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1,619 results on '"Okuyama K"'

1. Electroproduction of the Lambda/Sigma^0 hyperons at Q^2~0.5 (GeV/c)^2 at forward angles

Author

Okuyama, K., Itabashi, K., Nagao, S., Nakamura, S. N., Suzuki, K. N., Gogami, T., Pandey, B., Tang, L., Bydžovský, P., Skoupil, D., Mart, T., Abrams, D., Akiyama, T., Androic, D., Aniol, K., Gayoso, C. Ayerbe, Bane, J., Barcus, S., Barrow, J., Bellini, V., Bhatt, H., Bhetuwal, D., Biswas, D., Camsonne, A., Castellanos, J., Chen, J-P., Chen, J., Covrig, S., Chrisman, D., Cruz-Torres, R., Das, R., Fuchey, E., Gnanvo, K., Garibaldi, F., Gautam, T., Gomez, J., Gueye, P., Hague, T. J., Hansen, O., Henry, W., Hauenstein, F., Higinbotham, D. W., Hyde, C. E., Kaneta, M., Keppel, C., Kutz, T., Lashley-Colthirst, N., Li, S., Liu, H., Mammei, J., Markowitz, P., McClellan, R. E., Meddi, F., Meekins, D., Michaels, R., Mihovilovič, M., Moyer, A., Nguyen, D., Nycz, M., Owen, V., Palatchi, C., Park, S., Petkovic, T., Premathilake, S., Reimer, P. E., Reinhold, J., Riordan, S., Rodriguez, V., Samanta, C., Santiesteban, S. N., Sawatzky, B., Širca, S., Slifer, K., Su, T., Tian, Y., Toyama, Y., Uehara, K., Urciuoli, G. M., Votaw, D., Williamson, J., Wojtsekhowski, B., Wood, S. A., Yale, B., Ye, Z., Zhang, J., and Zheng, X.

Subjects
Nuclear Experiment
Abstract

In 2018, the E12-17-003 experiment was conducted at the Thomas Jefferson National Accelerator Facility (JLab) to explore the possible existence of an nnLambda state in the reconstructed missing mass distribution from a tritium gas target [K. N. Suzuki et al., Prog. Theor. Exp. Phys. 2022, 013D01 (2022), B. Pandey et al., Phys. Rev. C 105, L051001 (2022)]. As part of this investigation, data was also collected using a gaseous hydrogen target, not only for a precise absolute mass scale calibration but also for the study of Lambda/Sigma^0 electroproduction. This dataset was acquired at Q^2~0.5 (GeV/c)^2, W=2.14 GeV, and theta_{gamma K}^{c.m.}~8 deg. It covers forward angles where photoproduction data is scarce and a low-Q^2 region that is of interest for hypernuclear experiments. On the other hand, this kinematic region is at a slightly higher Q^2 than previous hypernuclear experiments, thus providing crucial information for understanding the Q^2 dependence of the differential cross sections for Lambda/Sigma^0 hyperon electroproduction. This paper reports on the Q^2 dependence of the differential cross section for the e + p -> e' + K^+ + Lambda/Sigma^0 reaction in the 0.2-0.8 (GeV/c)^2, and provides comparisons with the currently available theoretical models., Comment: 11 pages, 15 figures

Published
2024

2. High accuracy spectroscopy of 3- and 4-body Λ hypernuclei at Jefferson Lab

Author

Gogami T., Achenbach P., Akiyama T., Androic D., Asaturyan A., Brash E., Bukhari M. H., Camsonne A., Covrig Dusa S., Ebata K., Elaasar M. A., Fujii Y., Fujiwara T., Furic M., Garibaldi F., Gueye P., Higinbotham D. W., Ishige T., Itabashi K., Kaneta M., Kino R., Lashley N., Markowitz P., Meekins D., Mizuno M., Mkrtchyan H. G., Mkrtchyan A. H., Nagafusa S., Nagano S., Nagao S., Nakamura S. N., Nakamura Y. R., Niculescu G., Niculescu I., Okuyama K., Pandey B., Pochodzalla J., Reinhold J., Rodriguez V. M., Samanta C., Sawatzky B., Shabestari M. H., Shahinyan A., Sirca S., Suzuki K. N., Tachibana K., Tang L., Toyama Y., Tsutsumi K., Uehara K., Umezaki E., Urciuoli G. M., Watanabe D., and Wood S. A.

Subjects
Physics, QC1-999
Abstract

JLab E12-19-002 Experiment is planned to measure the Λ-binding energies of 3ΛH [Jπ = 1/2+ or 3/2+(T = 0)] and 4ΛH (1+) at JLab Hall C. The expected accuracy for the binding-energy measurement is |ΔBtotal Λ | ≃ 70 keV. The accurate spectroscopy for these light hypernuclei would shed light on the puzzle of the small binding energy and short lifetime of 3ΛH, and the chargesymmetry breaking in the ΛN interaction. We aim to perform the experiment in 2025.

