential for obtaining detailed information on the interactions in the sub- and multi-GeV neutrino energy region. In the new method developed for a neutrino interaction measurement in J-PARC called NINJA, the angle acceptance is covered up to $|\tan\theta_{x(y)}| < 5.0$ (80% of all solid angles) with $150\,\mathrm{m^2/year}$. This method can also be used to improve the angle accuracy and recognition efficiency of the tracks., Comment: 20 pages, 17 figures
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- 2021
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4. First measurement using a nuclear emulsion detector of the $\nu_{\mu}$ charged-current cross section on iron around the 1$\,$GeV energy region
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Oshima, H., Matsuo, T., Ali, A., Aoki, S., Berns, L., Fukuda, T., Hanaoka, Y., Hayato, Y., Hiramoto, A., Ichikawa, A. K., Kawahara, H., Kikawa, T., Komatani, R., Komatsu, M., Kuretsubo, K., Marushima, T., Matsumoto, H., Mikado, S., Minamino, A., Mizuno, K., Morimoto, Y., Morishima, K., Naganawa, N., Naiki, M., Nakamura, M., Nakamura, Y., Nakano, N., Nakano, T., Nakaya, T., Nishio, A., Odagawa, T., Ogawa, S., Rokujo, H., Sato, O., Shibuya, H., Sugimura, K., Suzui, L., Suzuki, Y., Takagi, H., Takahashi, S., Takao, T., Tanihara, Y., Watanabe, R., Yamada, K., Yasutome, K., and Yokoyama, M.
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High Energy Physics - Experiment - Abstract
We have carried out $\nu_{\mu}$ charged-current interaction measurement on iron using an emulsion detector exposed to the T2K neutrino beam in the J-PARC neutrino facility. The data samples correspond to 4.0$\times$10$^{19}$ protons on target, and the neutrino mean energy is 1.49$\,$GeV. The emulsion detector is suitable for precision measurements of charged particles produced in neutrino-iron interactions with a low momentum threshold thanks to thin-layered structure and sub-$\mu$m spatial resolution. The charged particles are successfully detected, and their multiplicities are measured using the emulsion detector. The cross section was measured to be $\sigma^{\mathrm{Fe}}_{\mathrm{CC}} = (1.28 \pm 0.11({\mathrm{stat.}})^{+0.12}_{-0.11}({\mathrm{syst.}})) \times 10^{-38} \, {\mathrm{cm}}^{2}/{\mathrm{nucleon}}$. The cross section in a limited kinematic phase space of induced muons, $\theta_{\mu} < 45^{\circ}$ and $p_{\mu} > 400 \, {\rm MeV}/c$, on iron was $\sigma^{\mathrm{Fe}}_{\mathrm{CC \hspace{1mm} phase \hspace{0.5mm} space}} = (0.84 \pm 0.07({\mathrm{stat.}})^{+0.07}_{-0.06}({\mathrm{syst.}})) \times 10^{-38} \, {\mathrm{cm}}^{2}/{\mathrm{nucleon}}$. The cross-section results are consistent with previous values obtained via different techniques using the same beamline, and they are well reproduced by current neutrino interaction models. These results demonstrate the capability of the detector towards the detailed measurements of the neutrino-nucleus interactions around the 1$\,$GeV energy region., Comment: 27 pages, 17 figures
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- 2020
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5. First measurement of $\bar{\nu}_{\mu}$ and $\nu_{\mu}$ charged-current inclusive interactions on water using a nuclear emulsion detector
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Hiramoto, A., Suzuki, Y., Ali, A., Aoki, S., Berns, L., Fukuda, T., Hanaoka, Y., Hayato, Y., Ichikawa, A. K., Kawahara, H., Kikawa, T., Koga, T., Komatani, R., Komatsu, M., Kosakai, Y., Matsuo, T., Mikado, S., Minamino, A., Mizuno, K., Morimoto, Y., Morishima, K., Naganawa, N., Naiki, M., Nakamura, M., Nakamura, Y., Nakano, N., Nakano, T., Nakaya, T., Nishio, A., Odagawa, T., Ogawa, S., Oshima, H., Rokujo, H., Sanjana, I., Sato, O., Shibuya, H., Sugimura, K., Suzui, L., Takagi, H., Takao, T., Tanihara, Y., Yasutome, K., and Yokoyama, M.
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High Energy Physics - Experiment ,Physics - Instrumentation and Detectors - Abstract
This paper reports the track multiplicity and kinematics of muons, charged pions, and protons from charged-current inclusive $\bar{\nu}_{\mu}$ and $\nu_{\mu}$ interactions on a water target, measured using a nuclear emulsion detector in the NINJA experiment. A 3-kg water target was exposed to the T2K antineutrino-enhanced beam with a mean energy of 1.3 GeV. Owing to the high-granularity of the nuclear emulsion, protons with momenta down to 200 MeV/$c$ from the neutrino-water interactions were detected. We find good agreement between the observed data and model predictions for all kinematic distributions other than the number of charged pions. These results demonstrate the capability of measurements with nuclear emulsion to improve neutrino interaction models., Comment: 22 pages, 20 figures
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- 2020
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6. Directly Imaging Rocky Planets from the Ground
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Mazin, B., Artigau, É., Bailey, V., Baranec, C., Beichman, C., Benneke, B., Birkby, J., Brandt, T., Chilcote, J., Chun, M., Close, L., Currie, T., Crossfield, I., Dekany, R., Delorme, J. R., Dong, C., Dong, R., Doyon, R., Dressing, C., Fitzgerald, M., Fortney, J., Frazin, R., Gaidos, E., Guyon, O., Hashimoto, J., Hillenbrand, L., Howard, A., Jensen-Clem, R., Jovanovic, N., Kotani, T., Kawahara, H., Konopacky, Q., Knutson, H., Liu, M., Lu, J., Lozi, J., Macintosh, B., Males, J., Marley, M., Marois, C., Mawet, D., Meeker, S., Millar-Blanchaer, M., Mondal, S., Bose, S. N., Murakami, N., Murray-Clay, R., Narita, N., Pyo, T. S., Roberts, L., Ruane, G., Serabyn, G., Shields, A., Skemer, A., Simard, L., Stelter, D., Tamura, M., Troy, M., Vasisht, G., Wallace, J. K., Wang, J., and Wright, S.
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Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
Over the past three decades instruments on the ground and in space have discovered thousands of planets outside the solar system. These observations have given rise to an astonishingly detailed picture of the demographics of short-period planets, but are incomplete at longer periods where both the sensitivity of transit surveys and radial velocity signals plummet. Even more glaring is that the spectra of planets discovered with these indirect methods are either inaccessible (radial velocity detections) or only available for a small subclass of transiting planets with thick, clear atmospheres. Direct detection can be used to discover and characterize the atmospheres of planets at intermediate and wide separations, including non-transiting exoplanets. Today, a small number of exoplanets have been directly imaged, but they represent only a rare class of young, self-luminous super-Jovian-mass objects orbiting tens to hundreds of AU from their host stars. Atmospheric characterization of planets in the <5 AU regime, where radial velocity (RV) surveys have revealed an abundance of other worlds, is technically feasible with 30-m class apertures in combination with an advanced AO system, coronagraph, and suite of spectrometers and imagers. There is a vast range of unexplored science accessible through astrometry, photometry, and spectroscopy of rocky planets, ice giants, and gas giants. In this whitepaper we will focus on one of the most ambitious science goals --- detecting for the first time habitable-zone rocky (<1.6 R_Earth) exoplanets in reflected light around nearby M-dwarfs, Comment: 8 pages, 1 figure, Astro2020 Science White Paper
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- 2019
7. X-ray study of the double radio relic Abell 3376 with Suzaku
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Urdampilleta, I., Akamatsu, H., Mernier, F., Kaastra, J. S., de Plaa, J., Ohashi, T., Ishisaki, Y., and Kawahara, H.
