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Σ-nucleus potential studied with the(π−,K+)reaction on medium-to-heavy nuclear targets
Saha, P. K.,Noumi, H.,Abe, D.,Ajimura, S.,Aoki, K.,Bhang, H. C.,Dobashi, K.,Endo, T.,Fujii, Y.,Fukuda, T.,Guo, H. C.,Hashimoto, O.,Hotchi, H.,Imai, K.,Kim, E. H.,Kim, J. H.,Kishimoto, T.,Krutenkova, A American Physical Society 2004 PHYSICAL REVIEW C - Vol.70 No.4
Search for strange tribaryons in the He4(K<i>stop</i>−,n<sup>π±</sup>) reaction
Yim, H.,Bhang, H.,Chiba, J.,Choi, Seonho,Fukuda, Y.,Hanaki, T.,Hayano, R.S.,Iio, M.,Ishikawa, T.,Ishimoto, S.,Ishiwatari, T.,Itahashi, K.,Iwai, M.,Iwasaki, M.,Kienle, P.,Kim, J.H.,Matsuda, Y.,Ohnishi, Elsevier 2010 Physics letters: B Vol.688 No.1
<P><B>Abstract</B></P><P>We have recently reported on an indication of the strange tribaryon state, S<SUP>+</SUP>, with a mass M∼3140 MeV/<SUP>c2</SUP> and width Γ<23 MeV/<SUP>c2</SUP>, in the neutron time-of-flight (TOF) spectrum of the He4(K<I>stop</I>−,n<SUP>π±</SUP>) reaction of the KEK-PS E471 experiment in a search for the deeply bound narrow <SUP>K−</SUP>ppn (total isospin T=0) state. In an attempt to confirm the state and search for other possible T=0, 1 tribaryonic states, we have re-measured the neutron energy spectrum of the same reaction in the KEK-PS E549 experiment with an upgraded setup for which the TOF resolution was improved 1.5 times and the statistics was increased 6 times. However, in the neutron spectra, we find such a smooth distribution that we conclude the state is either not so strong to stick out of the inclusive background or too broad to be identified as a distinct peak. We estimated the upper limits of the formation probability of the possible tribaryonic state for three widths, 0, 20, and 40 MeV/<SUP>c2</SUP>. The obtained upper limit (95% CL) for a state as narrow as 20 MeV/<SUP>c2</SUP> is at most 1% per stopped kaon over the wide mass range of 3000–3200 MeV/<I>c</I><SUP>2</SUP>, while it reaches to 4∼5% at around 3140 MeV/<I>c</I><SUP>2</SUP> for Γ⩾40 MeV/<SUP>c2</SUP>, implying the possible existence of unknown processes including tribaryonic formation.</P>
SEARCH FOR STRANGE TRIBARYON STATES IN THE 4He(STOPPED K-, p) REACTION
SATO, M.,BHANG, H.,CHIBA, J.,CHOI, SEONHO,FUKUDA, Y.,HANAKI, T.,HAYANO, R. S.,IIO, M.,ISHIKAWA, T.,ISHIMOTO, S.,ISHIWATARI, T.,ITAHASHI, K.,IWAI, M.,IWASAKI, M.,KIENLE, P.,KIM, J. H.,MATSUDA, Y.,OHNIS World Scientific 2009 International Journal of Modern Physics A Vol.24 No.2
<P> We have measured a proton energy from the stopped K<SUP>-</SUP> reaction on <SUP>4</SUP> He to search for strange tribaryon states at KEK 12 GeV PS. No statistically significant signal was observed in the missing mass spectrum obtained by the inclusive <SUP>4</SUP> He ( stopped K<SUP>-</SUP>, p) measurement. Upper limits of the formation branching ratio at the 95 % C.L. were derived for neutral tribaryon states with strangeness -1 to be (0.4 ~ 6) × 10<SUP>-4</SUP>, (0.2 ~ 6) × 10<SUP>-3</SUP> and (0.06 ~ 5) × 10<SUP>-2</SUP>/(stopped K<SUP>-</SUP>) for assumed natural widths of 0, 20 and 40 MeV /c<SUP>2</SUP>, respectively. </P>
Nakayama, S.,Mauger, C.,Ahn, M.H.,Aoki, S.,Ashie, Y.,Bhang, H.,Boyd, S.,Casper, D.,Choi, J.H.,Fukuda, S.,Fukuda, Y.,Gran, R.,Hara, T.,Hasegawa, M.,Hasegawa, T.,Hayashi, K.,Hayato, Y.,Hill, J.,Ichikawa Elsevier 2005 Physics letters: B Vol.619 No.3