Published
2022
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3. Cross-section measurement of virtual photoproduction of iso-triplet three-body hypernucleus, Λnn

Author

Gogami T., Suzuki K. N., Pandey B., Itabashi K., Nagao S., Okuyama K., Nakamura S. N., Tang L., Abrams D., Akiyama T., Androic D., Aniol K., Ayerbe Gayoso C., Bane J., Barcus S., Barrow J., Bellini V., Bhatt H., Bhetuwal D., Biswas D., Camsonne A., Castellanos J., Chen J-P., Chen J., Covrig S., Chrisman D., Cruz-Torres R., Das R., Fuchey E., Gnanvo K., Garibaldi F., Gautam T., Gomez J., Gueye P., Hague T. J., Hansen O., Henry W., Hauenstein F., Higinbotham D. W., Hyde C. E., Kaneta M., Keppel C., Kutz T., Lashley-Colthirst N., Li S., Liu H., Mammei J., Markowitz P., McClellan R. E., Meddi F., Meekins D., Michaels R., Mihovilovic M., Moyer A., Nguyen D., Nycz M., Owen V., Palatchi C., Park S., Petkovic T., Premathilake S., Reimer P. E., Reinhold J., Riordan S., Rodriguez V., Samanta C., Santiesteban S. N., Sawatzky B., Širca S., Slifer K., Su T., Tian Y., Toyama Y., Uehara K., Urciuoli G. M., Votaw D., Williamson J., Wojtsekhowski B., Wood S. A., Yale B., Ye Z., Zhang J., and Zheng X.

Subjects
Physics, QC1-999
Abstract

Missing-mass spectroscopy with the 3H(e, e′K+) reaction was carried out at Jefferson Lab’s (JLab) Hall A in Oct–Nov, 2018. The differential cross section for the 3H(γ∗, K+)Λnn was deduced at ω = Ee − Ee′ = 2.102 GeV and at the forward K+-scattering angle (0° ≤ θγ∗K ≤ 5°) in the laboratory frame. Given typical predicted energies and decay widths, which are (BΛ, Γ) = (−0.25, 0.8) and (−0.55, 4.7) MeV, the cross sections were found to be 11.2 ± 4.8(stat.)+4.1−2.1(sys.) and 18.1 ± 6.8(stat.)+4.2−2.9(sys.) nb/sr, respectively. The obtained result would impose a constraint for interaction models particularly between Λ and neutron by comparing to theoretical calculations.

Published
2022
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4. Study of the Λ/Σ0 electroproduction in the low-Q2 region at JLab

Author

Okuyama K., Itabashi K., Nagao S., Nakamura S. N., Suzuki K. N., Gogami T., Pandey B., Tang L., Abrams D., Akiyama T., Androic D., Aniol K., Ayerbe Gayoso C., Bane J., Barcus S., Barrow J., Bellini V., Bhatt H., Bhetuwal D., Biswas D., Camsonne A., Castellanos J., Chen J-P., Chen J., Covrig S., Chrisman D., Cruz-Torres R., Das R., Fuchey E., Gnanvo K., Garibaldi F., Gautam T., Gomez J., Gueye P., Hague T. J., Hansen O., Henry W., Hauenstein F., Higinbotham D. W., Hyde C. E., Kaneta M., Keppel C., Kutz T., Lashley-Colthirst N., Li S., Liu H., Mammei J., Markowitz P., McClellan R. E., Meddi F., Meekins D., Michaels R., Mihovilovic M., Moyer A., Nguyen D., Nycz M., Owen V., Palatchi C., Park S., Petkovic T., Premathilake S., Reimer P. E., Reinhold J., Riordan S., Rodriguez V., Samanta C., Santiesteban S. N., Sawatzky B., Širca S., Slifer K., Su T., Tian Y., Toyama Y., Uehara K., Urciuoli G. M., Votaw D., Williamson J., Wojtsekhowski B., Wood S. A., Yale B., Ye Z., Zhang J., and Zheng X.

Subjects
Physics, QC1-999
Abstract

We performed an experiment using tritium and hydrogen cryogenic gas targets at Thomas Jefferson National Accelerator Facility (JLab) in 2018 (E12-17-003)[1, 2]. In this article, we discuss the Λ/Σ0 hyperon electroproduction from hydrogen target. Elementary Λ/Σ0 hyperon production processes are important not only for an absolute mass scale calibration in our experiment, but also for the study of the electroproduction mechanisms themselves. In this article, we reported the results of the differential cross section for the p(e, e’K+)Λ/Σ0 reaction at Q2 ∼ 0.5 (GeV/c)2.

Published
2022
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5. Study of Λn FSI with Λ quasi-free productions on the 3H(e, e′K+)X reaction at JLab

Author

Itabashi K., Suzuki K.N., Pandey B., Okuyama K., Gogami T., Nagao S., Nakamura S.N., Tang L., Abrams D., Akiyama T., Androic D., Aniol K., Ayerbe Gayoso C., Bane J., Barcus S., Barrow J., Bellini V., Bhatt H., Bhetuwal D., Biswas D., Camsonne A., Castellanos J., Chen J-P., Chen J., Covrig S., Chrisman D., Cruz-Torres R., Das R., Fuchey E., Gnanvo K., Garibaldi F., Gautam T., Gomez J., Gueye P., Hague T.J., Hansen O., Henry W., Hauenstein F., Higinbotham D.W., Hyde C.E., Kaneta M., Keppel C., Kutz T., Lashley-Colthirst N., Li S., Liu H., Mammei J., Markowitz P., McClellan R. E., Meddi F., Meekins D., Michaels R., Mihovilovic M., Moyer A., Nguyen D., Nycz M., Owen V., Palatchi C., Park S., Petkovic T., Premathilake S., Reimer P.E., Reinhold J., Riordan S., Rodriguez V., Samanta C., Santiesteban S.N., Sawatzky B., Širca S., Slifer K., Su T., Tian Y., Toyama Y., Uehara K., Urciuoli G.M., Votaw D., Williamson J., Wojtsekhowski B., Wood S.A., Yale B., Ye Z., Zhang J., and Zheng X.