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
We present an X-ray spectral analysis of the nearby double radio relic merging cluster Abell 3376 ($z$ = 0.046), observed with the $Suzaku$ XIS instrument. These deep ($\sim$360 ks) observations cover the entire double relic region in the outskirts of the cluster. These diffuse radio structures are amongst the largest and arc-shaped relics observed in combination with large-scale X-ray shocks in a merging cluster. We confirm the presence of a stronger shock (${\cal M}_{\rm{W}}$ = 2.8 $\pm~0.4$) in the western direction at $r\sim26$', derived from a temperature and surface brightness discontinuity across the radio relic. In the East, we detect a weaker shock (${\cal M}_{\rm{E}}$ = 1.5 $\pm~0.1$) at $r\sim8$', possibly associated to the 'notch' of eastern relic, and a cold front at $r\sim3$'. Based on the shock speed calculated from the Mach numbers, we estimate that the dynamical age of the shock front is $\sim$0.6 Gyr after core passage, indicating that Abell 3376 is still an evolving merging cluster and that the merger is taking place close to the plane of the sky. These results are consistent with simulations and optical and weak lensing studies from the literature., Comment: Accepted for publication in A&A, 15 pages, 19 figures, 11 tables
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- 2018
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8. A Cold/Ultracold Neutron Detector using Fine-grained Nuclear Emulsion with Spatial Resolution less than 100 nm
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Naganawa, N., Ariga, T., Awano, S., Hino, M., Hirota, K., Kawahara, H., Kitaguchi, M., Mishima, K., Shimizu, H. M., Tada, S., Tasaki, S., and Umemoto, A.
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Physics - Instrumentation and Detectors ,High Energy Physics - Experiment ,Nuclear Experiment - Abstract
A new type of cold/ultracold neutron detector that can realize a spatial resolution of less than 100 nm was developed using nuclear emulsion. The detector consists of a fine-grained nuclear emulsion coating and a 50-nm thick $^{10}$B$_4$C layer for the neutron conversion. The detector was exposed to cold and ultracold neutrons (UCNs) at the J-PARC. Detection efficiencies were measured as (0.16$\pm$0.02)% and (12$\pm$2)% for cold and ultracold neutrons consistently with the $^{10}$B content in the converter. Positions of individual neutrons can be determined by observing secondary particle tracks recorded in the nuclear emulsion. The spatial resolution of incident neutrons were found to be in the range of 11-99 nm in the angle region of tan$\theta\leq 1.9$, where $\theta$ is the angle between a recorded track and the normal direction of the converter layer. The achieved spatial resolution corresponds to the improvement of one or two orders of magnitude compared with conventional techniques and it is comparable with the wavelength of UCNs.
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- 2018
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9. Design and performance of a scintillation tracker for track matching in nuclear-emulsion-based neutrino interaction measurement
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Odagawa, T., Fukuda, T., Hiramoto, A., Kawahara, H., Kikawa, T., Minamino, A., Nakaya, T., Sato, O., Suzuki, Y., and Yasutome, K.
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- 2022
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10. Pioneering high contrast science instruments for planet characterization on giant segmented mirror telescopes
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Jovanovic, N., Guyon, O., Lozi, J., Tamura, M., Norris, B., Tuthill, P., Huby, E., Perrin, G., Lacour, S., Marchis, F., Duchene, G., Gauchet, L., Ireland, M., Feger, T., Rains, A., Bento, J., Schwab, C., Coutts, D., Cvetojevic, N., Gross, S., Arriola, A., Lagadec, T., Goebel, S., Hall, D., Jacobson, S., Mazin, B., Walter, A., Massie, J., Groff, T., Chilcote, J., Kasdin, J., Brandt, T., Loomis, C., Galvin, M., Kotani, T., Kawahara, H., Martinache, F., Pathak, P., and Males, J.
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Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
A suite of science instruments is critical to any high contrast imaging facility, as it defines the science capabilities and observing modes available. SCExAO uses a modular approach which allows for state-of-the-art visitor modules to be tested within an observatory environment on an 8-m class telescope. This allows for rapid prototyping of new and innovative imaging techniques that otherwise take much longer in traditional instrument design. With the aim of maturing science modules for an advanced high contrast imager on an giant segmented mirror telescopes (GSMTs) that will be capable of imaging terrestrial planets, we offer an overview and status update on the various science modules currently under test within the SCExAO instrument., Comment: 11 pages, 3 figures, AO4ELTs4 conference
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- 2017
11. Developing post-coronagraphic, high-resolution spectroscopy for terrestrial planet characterization on ELTs
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Jovanovic, N., Guyon, O., Kotani, T., Kawahara, H., Hosokawa, K., Lozi, J., Males, J., Ireland, M., Tamura, M., Mawet, D., Schwab, C., Norris, B., Leon-Saval, S., Betters, C., and Tuthill, P.
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Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
Spectroscopic observations are extremely important for determining the composition, structure, and surface gravity of exoplanetary atmospheres. High resolution spectroscopy of the planet itself has only been demonstrated a handful of times. By using advanced high contrast imagers, it is possible to conduct high resolution spectroscopy on imageable exoplanets, after the star light is first suppressed with an advanced coronagraph. Because the planet is spatially separated in the focal plane, a single mode fiber could be used to collect the light from the planet alone, reducing the photon noise by orders of magnitude. In addition, speckle control applied to the location where an exoplanet is known to exist, can be used to preferentially reject the stellar flux from the fiber further. In this paper we will present the plans for conducting high resolution spectroscopic studies of this nature with the combination of SCExAO and IRD in the H-band on the Subaru Telescope. This technique will be critical to the characterization of terrestrial planets on ELTs and future space missions., Comment: 11 pages, 3 figures, AO4ELTs4 conference held in Tenerife
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- 2017
12. First demonstration of emulsion multi-stage shifter for accelerator neutrino experiment in J-PARC T60
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Yamada, K., Aoki, S., Cao, S., Chikuma, N., Fukuda, T., Fukuzawa, Y., Gonin, M., Hayashino, T., Hayato, Y., Hiramoto, A., Hosomi, F., Ishiguro, K., Iori, S., Inoh, T., Kawahara, H., Kim, H., Kitagawa, N., Koga, T., Komatani, R., Komatsu, M., Matsushita, A., Mikado, S., Minamino, A., Mizusawa, H., Morishima, K., Matsuo, T., Matsumoto, T., Morimoto, Y., Morishita, M., Nakamura, K., Nakamura, M., Nakamura, Y., Naganawa, N., Nakano, T., Nakaya, T., Nakatsuka, Y., Nishio, A., Ogawa, S., Oshima, H., Quilain, B., Rokujo, H., Sato, O., Seiya, Y., Shibuya, H., Shiraishi, T., Suzuki, Y., Tada, S., Takahashi, S., Yoshimoto, M., and Yokoyama, M.