Subjects
Physics, QC1-999
Abstract

Abstract. An nnΛ is a neutral baryon system with no charge. The study of the pure Λ-neutron system such as nnΛ gives us information on the Λn interaction. The nnΛ search experiment (E12-17-003) was performed at JLab Hall A in 2018. In this article, the Λn FSI was investigated by a shape analysis of the 3H(e, e′K+)X missing mass spectrum, and a preliminary result for the Λn FSI study is given.

Published
2022
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6. High accuracy synchrotron radiation interferometry with relativistic electrons

Author

Klag, P., Achenbach, P., Akiyama, T., Böhm, R., Distler, M. O., Doria, L., Eckert, P., Esser, A., Geratz, J., Gogami, T., Helmel, C., Herrmann, P., Hoek, M, Kaneta, M., Konishi, Y., Kino, R., Lauth, W., Merkel, H., Mizuno, M., Müller, U., Nagao, S., Nakamura, S. N., Okuyama, K., Pochodzalla, J., Schlimme, B. S., Sfienti, C., Shao, T., Steinen, M., Stengel, S., Thiel, M., and Toyama, Y.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment, Physics - Accelerator Physics
Abstract

A high-precision hypernuclear experiment has been performed at the Mainz Microtron (MAMI) to determine the hypertriton {\Lambda} binding energy via decay-pion spectroscopy. A key element of this measurement is an accurate calibration of the magnetic spectrometers with the MAMI beam. For such an absolute calibration with small statistical and systematic uncertainties the undulator light interference method will be applied. In this contribution the basic principle of this method is discussed and the analysis status of the measured synchrotron radiation spectra is presented, Comment: The 13th Biennial Conference on Classical and Quantum Relativistic Dynamics of Particles and Fields (IARD22)

Published
2022
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8. Systematic treatment of hypernuclear data and application to the hypertriton

Author

Eckert, P., Achenbach, P., Fontbote, M. Aragones, Akiyama, T., Distler, M. O., Esser, A., Geratz, J., Hoek, M., Itabashi, K., Kaneta, M., Kino, R., Klag, P., Merkel, H., Mizuno, M., Müller, J., Müller, U., Nagao, S., Nakamura, S. N., Nakamura, Y. R., Okuyama, K., Pochodzalla, J., Schlimme, B. S., Sfienti, C., Spreckels, R., Steinen, M., Tachibana, K., Thiel, M., Uehara, K., and Toyama, Y.

Subjects
Physics - Data Analysis, Statistics and Probability, Nuclear Experiment
Abstract

A database is under construction to provide a complete collection of published basic properties of hypernuclei such as {\Lambda} binding energies, lifetimes, or excitation energies. From these values, averages with related errors are computed in a systematic way. For each property, the overall experimental situation is depicted in form of an ideogram showing the combined probability density function of the measurements. The database is accessible via a dynamic website at https://hypernuclei.kph.uni-mainz.de with an user interface offering customizable visualizations, selections, or unit conversions. The capabilities of the database are demonstrated for the puzzling and disputed data situation of the hypertriton., Comment: 6 pages, 3 figures, HADRON 2021 Proceeding

Published
2022

9. The cross-section measurement for the $^3{\textrm H}(e,e'K^+)nn\Lambda$ reaction

Author

Suzuki, K. N., Gogami, T., Pandey, B., Itabashi, K., Nagao, S., Okuyama, K., Nakamura, S. N., Tang, L., Abrams, D., Akiyama, T., Androic, D., Aniol, K., Gayoso, C. Ayerbe, Bane, J., Barcus, S., Barrow, J., Bellini, V., Bhatt, H., Bhetuwal, D., Biswas, D., Camsonne, A., Castellanos, J., Chen, J-P., Chen, J., Covrig, S., Chrisman, D., Cruz-Torres, R., Das, R., Fuchey, E., Gnanvo, K., Garibaldi, F., Gautam, T., Gomez, J., Gueye, P., Hague, T. J., Hansen, O., Henry, W., Hauenstein, F., Higinbotham, D. W., Hyde, C. E., Kaneta, M., Keppel, C., Kutz, T., Lashley-Colthirst, N., Li, S., Liu, H., Mammei, J., Markowitz, P., McClellan, R. E., Meddi, F., Meekins, D., Michaels, R., Mihovilovič, M., Moyer, A., Nguyen, D., Nycz, M., Owen, V., Palatchi, C., Park, S., Petkovic, T., Premathilake, S., Reimer, P. E., Reinhold, J., Riordan, S., Rodriguez, V., Samanta, C., Santiesteban, S. N., Sawatzky, B., Širca, S., Slifer, K., Su, T., Tian, Y., Toyama, Y., Uehara, K., Urciuoli, G. M., Votaw, D., Williamson, J., Wojtsekhowski, B., Wood, S. A., Yale, B., Ye, Z., Zhang, J., and Zheng, X.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The small binding energy of the hypertrition leads to predictions of non-existence of bound hypernuclei for isotriplet three-body systems such as $nn\Lambda$. However, invariant mass spectroscopy at GSI has reported events that may be interpreted as the bound $nn\Lambda$ state. The $nn\Lambda$ state was sought by missing-mass spectroscopy via the $(e,e'K^+)$ reaction at Jefferson Lab's experimental Hall A. The present experiment has higher sensitivity to the $nn\Lambda$-state investigation in terms of better precision by a factor of about three. The analysis shown in this article focuses on the derivation of the reaction cross-section for the $^3{\rm{H}}(\gamma^{*},K^+)\textrm{X}$ reaction. Events that were detected in an acceptance, where a Monte Carlo simulation could reproduce the data well ($|\delta p/p| < 4\%$), were analyzed to minimize the systematic uncertainty. No significant structures were observed with the acceptance cuts, and the upper limits of the production cross-section of the $nn\Lambda$ state were obtained to be $21$ and $31~\rm{nb/sr}$ at the $90\%$ confidence level when theoretical predictions of $(-B_{\Lambda}, \Gamma) = (0.25,0.8)$ and $(0.55, 4.7)$ MeV, respectively, were assumed. The cross-section result provides valuable information for examining the existence of $nn\Lambda$., Comment: 27 pages, 12 figures

Published
2021
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10. Spectroscopic study of a possible Λnn resonance and a pair of ΣNN states using the (e,e′K+) reaction with a tritium target

Author

Pandey, B, Tang, L, Gogami, T, Suzuki, KN, Itabashi, K, Nagao, S, Okuyama, K, Nakamura, SN, Abrams, D, Afnan, IR, Akiyama, T, Androic, D, Aniol, K, Averett, T, Gayoso, C Ayerbe, Bane, J, Barcus, S, Barrow, J, Bellini, V, Bhatt, H, Bhetuwal, D, Biswas, D, Camsonne, A, Castellanos, J, Chen, J-P, Chen, J, Covrig, S, Chrisman, D, Cruz-Torres, R, Das, R, Fuchey, E, Gal, C, Gibson, BF, Gnanvo, K, Garibaldi, F, Gautam, T, Gomez, J, Gueye, P, Hague, TJ, Hansen, O, Henry, W, Hauenstein, F, Higinbotham, DW, Hyde, C, Kaneta, M, Keppel, C, Kutz, T, Lashley-Colthirst, N, Li, S, Liu, H, Mammei, J, Markowitz, P, McClellan, RE, Meddi, F, Meekins, D, Michaels, R, Mihovilovič, M, Moyer, A, Nguyen, D, Nycz, M, Owen, V, Palatchi, C, Park, S, Petkovic, T, Premathilake, S, Reimer, PE, Reinhold, J, Riordan, S, Rodriguez, V, Samanta, C, Santiesteban, SN, Sawatzky, B, Širca, S, Slifer, K, Su, T, Tian, Y, Toyama, Y, Uehara, K, Urciuoli, GM, Votaw, D, Williamson, J, Wojtsekhowski, B, Wood, S, Yale, B, Ye, Z, Zhang, J, and Zheng, X

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Nuclear and plasma physics
Abstract

A mass spectroscopy experiment with a pair of nearly identical high-resolution spectrometers and a tritium target was performed in Hall A at Jefferson Lab. Utilizing the (e,e′K+) reaction, enhancements, which may correspond to a possible Λnn resonance and a pair of ςNN states, were observed with an energy resolution of about 1.21 MeV (σ), although greater statistics are needed to make definitive identifications. An experimentally measured Λnn state may provide a unique constraint in determining the Λn interaction, for which no scattering data exist. In addition, although bound A=3 and 4 ς hypernuclei have been predicted, only an A=4 ς hypernucleus (Heς4) was found, utilizing the (K-,π-) reaction on a He4 target. The possible bound ςNN state is likely a ς0nn state, although this has to be confirmed by future experiments.

Published
2022

11. The cross-section measurement for the 3H(e, e′K+)nnΛ reaction

Author

Suzuki, KN, Gogami, T, Pandey, B, Itabashi, K, Nagao, S, Okuyama, K, Nakamura, SN, Tang, L, Abrams, D, Akiyama, T, Androic, D, Aniol, K, Gayoso, C Ayerbe, Bane, J, Barcus, S, Barrow, J, Bellini, V, Bhatt, H, Bhetuwal, D, Biswas, D, Camsonne, A, Castellanos, J, Chen, J-P, Chen, J, Covrig, S, Chrisman, D, Cruz-Torres, R, Das, R, Fuchey, E, Gnanvo, K, Garibaldi, F, Gautam, T, Gomez, J, Gueye, P, Hague, TJ, Hansen, O, Henry, W, Hauenstein, F, Higinbotham, DW, Hyde, CE, Kaneta, M, Keppel, C, Kutz, T, Lashley-Colthirst, N, Li, S, Liu, H, Mammei, J, Markowitz, P, McClellan, RE, Meddi, F, Meekins, D, Michaels, R, Mihovilovič, M, Moyer, A, Nguyen, D, Nycz, M, Owen, V, Palatchi, C, Park, S, Petkovic, T, Premathilake, S, Reimer, PE, Reinhold, J, Riordan, S, Rodriguez, V, Samanta, C, Santiesteban, SN, Sawatzky, B, Širca, S, Slifer, K, Su, T, Tian, Y, Toyama, Y, Uehara, K, Urciuoli, GM, Votaw, D, Williamson, J, Wojtsekhowski, B, Wood, SA, Yale, B, Ye, Z, Zhang, J, and Zheng, X