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Physics - Instrumentation and Detectors - Abstract
We describe the first ever implementation of an emulsion multi-stage shifter in an accelerator neutrino experiment. The system was installed in the neutrino monitor building in J-PARC as a part of a test experiment T60 and stable operation was maintained for a total of 126.6 days. By applying time information to emulsion films, various results were obtained. Time resolutions of 5.3 to 14.7 s were evaluated in an operation spanning 46.9 days (time resolved numbers of 3.8--1.4$\times10^{5}$). By using timing and spatial information, a reconstruction of coincident events that consisted of high multiplicity events and vertex events, including neutrino events was performed. Emulsion events were matched to events observed by INGRID, one of near detectors of the T2K experiment, with high reliability (98.5\%) and hybrid analysis was established via use of the multi-stage shifter. The results demonstrate that the multi-stage shifter is feasible for use in neutrino experiments.
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- 2017
13. First neutrino event detection with nuclear emulsion at J-PARC neutrino beamline
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Fukuda, T., Aoki, S., Cao, S., Chikuma, N., Fukuzawa, Y., Gonin, M., Hayashino, T., Hayato, Y., Hiramoto, A., Hosomi, F., Ishiguro, K., Iori, S., Inoh, T., Kawahara, H., Kim, H., Kitagawa, N., Koga, T., Komatani, R., Komatsu, M., Matsushita, A., Mikado, S., Minamino, A., Mizusawa, H., Morishima, K., Matsuo, T., Matsumoto, T., Morimoto, Y., Morishita, M., Nakamura, K., Nakamura, M., Nakamura, Y., Naganawa, N., Nakano, T., Nakaya, T., Nakatsuka, Y., Nishio, A., Ogawa, S., Oshima, H., Quilain, B., Rokujo, H., Sato, O., Seiya, Y., Shibuya, H., Shiraishi, T., Suzuki, Y., Tada, S., Takahashi, S., Yamada, K., Yoshimoto, M., and Yokoyama, M.
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High Energy Physics - Experiment ,Physics - Instrumentation and Detectors - Abstract
Precise neutrino--nucleus interaction measurements in the sub-multi GeV region are important to reduce the systematic uncertainty in future neutrino oscillation experiments. Furthermore, the excess of ${\nu_e}$ interactions, as a possible interpretation of the existence of a sterile neutrino has been observed in such an energy region. The nuclear emulsion technique can measure all the final state particles with low energy threshold for a variety of targets (Fe, C, H${_2}$O, and so on). Its sub-$\mu$m position resolution allows measurements of the ${\nu_e}$ cross-section with good electron/gamma separation capability. We started a new experiment at J-PARC to study sub-multi GeV neutrino interactions by introducing the nuclear emulsion technique. The J-PARC T60 experiment has been implemented as a first step of such a project. Systematic neutrino event analysis with full scanning data in the nuclear emulsion detector was performed for the first time. The first neutrino event detection and its analysis is described in this paper., Comment: 26 pages, 29 figures, 4 table, prepared for submission to PTEP
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- 2017
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14. STRAIGHTMORPH: A Voice Morphing Tool for Research in Voice Communication Sciences
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Belin, P, primary and Kawahara, H, additional
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- 2024
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15. AB1414 THE LONG-TERM PROGNOSIS OF ANEURYSM FORMATION AND HYDRONEPHROSIS DUE TO IgG4-RELATED PERIAORTITIS/PERIARTERITIS AND RETROPERITONEAL FIBROSIS (IgG4-PA/RPF): A RETROSPECTIVE SINGLE-CENTER STUDY
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Sanada, H., primary, Mizushima, I., additional, Kawahara, H., additional, Tsuge, S., additional, Ito, K., additional, Kitajima, S., additional, Toyama, T., additional, Sakai, N., additional, Shimizu, M., additional, Iwata, Y., additional, and Kawano, M., additional
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- 2024
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16. POS0362 SUCCESSFUL DIFFERENTIATION OF IgG4-RELATED PERIAORTITIS/PERIARTERITIS AND RETROPERITONEAL FIBROSIS (IgG4-PA/RPF) FROM MIMICKERS BASED ON ILIAC ARTERY INVOLVEMENT, PRESENCE OF EXTRA-PA/RPF LESIONS, AND INCLUSION SCORES OF THE ACR/EULAR CLASSIFICATION CRITERIA FOR IgG4-RELATED DISEASE
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Mizushima, I., primary, Tsuge, S., additional, Sanada, H., additional, Kawahara, H., additional, Fujisawa, Y., additional, Ito, K., additional, Kitajima, S., additional, Toyama, T., additional, Fujii, H., additional, Sakai, N., additional, Shimizu, M., additional, Iwata, Y., additional, and Kawano, M., additional
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- 2024
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17. A neutron detector with spatial resolution of submicron using fine-grained nuclear emulsion
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Naganawa, N., Awano, S., Hino, M., Hirose, M., Hirota, K., Kawahara, H., Kitaguchi, M., Mishima, K., Nagae, T., Shimizu, H. M., Tasaki, S., and Umemoto, A.
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Physics - Instrumentation and Detectors - Abstract
We have been developing a neutron detector with spatial resolution of submicron by loading 6Li into fine-grained nuclear emulsion. By exposure to thermal neutrons, tracks from neutron capture events were observed. From their grain density, spatial resolution was estimated. Detection efficiency was also measured by an experiment with cold neutrons., Comment: 6 pages, 5 figures, proceedings of 8th International Topical Meeting on Neutron Radiography, ITMNR-8, 4-8 September 2016, Beijing, China. To be published by Physics Procedia
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- 2016
18. Suzaku observations of the merging galaxy cluster Abell2255: The northeast radio relic
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Akamatsu, H., Mizuno, M., Ota, N., Zhang, Y. -Y., van Weeren, R. J., Kawahara, H., Fukazawa, Y., Kaastra, J. S., Kawaharada, M., Nakazawa, K., Ohashi, T., Röttgering, H. J. A., Takizawa, M., Vink, J., and Zandanel, F.