Subjects
Mathematical Sciences, Physical Sciences
Abstract

The small binding energy of the hypertriton leads to predictions of the non-existence of bound hypernuclei for isotriplet three-body systems such as nnΛ. However, invariant mass spectroscopy at GSI has reported events that may be interpreted as the bound nnΛ state. The nnΛ state was sought by missing-mass spectroscopy via the (e, e′K+) reaction at Jefferson Lab's experimental Hall A. The present experiment has higher sensitivity to the nnΛ-state investigation in terms of better precision by a factor of about three. The analysis shown in this article focuses on the derivation of the reaction cross-section for the 3H(γ∗, K+)X reaction. Events that were detected in an acceptance, where a Monte Carlo simulation could reproduce the data well (δ p/p| < 4), were analyzed to minimize the systematic uncertainty. No significant structures were observed with the acceptance cuts, and the upper limits of the production cross-section of the nnΛ state were obtained to be 21 and 31 nb sr-1 at the $90\%$ confidence level when theoretical predictions of (-BΛ, Γ) = (0.25, 0.8) MeV and (0.55, 4.7) MeV, respectively, were assumed. The cross-section result provides valuable information for examining the existence of nnΛ.

Published
2022

12. The spectrometer and target systems for hypernuclear physics at the Mainz Microtron

Author

Achenbach, P., Akiyama, T., Distler, M.O., Eckert, P., Esser, A., Geratz, J., Hoek, M., Itabashi, K., Kaneta, M., Kino, R., Klag, P., Merkel, H., Mizuno, M., Müller, J., Müller, U., Nagao, S., Nakamura, S.N., Nakamura, Y.R., Okuyama, K., Pochodzalla, J., Schlimme, B.S., Sfienti, C., Spreckels, R., Steinen, M., Tachibana, K., Thiel, M., Uehara, K., and Toyama, Y.

Published
2022
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13. Targeted Up-Conditioning of Contralesional Corticospinal Pathways Promotes Motor Recovery in Poststroke Patients with Severe Chronic Hemiplegia

Author

Takasaki, K., Liu, F., Ogura, M., Okuyama, K., Kawakami, M., Mizuno, K., Kasuga, S., Noda, T., Morimoto, J., Liu, M., Ushiba, J., Gan, Woon-Seng, Series Editor, Kuo, C.-C. Jay, Series Editor, Zheng, Thomas Fang, Series Editor, Barni, Mauro, Series Editor, Guger, Christoph, editor, Mrachacz-Kersting, Natalie, editor, and Allison, Brendan Z., editor

Published
2019
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14. Study of the nnΛΛn State and nnΛΛn Interaction at Jefferson Lab

Author

Itabashi, K., Akiyama, T., Fujii, Y., Fujiwara, T., Garibaldi, F., Gogami, T., Kaneta, M., Katayama, K., Markowitz, P. E. C., Maeda, K., Mizuno, M., Nagao, S., Nakamura, S. N., Nakamura, Y. R., Okuyama, K., Pandey, B., Reinhold, J., Suzuki, K. N., Tang, L., Toyama, Y., Toyoda, T., Uehara, K., Umezaki, E., and Urciuoli, G. M.

Published
2022
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16. Effects of titanium fluoride on caries inhibition and elemental distribution in the tooth structure: Comparisons with sodium fluoride at the same fluoride concentration and pH values

Author

Okuyama, K., primary, Shintani, K., additional, Tamaki, Y., additional, Matsuda, Y., additional, Sakurai, M., additional, Saito, T., additional, Yamamoto, H., additional, Naito, K., additional, Kanda, H., additional, Hayashi, M., additional, Satoh, T., additional, Yamada, N., additional, Yamagata, R., additional, and Ishii, Y., additional

Published
2023
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18. High accuracy synchrotron radiation interferometry with relativistic electrons

Author

Klag, P, primary, Achenbach, P, additional, Akiyama, T, additional, Böhm, R, additional, Distler, M O, additional, Doria, L, additional, Eckert, P, additional, Esser, A, additional, Geratz, J, additional, Gogami, T, additional, Helmel, C, additional, Herrmann, P, additional, Hoek, M, additional, Kaneta, M, additional, Konishi, Y, additional, Kino, R, additional, Lauth, W, additional, Merkel, H, additional, Mizuno, M, additional, Müller, U, additional, Nagao, S, additional, Nakamura, S N, additional, Okuyama, K, additional, Pochodzalla, J, additional, Schlimme, B S, additional, Sfienti, C, additional, Shao, T, additional, Steinen, M, additional, Stengel, S, additional, Thiel, M, additional, and Toyama, Y, additional

Published
2023
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19. 843 Atypical epidermolytic palmoplantar keratoderma is a mild phenotypic variant of epidermolytic ichthyosis: A new proposal from ultrastructural observations and pro-inflammatory cytokine analyses

Author

Ansai, O., primary, Hayashi, R., additional, Katsumi, T., additional, Miyauchi, T., additional, Okuyama, K., additional, Shibata, S., additional, Shinkuma, S., additional, Natsuga, K., additional, Nomura, T., additional, Abe, R., additional, and Ito, M., additional

Published
2023
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22. Prognostic Impact of Right Ventricular Dysfunction Following Transcatheter Mitral Valve Repair