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Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present the results of deep 140 ks Suzaku X-ray observations of the north-east (NE) radio relic of the merging galaxy cluster Abell2255. The temperature structure of Abell2255 is measured out to 0.9 times the virial radius (1.9 Mpc) in the NE direction for the first time. The Suzaku temperature map of the central region suggests a complex temperature distribution, which agrees with previous work. Additionally, on a larger-scale, we confirm that the temperature drops from 6 keV around the cluster center to 3 keV at the outskirts, with two discontinuities at {\it r}$\sim$5\arcmin~(450 kpc) and $\sim$12\arcmin~(1100 kpc) from the cluster center. Their locations coincide with surface brightness discontinuities marginally detected in the XMM-Newton image, which indicates the presence of shock structures. From the temperature drop, we estimate the Mach numbers to be ${\cal M}_{\rm inner}\sim$1.2 and, ${\cal M}_{\rm outer}\sim$1.4. The first structure is most likely related to the large cluster core region ($\sim$350--430 kpc), and its Mach number is consistent with the XMM-Newton observation (${\cal M}\sim$1.24: Sakelliou & Ponman 2006). Our detection of the second temperature jump, based on the Suzaku key project observation, shows the presence of a shock structure across the NE radio relic. This indicates a connection between the shock structure and the relativistic electrons that generate radio emission. Across the NE radio relic, however, we find a significantly lower temperature ratio ($T_1/T_2\sim1.44\pm0.16$ corresponds to~${\cal M}_{\rm X-ray}\sim1.4$) than the value expected from radio wavelengths, based on the standard diffusive shock acceleration mechanism ($T_1/T_2>$ 3.2 or ${\cal M}_{\rm Radio}>$ 2.8)., Comment: 12 pages, 11 figures, accepted for publication in A&A
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- 2016
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19. $Suzaku$ X-ray study of the double radio relic galaxy cluster CIZA J2242.8+5301
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Akamatsu, H., van Weeren, R. J., Ogrean, G. A., Kawahara, H., Stroe, A., Sobral, D., Hoeft, M., Röttgering, H., Brüggen, M., and Kaastra, J. S.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
Content: We present the results from $Suzaku$ observations of the merging cluster of galaxies CIZA J2242.8+5301 at $z$=0.192. Aims. To study the physics of gas heating and particle acceleration in cluster mergers, we investigated the X-ray emission from CIZA J2242.8+5301, which hosts two giant radio relics in the northern/southern part of the cluster. Methods. We analyzed data from three-pointed Suzaku observations of CIZA J2242.8+5301 to derive the temperature distribution in four different directions. Results: The Intra-Cluster Medium (ICM) temperature shows a remarkable drop from 8.5$_{-0.6}^{+0.8}$ keV to 2.7$_{-0.4}^{+0.7}$ keV across the northern radio relic. The temperature drop is consistent with a Mach number ${\cal M}_n=2.7^{+0.7}_{-0.4}$ and a shock velocity $v_{shock:n}=2300_{-400}^{+700}\rm\,km\,s^{-1}$. We also confirm the temperature drop across the southern radio relic. However, the ICM temperature beyond this relic is much higher than beyond the northern one, which gives a Mach number ${\cal M}_s=1.7^{+0.4}_{-0.3}$ and shock velocity $v_{shock:s}=2040_{-410}^{+550}\rm \,km\,s^{-1}$. These results agree with other systems showing a relationship between the radio relics and shock fronts which are induced by merging activity. We compare the X-ray derived Mach numbers with the radio derived Mach numbers from the radio spectral index under the assumption of diffusive shock acceleration in the linear test particle regime. For the northern radio relic, the Mach numbers derived from X-ray and radio observations agree with each other. Based on the shock velocities, we estimate that CIZA J2242.8+5301 is observed approximately 0.6 Gyr after core passage. The magnetic field pressure at the northern relic is estimated to be 9% of the thermal pressure., Comment: 12 pages, 10 figures, A&A accepted
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- 2015
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20. Observation of nu_tau appearance in the CNGS beam with the OPERA experiment
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OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Asada, T., Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Buttne, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Giacomelli, G., Goellnitz, C., Goldberg, J., Gornushkin, Y., Grella, G., Guler, M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Katsuragawa, T., Kawada, J., Kawahara, H., Kim, J. H., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malenica, M., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Meyer, M., Mikado, S., Miyanishi, M., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., Park, B. D., Park, I. G., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Umemoto, A., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., Yaguchi, I., Yoshimoto, M., Zemskova, S., and Zghiche, A.
- Subjects
High Energy Physics - Experiment - Abstract
The OPERA experiment is searching for nu_mu -> nu_tau oscillations in appearance mode i.e. via the direct detection of tau leptons in nu_tau charged current interactions. The evidence of nu_mu -> nu_tau appearance has been previously reported with three nu_tau candidate events using a sub-sample of data from the 2008-2012 runs. We report here a fourth nu_tau candidate event, with the tau decaying into a hadron, found after adding the 2012 run events without any muon in the final state to the data sample. Given the number of analysed events and the low background, nu_mu -> nu_tau oscillations are established with a significance of 4.2sigma., Comment: Submitted to Progress of Theoretical and Experimental Physics (PTEP)
- Published
- 2014
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21. Evidence for $\nu_\mu \to \nu_\tau$ appearance in the CNGS neutrino beam with the OPERA experiment
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Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Asada, T., Autiero, D., Dhahbi, A. Ben, Badertscher, A., Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Brunet, F., Brunetti, G., Buonaura, A., Buontempo, S., Buettner, B., Chaussard, L., Chernyavsky, M., Chiarella, V., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Favier, J., Ferber, T., Ferone, G., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Giacomelli, G., Goellnitz, C., Goldberg, J., Gornushkin, Y., Grella, G., Grianti, F., Guler, M., Gustavino, C., Hagner, C., Hakamata, K., Hara, T., Hayakawa, T., Hierholzer, M., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Ishikawa, M., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Katsuragawa, T., Kawada, J., Kawahara, H., Kim, J. H., Kim, S. H., Kimura, M., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Marteau, J., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Migliozzi, P., Mikado, S., Miyanishi, M., Miyashita, E., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., Park, B. D., Park, I. G., Pastore, A., Patrizii, L., Pennacchio, E., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pretzl, K., Pupilli, F., Rescigno, R., Roda, M., Rokujo, H., Roganova, T., Rosa, G., Rostovtseva, I., Rubbia, A., Ryazhskaya, O., Sato, O., Sato, Y., Schembri, A., Schmidt-Parzefal, W., Shakiryanova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strauss, T., Strolin, P., Suzuki, K., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., Yoshida, J., Yoshimoto, M., Zaitsev, Y., Zemskova, S., and Zghiche, A.
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High Energy Physics - Experiment ,Physics - Instrumentation and Detectors - Abstract
The OPERA experiment is designed to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations in appearance mode i.e. through the direct observation of the $\tau$ lepton in $\nu_{\tau}$ charged current interactions. The experiment has taken data for five years, since 2008, with the CERN Neutrino to Gran Sasso beam. Previously, two $\nu_{\tau}$ candidates with a $\tau$ decaying into hadrons were observed in a sub-sample of data of the 2008-2011 runs. Here we report the observation of a third $\nu_\tau$ candidate in the $\tau^-\to\mu^-$ decay channel coming from the analysis of a sub-sample of the 2012 run. Taking into account the estimated background, the absence of $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations is excluded at the 3.4 $\sigma$ level., Comment: 9 pages, 5 figures, 1 tables
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- 2014
- Full Text
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22. New results on $\nu_\mu \to \nu_\tau$ appearance with the OPERA experiment in the CNGS beam
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OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Asada, T., Autiero, D., Badertscher, A., Dhahbi, A. Ben, Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Brunetti, G., Buettner, B., Buontempo, S., Chaussard, L., Chernyavskiy, M., Chiarella, V., Chukanov, A., Consiglio, L., D'Ambrosio, N., Sanchez, P. Del Amo, De Lellis, G., De Serio, M., Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Ebert, J., Ereditato, A., Favier, J., Ferber, T., Fini, R. A., Fukuda, T., Garfagnini, A., Giacomelli, G., Goellnitz, C., Goldberg, J., Gornushkin, Y., Grella, G., Grianti, F., Guler, A. M., Gustavino, C., Hagner, C., Hakamata, K., Hara, T., Hayakawa, T., Hierholzer, M., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Ishikawa, M., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Katsuragawa, T., Kawahara, H., Kawada, J., Kim, J. H., Kim, S. H., Kimura, M., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Marteau, J., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Migliozzi, P., Mikado, S., Minotti, A., Miyanishi, M., Miyashita, E., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., Park, B. D., Park, I. G., Pastore, A., Patrizii, L., Pennacchio, E., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pretzl, K., Pupilli, F., Rescigno, R., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Rostovtseva, I., Rubbia, A., Russo, A., Ryazhskaya, O., Sato, O., Sato, Y., Schembri, A., Schmidt-Parzefall, W., Shakiryanova, I., Schcedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strauss, T., Strolin, P., Suzuki, K., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tolun, P., Tufanli, S., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., Yoshida, J., Yoshimoto, M., Zaitsev, Y., Zemskova, S., and Zghiche, A.
- Subjects
High Energy Physics - Experiment ,Physics - Instrumentation and Detectors - Abstract
The OPERA neutrino experiment is designed to perform the first observation of neutrino oscillations in direct appearance mode in the $\nu_\mu \to \nu_\tau$ channel, via the detection of the $\tau$-leptons created in charged current $\nu_\tau$ interactions. The detector, located in the underground Gran Sasso Laboratory, consists of an emulsion/lead target with an average mass of about 1.2 kt, complemented by electronic detectors. It is exposed to the CERN Neutrinos to Gran Sasso beam, with a baseline of 730 km and a mean energy of 17 GeV. The observation of the first $\nu_\tau$ candidate event and the analysis of the 2008-2009 neutrino sample have been reported in previous publications. This work describes substantial improvements in the analysis and in the evaluation of the detection efficiencies and backgrounds using new simulation tools. The analysis is extended to a sub-sample of 2010 and 2011 data, resulting from an electronic detector-based pre-selection, in which an additional $\nu_\tau$ candidate has been observed. The significance of the two events in terms of a $\nu_\mu \to \nu_\tau$ oscillation signal is of 2.40 $\sigma$., Comment: 33 pages, 12 figures, 5 tables. Prepared for submission to JHEP
- Published
- 2013
23. ORIGIN: Metal Creation and Evolution from the Cosmic Dawn
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Herder, J. W. den, Piro, L., Ohashi, T., Kouveliotou, C., Hartmann, D. H., Kaastra, J. S., Amati, L., Andersen, M. I., Arnaud, M., Attéia, J-L., Bandler, S., Barbera, M., Barcons, X., Barthelmy, S., Basa, S., Basso, S., Boer, M., Branchini, E., Branduardi-Raymont, G., Borgani, S., Boyarsky, A., Brunetti, G., Budtz-Jorgensen, C., Burrows, D., Butler, N., Campana, S., Caroli, E., Ceballos, M., Christensen, F., Churazov, E., Comastri, A., Colasanti, L., Cole, R., Content, R., Corsi, A., Costantini, E., Conconi, P., Cusumano, G., de Plaa, J., De Rosa, A., Del Santo, M., Di Cosimo, S., De Pasquale, M., Doriese, R., Ettori, S., Evans, P., Ezoe, Y., Ferrari, L., Finger, H., Figueroa-Feliciano, T., Friedrich, P., Fujimoto, R., Furuzawa, A., Fynbo, J., Gatti, F., Galeazzi, M., Gehrels, N., Gendre, B., Ghirlanda, G., Ghisellini, G., Gilfanov, M., Giommi, P., Girardi, M., Grindlay, J., Cocchi, M., Godet, O., Guedel, M., Haardt, F., Hartog, R. den, Hepburn, I., Hermsen, W., Hjorth, J., Hoekstra, H., Holland, A., Hornstrup, A., van der Horst, A., Hoshino, A., Zand, J. in 't, Irwin, K., Ishisaki, Y., Jonker, P., Kitayama, T., Kawahara, H., Kawai, N., Kelley, R., Kilbourne, C., de Korte, P., Kusenko, A., Kuvvetli, I., Labanti, M., Macculi, C., Maiolino, R., Hesse, M. Mas, Matsushita, K., Mazzotta, P., McCammon, D., Méndez, M., Mignani, R., Mineo, T., Mitsuda, K., Mushotzky, R., Molendi, S., Moscardini, L., Natalucci, L., Nicastro, F., O'Brien, P., Osborne, J., Paerels, F., Page, M., Paltani, S., Pedersen, K., Perinati, E., Ponman, T., Pointecouteau, E., Predehl, P., Porter, S., Rasmussen, A., Rauw, G., Röttgering, H., Roncarelli, M., Rosati, P., Quadrini, E., Ruchayskiy, O., Salvaterra, R., Sasaki, S., Sato, K., Savaglio, S., Schaye, J., Sciortino, S., Shaposhnikov, M., Sharples, R., Shinozaki, K., Spiga, D., Sunyaev, R., Suto, Y., Takei, Y., Tanvir, N., Tashiro, M., Tamura, T., Tawara, Y., Troja, E., Tsujimoto, M., Tsuru, T., Ubertini, P., Ullom, J., Ursino, E., Verbunt, F., van de Voort, F., Viel, M., Wachter, S., Watson, D., Weisskopf, M., Werner, N., White, N., Willingale, R., Wijers, R., Yamasaki, N., Yoshikawa, K., and Zane, S.
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Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - Cosmology and Extragalactic Astrophysics ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
ORIGIN is a proposal for the M3 mission call of ESA aimed at the study of metal creation from the epoch of cosmic dawn. Using high-spectral resolution in the soft X-ray band, ORIGIN will be able to identify the physical conditions of all abundant elements between C and Ni to red-shifts of z=10, and beyond. The mission will answer questions such as: When were the first metals created? How does the cosmic metal content evolve? Where do most of the metals reside in the Universe? What is the role of metals in structure formation and evolution? To reach out to the early Universe ORIGIN will use Gamma-Ray Bursts (GRBs) to study their local environments in their host galaxies. This requires the capability to slew the satellite in less than a minute to the GRB location. By studying the chemical composition and properties of clusters of galaxies we can extend the range of exploration to lower redshifts (z ~ 0.2). For this task we need a high-resolution spectral imaging instrument with a large field of view. Using the same instrument, we can also study the so far only partially detected baryons in the Warm-Hot Intergalactic Medium (WHIM). The less dense part of the WHIM will be studied using absorption lines at low redshift in the spectra for GRBs., Comment: 34 pages, 13 figures. ESA Cosmic Vision medium-class mission (M3) proposal. Accepted for publication in Experimental Astronomy. Including minor corrections in the author list
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- 2011
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24. Colors of a Second Earth: Estimating the fractional areas of ocean, land, and vegetation of Earth-like exoplanets
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Fujii, Y., Kawahara, H., Suto, Y., Taruya, A., Fukuda, S., Nakajima, T., and Turner, E. L.
- Subjects
Astrophysics - Earth and Planetary Astrophysics - Abstract
Characterizing the surfaces of rocky exoplanets via the scattered light will be an essential challenge to investigate the existence of life on habitable exoplanets. We present a simple reconstruction method for fractional areas of different surface types from photometric variations, or colors, of a second Earth. We create mock light curves for Earth without clouds using empirical data. Then these light curves are fitted to the isotropic scattering model consisting of 4 surface types: ocean, soil, snow and vegetation. In an idealized situation where the photometric errors are only photon shot noise, we are able to reproduce the fractional areas of those components fairly well. We may be even able to detect a signature of vegetation from the distinct feature of photosynthesis on the Earth, known as the red edge. In our reconstruction method, Rayleigh scattering due to the atmosphere has an important effect, and for terrestrial exoplanets with atmosphere similar to our Earth, it is possible to estimate the presence of oceans and an atmosphere simultaneously., Comment: 39 pages, 18 figures, matches published version in ApJ
- Published
- 2009
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25. Characterization of proteasomes isolated from sea urchin gametes
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Yokosawa, H., primary, Miyamatsu, H., additional, Kawahara, H., additional, and Saitoh, Y., additional
- Published
- 2020
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26. DIOS: the Diffuse Intergalactic Oxygen Surveyor
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Ohashi, T., Ishida, M., Sasaki, S., Ishisaki, Y., Mitsuda, K., Yamasaki, N. Y., Fujimoto, R., Takei, Y., Tawara, Y., Furuzawa, A., Suto, Y., Yoshikawa, K., Kawahara, H., Kawai, N., Tsuru, T. G., Matsushita, K., and Kitayama, T.