Author

Toshiki Kaihara, Tomoo Harada, Masashi Koga, S. Doi, Shingo Kuwata, Izumo M, Hiroyuki Nishikawa, Yukio S, Shiokawa n, Kamijima R, Yoshihiro J. Akashi, Okuyama K, Yuki Ishibashi, and Yasuhiro Tanabe

Subjects
medicine.medical_specialty, Text mining, business.industry, Internal medicine, medicine, Cardiology, Transcatheter mitral valve repair, business, Right ventricular dysfunction
Abstract

Background Little is known regarding the impact of right ventricular (RV) function on clinical outcomes following MitraClip therapy. Objectives The aim of this study was to investigate the prognostic impact of RV dysfunction and its cut-off value following MitraClip therapy. Methods Consecutive 77 patients (median 79 years, 33% female) who underwent MitraClip therapy were enrolled. Clinical endpoint was defined as cardiovascular (CV) events, including cardiovascular death and rehospitalization for heart failure (HF). Results and conclusions Twenty-two (29%) patients had primary mitral regurgitation (MR). During follow-up, 5 patients died due to CV events, 8 were hospitalized for HF. On univariate Cox regression analysis, CV events were associated with eGFR (HR; 0.960, 95% CI; 0.926–0.995, p = 0.027), tricuspid annular plane systolic excursion (TAPSE, HR; 0.874, 95% CI; 0.789–0.968, p = 0.010), and significant residual MR (HR; 11.652, 95% CI; 3.257–41.691, p

Published
2022
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28. Systematic treatment of hypernuclear data and application to the hypertriton

Author

Eckert, Philipp, primary, Achenbach, P., additional, Aragonès Fontboté, M., additional, Akiyama, T., additional, Distler, M. O., additional, Esser, A., additional, Geratz, J., additional, Hoek, M., additional, Itabashi, K., additional, Kaneta, M., additional, Kino, R., additional, Klag, P., additional, Merkel, H., additional, Mizuno, M., additional, Müller, J., additional, Müller, U., additional, Nagao, S., additional, Nakamura, S. N., additional, Nakamura, Y. R., additional, Okuyama, K., additional, Pochodzalla, J., additional, Schlimme, B. S., additional, Sfienti, C., additional, Spreckels, R., additional, Steinen, M., additional, Tachibana, K., additional, Thiel, M., additional, Toyama, Y., additional, and Uehara, K., additional

Published
2022
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29. This title is unavailable for guests, please login to see more information.

Author

20750368, Suzuki, K N, Gogami, T, Pandey, B, Itabashi, K, Nagao, S, Okuyama, K, Nakamura, S N, Tang, L, Abrams, D, Akiyama, T, Androic, D, Aniol, K, Gayoso, C Ayerbe, Bane, J, Barcus, S, Barrow, J, Bellini, V, Bhatt, H, Bhetuwal, D, Biswas, D, Camsonne, A, Castellanos, J, Chen, J-P, Chen, J, Covrig, S, Chrisman, D, Cruz-Torres, R, Das, R, Fuchey, E, Gnanvo, K, Garibaldi, F, Gautam, T, Gomez, J, Gueye, P, Hague, T J, Hansen, O, Henry, W, Hauenstein, F, Higinbotham, D W, Hyde, C E, Kaneta, M, Keppel, C, Kutz, T, Lashley-Colthirst, N, Li, S, Liu, H, Mammei, J, Markowitz, P, McClellan, R E, Meddi, F, Meekins, D, Michaels, R, Mihovilovič, M, Moyer, A, Nguyen, D, Nycz, M, Owen, V, Palatchi, C, Park, S, Petkovic, T, Premathilake, S, Reimer, P E, Reinhold, J, Riordan, S, Rodriguez, V, Samanta, C, Santiesteban, S N, Sawatzky, B, Širca, S, Slifer, K, Su, T, Tian, Y, Toyama, Y, Uehara, K, Urciuoli, G M, Votaw, D, Williamson, J, Wojtsekhowski, B, Wood, S A, Yale, B, Ye, Z, Zhang, J, Zheng, X, 20750368, Suzuki, K N, Gogami, T, Pandey, B, Itabashi, K, Nagao, S, Okuyama, K, Nakamura, S N, Tang, L, Abrams, D, Akiyama, T, Androic, D, Aniol, K, Gayoso, C Ayerbe, Bane, J, Barcus, S, Barrow, J, Bellini, V, Bhatt, H, Bhetuwal, D, Biswas, D, Camsonne, A, Castellanos, J, Chen, J-P, Chen, J, Covrig, S, Chrisman, D, Cruz-Torres, R, Das, R, Fuchey, E, Gnanvo, K, Garibaldi, F, Gautam, T, Gomez, J, Gueye, P, Hague, T J, Hansen, O, Henry, W, Hauenstein, F, Higinbotham, D W, Hyde, C E, Kaneta, M, Keppel, C, Kutz, T, Lashley-Colthirst, N, Li, S, Liu, H, Mammei, J, Markowitz, P, McClellan, R E, Meddi, F, Meekins, D, Michaels, R, Mihovilovič, M, Moyer, A, Nguyen, D, Nycz, M, Owen, V, Palatchi, C, Park, S, Petkovic, T, Premathilake, S, Reimer, P E, Reinhold, J, Riordan, S, Rodriguez, V, Samanta, C, Santiesteban, S N, Sawatzky, B, Širca, S, Slifer, K, Su, T, Tian, Y, Toyama, Y, Uehara, K, Urciuoli, G M, Votaw, D, Williamson, J, Wojtsekhowski, B, Wood, S A, Yale, B, Ye, Z, Zhang, J, and Zheng, X

Published
2022

31. Preparation of the hypertriton binding energy measurement at MAMI

Author

Eckert, Philipp, primary, Achenbach, Patrick, additional, Aragonès Fontboté, Marc, additional, Akiyama, T., additional, Distler, Michael Otto, additional, Esser, Anselm, additional, Geratz, Julian, additional, Hoek, Matthias, additional, Itabashi, K., additional, Kaneta, M, additional, Klag, Pascal, additional, Merkel, Harald, additional, Mizuno, M., additional, Müller, Julian, additional, Müller, Ulrich, additional, Nagao, Sho, additional, Nakamura, Satoshi Nue, additional, Nakamura, Y.R., additional, Okuyama, K., additional, Pochodzalla, Josef, additional, Sfienti, Concettina, additional, Spreckels, Rouven, additional, Steinen, Marcell, additional, Thiel, Michaela, additional, Uehara, K., additional, and Toyama, Yuichi, additional

Published
2022
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33. The cross-section measurement for the ³H(e, e′K⁺)nnΛ reaction

Author

Suzuki, K N, Gogami, T, Pandey, B, Itabashi, K, Nagao, S, Okuyama, K, Nakamura, S N, Tang, L, Abrams, D, Akiyama, T, Androic, D, Aniol, K, Gayoso, C Ayerbe, Bane, J, Barcus, S, Barrow, J, Bellini, V, Bhatt, H, Bhetuwal, D, Biswas, D, Camsonne, A, Castellanos, J, Chen, J-P, Chen, J, Covrig, S, Chrisman, D, Cruz-Torres, R, Das, R, Fuchey, E, Gnanvo, K, Garibaldi, F, Gautam, T, Gomez, J, Gueye, P, Hague, T J, Hansen, O, Henry, W, Hauenstein, F, Higinbotham, D W, Hyde, C E, Kaneta, M, Keppel, C, Kutz, T, Lashley-Colthirst, N, Li, S, Liu, H, Mammei, J, Markowitz, P, McClellan, R E, Meddi, F, Meekins, D, Michaels, R, Mihovilovič, M, Moyer, A, Nguyen, D, Nycz, M, Owen, V, Palatchi, C, Park, S, Petkovic, T, Premathilake, S, Reimer, P E, Reinhold, J, Riordan, S, Rodriguez, V, Samanta, C, Santiesteban, S N, Sawatzky, B, Širca, S, Slifer, K, Su, T, Tian, Y, Toyama, Y, Uehara, K, Urciuoli, G M, Votaw, D, Williamson, J, Wojtsekhowski, B, Wood, S A, Yale, B, Ye, Z, Zhang, J, and Zheng, X

Subjects
D14 Hypernuclei
Abstract

The small binding energy of the hypertriton leads to predictions of the non-existence of bound hypernuclei for isotriplet three-body systems such as nnΛ. However, invariant mass spectroscopy at GSI has reported events that may be interpreted as the bound nnΛ state. The nnΛ state was sought by missing-mass spectroscopy via the (e, e′K⁺) reaction at Jefferson Lab’s experimental HallA. The present experiment has higher sensitivity to the nnΛ-state investigation in terms of better precision by a factor of about three. The analysis shown in this article focuses on the derivation of the reaction cross-section for the ³H(γ*, K⁺)X reaction. Events that were detected in an acceptance, where a Monte Carlo simulation could reproduce the data well ($|delta p/p| lt 4%$), were analyzed to minimize the systematic uncertainty. No significant structures were observed with the acceptance cuts, and the upper limits of the production cross-section of the nnΛ state were obtained to be 21 and $31 , rm {nb} , rm {sr}^{-1}$ at the $90%$ confidence level when theoretical predictions of (−BΛ, Γ) = (0.25, 0.8) MeV and (0.55, 4.7) MeV, respectively, were assumed. The cross-section result provides valuable information for examining the existence of nnΛ., 電荷をもたない奇妙な原子核の高精度探索 --ラムダ-中性子-中性子の三体系--. 京都大学プレスリリース. 2022-03-08.

Published
2022

34. Study of the Λ/Σ0 electroproduction in the low-Q2 region at JLab.

Author

Okuyama, K., Itabashi, K., Nagao, S., Nakamura, S. N., Suzuki, K. N., Gogami, T., Pandey, B., Tang, L., Abrams, D., Akiyama, T., Androic, D., Aniol, K., Ayerbe Gayoso, C., Bane, J., Barcus, S., Barrow, J., Bellini, V., Bhatt, H., Bhetuwal, D., and Biswas, D.

Subjects
*ELECTRONS, *TRITIUM, *HYDROGEN, *NUCLEAR cross sections
Abstract

We performed an experiment using tritium and hydrogen cryogenic gas targets at Thomas Jefferson National Accelerator Facility (JLab) in 2018 (E12-17-003)[1, 2]. In this article, we discuss the Λ/Σ0 hyperon electroproduction from hydrogen target. Elementary Λ/Σ0 hyperon production processes are important not only for an absolute mass scale calibration in our experiment, but also for the study of the electroproduction mechanisms themselves. In this article, we reported the results of the differential cross section for the p(e, e'K+)Λ/Σ0 reaction at Q2 ∼ 0.5 (GeV/c)2. [ABSTRACT FROM AUTHOR]

Published
2022
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35. Study of Λn FSI with Λ quasi-free productions on the 3H(e, e′K+)X reaction at JLab.