- Subjects
Astrophysics - Abstract
We present our proposal for a small X-ray mission DIOS (Diffuse Intergalactic Oxygen Surveyor), consisting of a 4-stage X-ray telescope and an array of TES microcalorimeters, cooled with mechanical coolers, with a total weight of about 400 kg. The mission will perform survey observations of warm-hot intergalactic medium using OVII and OVIII emission lines, with the energy coverage up to 1.5 keV. The wide field of view of about 50' diameter, superior energy resolution close to 2 eV FWHM, and very low background will together enable us a wide range of science for diffuse X-ray sources. We briefly describe the design of the satellite, performance of the subsystems and the expected results., Comment: 9 pages, 11 figures, a proceedings of SPIE "Astronomical Telescopes and Instrumentation" 2006
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- 2006
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27. A Neutron Detector with Submicron Spatial Resolution using Fine-grained Nuclear Emulsion
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Naganawa, N., Awano, S., Hino, M., Hirose, M., Hirota, K., Kawahara, H., Kitaguchi, M., Mishima, K., Nagae, T., Shimizu, H.M., Tasaki, S., and Umemoto, A.
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- 2017
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28. Religion and Politics of Contemporary Japan
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Kawahara, H., primary
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- 2018
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29. Cross Sections and Oscillator Strengths for Electron-impact Excitation of Electronic States in Polyatomic Molecules -Application Examples of the BEf- scaling model in Optically-allowed Transitions
- Author
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KATO, H., KAWAHARA, H., HOSHINO, M., GARCIA, M. C., BUCKMAN, S. J., BRUNGER, M. J., CAMPBELL, L., CHO, H., KIM, Y.-K., YOON, J.-S., SONG, Mi-Young, KATO, Daiji, MURAKAMI, Izumi, KATO, Takako, TANAKA, H., KATO, H., KAWAHARA, H., HOSHINO, M., GARCIA, M. C., BUCKMAN, S. J., BRUNGER, M. J., CAMPBELL, L., CHO, H., KIM, Y.-K., YOON, J.-S., SONG, Mi-Young, KATO, Daiji, MURAKAMI, Izumi, KATO, Takako, and TANAKA, H.
- Abstract
Integral cross sections for optically allowed electronic-state excitations by electron impact, are reviewed for polyatomic molecules by applying the Binary-Encounter-Bethe (BEB) scaling model. Following the context of the present review, the scaling model originally proposed by Yong-Ki Kim to determine electron-impact cross sections for ionization of atoms and molecules is also summarized briefly for its wide range of applications [Electron-Impact Cross Section Database, NIST, Y.-K. Kim][1]. The present report not only focuses on the need for the cross-section data, but also elucidates the verification of the scaling model in the general application for atoms and molecules. Since this report is for a data base, it is summarized for data base users by citing (copying) the descriptions in the original papers and the references within those papers in the style of a textbook.
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- 2023
30. Test of a Conceptual Prototype of the Total Internal Reflection Cherinkov Imaging Detector (DIRC) with Cosmic Muons
- Author
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Aston, D., Hearty, C., Kadyk, J., Kawahara, H., Lu, A., Lunch, G., McShurley, D., Meadows, B., Muller, D., Oxoby, G., Pope, W., Pripstein, M., Ratcliff, B., Reif, R., Simopoulos, C., Smy, M., Staengle, H., Stiles, P., Wang, M.Z., Warner, D., Wenzel, W., Wilson, R.J., Yellin, S., and Zhu, Y.
- Published
- 1994
31. Measurement of 3He analyzing power for p-3He scattering using the polarized 3He target
- Author
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A. Watanabe, S. Nakai, K. Sekiguchi, T. Akieda, D. Etoh, M. Inoue, Y. Inoue, K. Kawahara, H. Kon, K. Miki, T. Mukai, D. Sakai, S. Shibuya, Y. Shiokawa, T. Taguchi, H. Umetsu, Y. Utsuki, Y. Wada, M. Watanabe, M. Itoh, T. Ino, T. Wakui, K. Hatanaka, H. Kanda, H. J. Ong, D. T. Tran, S. Goto, Y. Hirai, D. Inomoto, H. Kasahara, S. Mitsumoto, H. Oshiro, T. Wakasa, Y. Maeda, K. Nonaka, H. Sakai, T. Uesaka
- Subjects
Physics ,QC1-999 - Abstract
Proton–3He scattering is one of the good probes to study the T = 3/2 channel of three– nucleon forces. We have measured 3He analyzing powers for p−3He elastic scattering with the polarized 3He target at 70 and 100 MeV. In the conference the data were com- pared with the theoretical predictions based on the modern nucleon–nucleon potentials. Large discrepancies were found between the data and the calculations at the angles where the 3He analyzing power takes the minimum and maximum values.
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- 2020
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32. Measurements of protons and charged pions emitted from <math><msub><mi>ν</mi><mi>μ</mi></msub></math> charged-current interactions on iron at a mean neutrino energy of 1.49 GeV using a nuclear emulsion detector
- Author
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Oshima, H., Matsuo, T., Ali, A., Aoki, S., Berns, L., Fukuda, T., Hanaoka, Y., Hayato, Y., Hiramoto, A., Ichikawa, A. K., Inamoto, H., Kasumi, A., Kawahara, H., Kikawa, T., Komatani, R., Komatsu, M., Kuretsubo, K., Marushima, T., Matsumoto, H., Mikado, S., Minamino, A., Mizuno, K., Morimoto, Y., Morishima, K., Naganawa, N., Naiki, M., Nakamura, M., Nakamura, Y., Nakano, T., Nakaya, T., Nishio, A., Odagawa, T., Ogawa, S., Rokujo, H., Sato, O., Shibuya, H., Sugimura, K., Suzui, L., Suzuki, Y., Takagi, H., Takahashi, S., Takao, T., Tanihara, Y., Watanabe, M., Yamada, K., Yasutome, K., Yokoyama, M., and Yoshimoto, M.
- Abstract
This study conducted an analysis of muons, protons, and charged pions emitted from νμ charged-current interactions on iron using a nuclear emulsion detector. The emulsion detector with a 65 kg iron target was exposed to a neutrino beam corresponding to 4.0×1019 protons on target with a mean neutrino energy of 1.49 GeV. The measurements were performed at a momentum threshold of 200 (50) MeV/c for protons (pions), which are the lowest momentum thresholds attempted up to now. The measured quantities are the multiplicities, emission angles, and momenta of the muons, protons, and charged pions. In addition to these inclusive measurements, exclusive measurements such as the muon-proton emission-angle correlations of specific channels and the opening angle between the protons of CC0π2p events were performed. The data were compared to Monte Carlo predictions and some significant differences were observed. The results of the study demonstrate the capability of detailed measurements of neutrino-nucleus interactions using a nuclear emulsion detector to improve neutrino interaction models.
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- 2022
33. Human-Human Hybridomas Producing Monoclonal Antibodies Reactive to House Dust Mites Antigen
- Author
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Kawahara, H., Maeda-Yamamoto, M., Suzuki, M., Osada, K., Tsuji, K., Ikura, Kouji, editor, Nagao, Masaya, editor, Masuda, Seiji, editor, and Sasaki, Ryuzo, editor
- Published
- 2002
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34. Wide angle acceptance and high-speed track recognition in nuclear emulsion
- Author
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Suzuki, Y., Fukuda, T., Kawahara, H., Komatani, R., Naiki, M., Nakano, T., Odagawa, T., and Yoshimoto, M.