Author

Itabashi, K., Suzuki, K.N., Pandey, B., Okuyama, K., Gogami, T., Nagao, S., Nakamura, S.N., Tang, L., Abrams, D., Akiyama, T., Androic, D., Aniol, K., Ayerbe Gayoso, C., Bane, J., Barcus, S., Barrow, J., Bellini, V., Bhatt, H., Bhetuwal, D., and Biswas, D.

Subjects
MASS spectrometry, NUCLEAR reactions, NEUTRONS, ATOMS
Abstract

Abstract. An nnΛ is a neutral baryon system with no charge. The study of the pure Λ-neutron system such as nnΛ gives us information on the Λn interaction. The nnΛ search experiment (E12-17-003) was performed at JLab Hall A in 2018. In this article, the Λn FSI was investigated by a shape analysis of the 3H(e, e′K+)X missing mass spectrum, and a preliminary result for the Λn FSI study is given. [ABSTRACT FROM AUTHOR]

Published
2022
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36. The cross-section measurement for the 3H(e, e′K+)nnΛ reaction

Author

Suzuki, K N, primary, Gogami, T, additional, Pandey, B, additional, Itabashi, K, additional, Nagao, S, additional, Okuyama, K, additional, Nakamura, S N, additional, Tang, L, additional, Abrams, D, additional, Akiyama, T, additional, Androic, D, additional, Aniol, K, additional, Gayoso, C Ayerbe, additional, Bane, J, additional, Barcus, S, additional, Barrow, J, additional, Bellini, V, additional, Bhatt, H, additional, Bhetuwal, D, additional, Biswas, D, additional, Camsonne, A, additional, Castellanos, J, additional, Chen, J-P, additional, Chen, J, additional, Covrig, S, additional, Chrisman, D, additional, Cruz-Torres, R, additional, Das, R, additional, Fuchey, E, additional, Gnanvo, K, additional, Garibaldi, F, additional, Gautam, T, additional, Gomez, J, additional, Gueye, P, additional, Hague, T J, additional, Hansen, O, additional, Henry, W, additional, Hauenstein, F, additional, Higinbotham, D W, additional, Hyde, C E, additional, Kaneta, M, additional, Keppel, C, additional, Kutz, T, additional, Lashley-Colthirst, N, additional, Li, S, additional, Liu, H, additional, Mammei, J, additional, Markowitz, P, additional, McClellan, R E, additional, Meddi, F, additional, Meekins, D, additional, Michaels, R, additional, Mihovilovič, M, additional, Moyer, A, additional, Nguyen, D, additional, Nycz, M, additional, Owen, V, additional, Palatchi, C, additional, Park, S, additional, Petkovic, T, additional, Premathilake, S, additional, Reimer, P E, additional, Reinhold, J, additional, Riordan, S, additional, Rodriguez, V, additional, Samanta, C, additional, Santiesteban, S N, additional, Sawatzky, B, additional, Širca, S, additional, Slifer, K, additional, Su, T, additional, Tian, Y, additional, Toyama, Y, additional, Uehara, K, additional, Urciuoli, G M, additional, Votaw, D, additional, Williamson, J, additional, Wojtsekhowski, B, additional, Wood, S A, additional, Yale, B, additional, Ye, Z, additional, Zhang, J, additional, and Zheng, X, additional

Published
2021
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37. Epithelial-Myoepithelial Carcinoma of The Minor Salivary Glands: Report of Two Cases with Literature Review

Author

Sato Y, Yokokawa M, Harada H, Ikeda T, Michi Y, Kashima Y, Kayamori K, Kuroshima T, Hiral H, Okuyama K, Tsuchiya M, Tomioka H, and Yamagata Y

Subjects
Minor Salivary Glands, Pathology, medicine.medical_specialty, medicine, Biology, medicine.disease, Epithelial-myoepithelial carcinoma
Abstract

Epithelial-myoepithelial carcinoma (EMC) is a rare malignant salivary gland tumor, which is especially uncommon in the minor salivary glands (MSG). We report literature review of EMC of the MSGs with our experience of two cases. Case 1 is a 75-year-old woman with a hard elastic mass in the hard palate, sized 2.5 × 2 cm without ulceration. Incisional biopsy was suggestive of pleomorphic adenoma. Tumor resection was performed with adequate surgical margin. Case 2 is a 44-year-old woman with a mass in the hard palate, sized 1.8 × 1.6 cm without ulceration. Incisional biopsy was suggestive of pleomorphic adenoma or a low-grade salivary gland carcinoma and intraoral tumor resection was performed. Both have good postoperative courses and are alive with no evidence of local recurrence or metastasis at 25 and 10 months. The Ki-67 labeling index in Case 1 and 2 were 10.6 and 3.8 %. Considering that the anatomy, structure, and size of salivary glands are quite different from MSGs, EMCs of the MSG cannot be predicted similarly to EMCs of the major salivary glands. The present review with 18 cases revealed no consensus on treatment methods for MSG cases other than surgery.

Published
2021
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