- Subjects
High Energy Physics - Experiment (hep-ex) ,Physics - Instrumentation and Detectors ,FOS: Physical sciences ,General Physics and Astronomy ,Instrumentation and Detectors (physics.ins-det) ,Nuclear Experiment ,High Energy Physics - Experiment - Abstract
A nuclear emulsion film is a three-dimensional tracking device that is widely used in cosmic-ray and high energy physics experiments. Scanning with a wide angle acceptance is crucial for obtaining track information in emulsion films. This study presents a new method developed for wide angle acceptance and high-speed track recognition of nuclear emulsion films for neutrino-nucleus interaction measurements. The nuclear emulsion technique can be used to measure tracks of charged particles from neutrino interactions with a low momentum threshold. The detection of the particles with a wide angle acceptance is essential for obtaining detailed information on the interactions in the sub- and multi-GeV neutrino energy region. In the new method developed for a neutrino interaction measurement in J-PARC called NINJA, the angle acceptance is covered up to $|\tan\theta_{x(y)}| < 5.0$ (80% of all solid angles) with $150\,\mathrm{m^2/year}$. This method can also be used to improve the angle accuracy and recognition efficiency of the tracks., Comment: 20 pages, 17 figures
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- 2022
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35. Proteasome and Apoptosis
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Tanaka, K., Kawahara, H., von der Helm, Klaus, editor, Korant, Bruce D., editor, and Cheronis, John C., editor
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- 2000
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36. A novel nuclear emulsion detector for measurement of quantum states of ultracold neutrons in the Earth's gravitational field
- Author
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Muto, N., primary, Abele, H., additional, Ariga, T., additional, Bosina, J., additional, Hino, M., additional, Hirota, K., additional, Ichikawa, G., additional, Jenke, T., additional, Kawahara, H., additional, Kawasaki, S., additional, Kitaguchi, M., additional, Micko, J., additional, Mishima, K., additional, Naganawa, N., additional, Nakamura, M., additional, Roccia, S., additional, Sato, O., additional, Sedmik, R.I.P., additional, Seki, Y., additional, Shimizu, H.M., additional, Tada, S., additional, and Umemoto, A., additional
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- 2022
- Full Text
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37. Effect of spontaneous Raman scattering on quantum channel wavelength-multiplexed with classical channel
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Kawahara, H., Medhipour, A., and Inoue, K.
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- 2011
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38. Effects of Polysaccharide Derived from Tea on Growth of Human Cell Lines in Serum Free Culture
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Kawahara, H., Maeda-Yamamoto, M., Osada, K., Tsuji, K., Merten, Otto-Wilhelm, editor, Perrin, Pierre, editor, and Griffiths, Bryan, editor
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- 2002
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39. Disturbed blood flow induces erosive injury to smooth muscle cell‐rich neointima and promotes thrombus formation in rabbit femoral arteries
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SUMI, T., YAMASHITA, A., MATSUDA, S., GOTO, S., NISHIHIRA, K., FURUKOJI, E., SUGIMURA, H., KAWAHARA, H., IMAMURA, T., KITAMURA, K., TAMURA, S., and ASADA, Y.
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- 2010
- Full Text
- View/download PDF
40. Ethanol-Induced Phosphorylation of Cytokeratins in Primary Cultured Hepatocytes
- Author
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French, Samuel W., Kawahara, H., Cadrin, M., and Palmer, T. Norman, editor
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- 1991
- Full Text
- View/download PDF
41. Peripherally administered ghrelin induces bimodal effects on the mesolimbic dopamine system depending on food-consumptive states
- Author
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Kawahara, Y., Kawahara, H., Kaneko, F., Yamada, M., Nishi, Y., Tanaka, E., and Nishi, A.
- Published
- 2009
- Full Text
- View/download PDF
42. The effectiveness of strict low-density lipoprotein cholesterol management in secondary prevention of Japanese patients
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Endo, A, primary, Yasuda, Y, additional, Kawahara, H, additional, Kagawa, Y, additional, Sakamoto, T, additional, Ouchi, T, additional, Watanabe, N, additional, Yamaguchi, K, additional, Yoshitomi, H, additional, and Tanabe, K, additional
- Published
- 2021
- Full Text
- View/download PDF
43. ORIGIN: metal creation and evolution from the cosmic dawn
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den Herder, Jan-Willem, Piro, Luigi, Ohashi, Takaya, Kouveliotou, Chryssa, Hartmann, Dieter H., Kaastra, Jelle S., Amati, L., Andersen, M. I., Arnaud, M., Attéia, J. -L., Bandler, S., Barbera, M., Barcons, X., Barthelmy, S., Basa, S., Basso, S., Boer, M., Branchini, E., Branduardi-Raymont, G., Borgani, S., Boyarsky, A., Brunetti, G., Budtz-Jorgensen, C., Burrows, D., Butler, N., Campana, S., Caroli, E., Ceballos, M., Christensen, F., Churazov, E., Comastri, A., Colasanti, L., Cole, R., Content, R., Corsi, A., Costantini, E., Conconi, P., Cusumano, G., de Plaa, J., De Rosa, A., Del Santo, M., Di Cosimo, S., De Pasquale, M., Doriese, R., Ettori, S., Evans, P., Ezoe, Y., Ferrari, L., Finger, H., Figueroa-Feliciano, T., Friedrich, P., Fujimoto, R., Furuzawa, A., Fynbo, J., Gatti, F., Galeazzi, M., Gehrels, N., Gendre, B., Ghirlanda, G., Ghisellini, G., Gilfanov, M., Giommi, P., Girardi, M., Grindlay, J., Cocchi, M., Godet, O., Guedel, M., Haardt, F., den Hartog, R., Hepburn, I., Hermsen, W., Hjorth, J., Hoekstra, H., Holland, A., Hornstrup, A., van der Horst, A., Hoshino, A., in ’t Zand, J., Irwin, K., Ishisaki, Y., Jonker, P., Kitayama, T., Kawahara, H., Kawai, N., Kelley, R., Kilbourne, C., de Korte, P., Kusenko, A., Kuvvetli, I., Labanti, M., Macculi, C., Maiolino, R., Hesse, M. Mas, Matsushita, K., Mazzotta, P., McCammon, D., Méndez, M., Mignani, R., Mineo, T., Mitsuda, K., Mushotzky, R., Molendi, S., Moscardini, L., Natalucci, L., Nicastro, F., O’Brien, P., Osborne, J., Paerels, F., Page, M., Paltani, S., Pedersen, K., Perinati, E., Ponman, T., Pointecouteau, E., Predehl, P., Porter, S., Rasmussen, A., Rauw, G., Röttgering, H., Roncarelli, M., Rosati, P., Quadrini, E., Ruchayskiy, O., Salvaterra, R., Sasaki, S., Sato, K., Savaglio, S., Schaye, J., Sciortino, S., Shaposhnikov, M., Sharples, R., Shinozaki, K., Spiga, D., Sunyaev, R., Suto, Y., Takei, Y., Tanvir, N., Tashiro, M., Tamura, T., Tawara, Y., Troja, E., Tsujimoto, M., Tsuru, T., Ubertini, P., Ullom, J., Ursino, E., Verbunt, F., van de Voort, F., Viel, M., Wachter, S., Watson, D., Weisskopf, M., Werner, N., White, N., Willingale, R., Wijers, R., Yamasaki, N., Yoshikawa, K., and Zane, S.
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- 2012
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44. Vibrational excitation functions for inelastic and superelastic electron scattering from the ground-electronic state in hot [formula omitted]
- Author
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Kato, H., Kawahara, H., Hoshino, M., Tanaka, H., Campbell, L., and Brunger, M.J.
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- 2008
- Full Text
- View/download PDF
45. Histopathologic findings in patients with idiopathic megacolon: a comparison between dilated and non-dilated loops
- Author
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Ohkubo, H., Masaki, T., Matsuhashi, N., Kawahara, H., Yokoyama, T., Nakajima, A., and Ohkura, Y.
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- 2014
- Full Text
- View/download PDF
46. EDGE: Explorer of diffuse emission and gamma-ray burst explosions
- Author
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Piro, L., den Herder, J. W., Ohashi, T., Amati, L., Atteia, J. L., Barthelmy, S., Barbera, M., Barret, D., Basso, S., Boer, M., Borgani, S., Boyarskiy, O., Branchini, E., Branduardi-Raymont, G., Briggs, M., Brunetti, G., Budtz-Jorgensen, C., Burrows, D., Campana, S., Caroli, E., Chincarini, G., Christensen, F., Cocchi, M., Comastri, A., Corsi, A., Cotroneo, V., Conconi, P., Colasanti, L., Cusumano, G., de Rosa, A., Del Santo, M., Ettori, S., Ezoe, Y., Ferrari, L., Feroci, M., Finger, M., Fishman, G., Fujimoto, R., Galeazzi, M., Galli, A., Gatti, F., Gehrels, N., Gendre, B., Ghirlanda, G., Ghisellini, G., Giommi, P., Girardi, M., Guzzo, L., Haardt, F., Hepburn, I., Hermsen, W., Hoevers, H., Holland, A., in’t Zand, J., Ishisaki, Y., Kawahara, H., Kawai, N., Kaastra, J., Kippen, M., de Korte, P. A. J., Kouveliotou, C., Kusenko, A., Labanti, C., Lieu, R., Macculi, C., Makishima, K., Matt, G., Mazzotta, P., McCammon, D., Méndez, M., Mineo, T., Mitchell, S., Mitsuda, K., Molendi, S., Moscardini, L., Mushotzky, R., Natalucci, L., Nicastro, F., O’Brien, P., Osborne, J., Paerels, F., Page, M., Paltani, S., Pareschi, G., Perinati, E., Perola, C., Ponman, T., Rasmussen, A., Roncarelli, M., Rosati, P., Ruchayskiy, O., Quadrini, E., Sakurai, I., Salvaterra, R., Sasaki, S., Sato, G., Schaye, J., Schmitt, J., Sciortino, S., Shaposhnikov, M., Shinozaki, K., Spiga, D., Suto, Y., Tagliaferri, G., Takahashi, T., Takei, Y., Tawara, Y., Tozzi, P., Tsunemi, H., Tsuru, T., Ubertini, P., Ursino, E., Viel, M., Vink, J., White, N., Willingale, R., Wijers, R., Yoshikawa, K., and Yamasaki, N.
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- 2009
- Full Text
- View/download PDF
47. Cross-sectional TEM analysis of laser-induced ripple structures on the 4H–SiC single-crystal surface
- Author
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Okada, T., Kawahara, H., Ishida, Y., Kumai, R., Tomita, T., Matsuo, S., Hashimoto, S., Kawamoto, M., Makita, Y., and Yamaguchi, M.
- Published
- 2008
- Full Text
- View/download PDF
48. POS1348 MORTALITY AND ITS RELATED FACTORS IN PATIENTS WITH IGG4-RELATED DISEASE: A JAPANESE SINGLE-CENTER STUDY
- Author
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Mizushima, I., primary, Kawahara, H., additional, Yoshinobu, T., additional, Shin, S., additional, Hoshiba, R., additional, Nishioka, R., additional, Zoshima, T., additional, Hara, S., additional, Suzuki, Y., additional, Ito, K., additional, and Kawano, M., additional
- Published
- 2021
- Full Text
- View/download PDF
49. First measurement of <math><msub><mover><mi>ν</mi><mo>¯</mo></mover><mi>μ</mi></msub></math> and <math><msub><mi>ν</mi><mi>μ</mi></msub></math> charged-current inclusive interactions on water using a nuclear emulsion detector
- Author
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Hiramoto, A., Suzuki, Y., Ali, A., Aoki, Shigeki, Berns, L., Fukuda, T., Hanaoka, Y., Hayato, Y., Ichikawa, A. K., Kawahara, H., Kikawa, T., Koga, T., Komatani, R., Komatsu, M., Kosakai, Y., Matsuo, T., Mikado, S., Minamino, A., Mizuno, K., Morimoto, Y., Morishima, K., Naganawa, N., Naiki, M., Nakamura, M., Nakamura, Y., Nakano, N., Nakano, T., Nakaya, T., Nishio, A., Odagawa, T., Ogawa, S., Oshima, H., Rokujo, H., Sanjana, I., Sato, O., Shibuya, H., Sugimura, K., Suzui, L., Takagi, H., Takao, T., Tanihara, Y., Yasutome, K., and Yokoyama, M.
- Subjects
Physics::Instrumentation and Detectors ,Nuclear Theory ,High Energy Physics::Experiment ,Nuclear Experiment - Abstract
This paper reports the track multiplicity and kinematics of muons, charged pions, and protons from charged-current inclusive ν¯μ and νμ interactions on a water target, measured using a nuclear emulsion detector in the NINJA experiment. A 3-kg water target was exposed to the T2K antineutrino-enhanced beam corresponding to 7.1×1020 protons on target with a mean energy of 1.3 GeV. Owing to the high granularity of the nuclear emulsion, protons with momenta down to 200 MeV/c from the neutrino-water interactions were detected. We find good agreement between the observed data and model predictions for all kinematic distributions other than the number of charged pions and the muon kinematics shapes. These results demonstrate the capability of measurements with nuclear emulsion to improve neutrino interaction models.
- Published
- 2020
50. First measurement of ν¯μ and νμ charged-current inclusive interactions on water using a nuclear emulsion detector
- Author
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Hiramoto, A., Suzuki, Y., Ali, A., Aoki, S., Berns, L., Fukuda, T., Hanaoka, Y., Hayato, Y., Ichikawa, A. K., Kawahara, H., Kikawa, T., Koga, T., Komatani, R., Komatsu, M., Kosakai, Y., Matsuo, T., Mikado, S., Minamino, A., Mizuno, K., Morimoto, Y., Morishima, K., Naganawa, N., Naiki, M., Nakamura, M., Nakamura, Y., Nakano, N., Nakano, T., Nakaya, T., Nishio, A., Odagawa, T., Ogawa, S., Oshima, H., Rokujo, H., Sanjana, I., Sato, O., Shibuya, H., Sugimura, K., Suzui, L., Takagi, H., Takao, T., Tanihara, Y., Yasutome, K., Yokoyama, M., and NINJA Collaboration
- Subjects
Physics::Instrumentation and Detectors ,Nuclear Theory ,High Energy Physics::Experiment ,Nuclear Experiment - Abstract
This paper reports the track multiplicity and kinematics of muons, charged pions, and protons from charged-current inclusive ¯νμ and νμ interactions on a water target, measured using a nuclear emulsion detector in the NINJA experiment. A 3-kg water target was exposed to the T2K antineutrino-enhanced beam corresponding to 7.1×1020 protons on target with a mean energy of 1.3 GeV. Owing to the high granularity of the nuclear emulsion, protons with momenta down to 200 MeV/c from the neutrino-water interactions were detected. We find good agreement between the observed data and model predictions for all kinematic distributions other than the number of charged pions and the muon kinematics shapes. These results demonstrate the capability of measurements with nuclear emulsion to improve neutrino interaction models., 精密測定により素粒子ニュートリノの謎の解明を目指すNINJA実験の物理解析が開始. 京都大学プレスリリース. 2020-10-21.
- Published
- 2020
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