<P><B>Abstract</B></P><P>Neutral current single <SUP>π0</SUP> production induced by neutrinos with a mean energy of 1.3 GeV is measured using a 1000 ton water Cherenkov detector in the K2K long baseline neutrino experiment. The cross section for this process relative to the total charged current cross section is measured to be 0.064±0.001(stat.)±0.007(sys.). The momentum distribution of neutral current <SUP>π0</SUP>s from a water target is measured with high statistics for the first time.</P>
Sonomi Shibuya,Zaal Kikvidze,Wataru Toki,Yasuto Kanazawa,Tatsuya Suizu,Tamio Yajima,Takahiro Fujimori,Mohammad Reza Mansournia,Zuhair Sule,Kôhei Kubota,Kenji Fukuda 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.4
A Satoyama landscape is an important reservoir of biodiversity; however, in post-industrial era traditionalSatoyama management became economically unfeasible. To maintain Satoyama, labor-saving management styles have begun to be implemented. In contrast to thetraditional styles based on labor-intensive practices such as rotational tree clear-cutting, the labor-saving stylesconsist mainly in tree thinning and ground vegetation cutting within a small spatial range. The consequencesof this newapproach are unclear, and our study aimed at filling this gap in our knowledge by analyzing the effectsofsmall scalemanagement on ground beetle community in suburban Satoyama (Kashiwacity, central Japan).Weapplied labor-savingmanagement at limited spatial range, and sampled and analyzed ground beetles both beforeand after management. Cluster analysis revealed three groups of beetle assemblages, corresponding to threehabitats: forest, bamboo stand and grassland. Comparison of wing traits showed that, before management, brachypterousbeetles dominated forest plots and macropterous beetleswere more prominent in the grassland plot,while in the bamboo stand both types of wing morphology were evenly represented. This trend can be linked tohabitat structural stability driven by vegetation regeneration cycleswhich reflect dominant plant longevity. Aftermanagement, macroptery increased in all three habitats. Probably, habitat disturbance created by vegetationmanagement gave advantage to macropterous beetles over brachypterous beetles. These results suggest thatwing type can be linked to vegetation structural stability. In some species, decline in abundance was accompaniedwith decline in body size. Our study shows that small scale Satoyama management can have pronouncedeffects on beetle assemblages.
Precision measurement of the 3d->2p x-ray energy in kaonic <sup>4</sup>He
Okada, S.,Beer, G.,Bhang, H.,Cargnelli, M.,Chiba, J.,Choi, S.,Curceanu, C.,Fukuda, Y.,Hanaki, T.,Hayano, R.S.,Iio, M.,Ishikawa, T.,Ishimoto, S.,Ishiwatari, T.,Itahashi, K.,Iwai, M.,Iwasaki, M.,Juhasz, North-Holland Pub. Co 2007 Physics letters: B Vol.653 No.5
We have measured the Balmer-series x-rays of kaonic <SUP>4</SUP>He atoms using novel large-area silicon drift x-ray detectors in order to study the low-energy K@?-nucleus strong interaction. The energy of the 3d->2p transition was determined to be 6467+/-3(stat)+/-2(syst) eV. The resulting strong-interaction energy-level shift is in agreement with theoretical calculations, thus eliminating a long-standing discrepancy between theory and experiment.
K. Tahara,Y. Fukuda,G. Wakabayashi,H. Ban,Y. Morimoto,M. Yoshioka,K. Kiyohara,Y. Koba,H. Iwamoto,Y. Uozumi,N. Matsufuji 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
We measured proton-production double differential cross sections (DDXs) by 290 MeV/u carbon beams on carbon, copper, lead targets at forward angles. The proton energies were measured with the spectrometer which consisted of GSO(Ce) crystals and plastic scintillators. The measured DDXs were compared with the calculated ones with PHITS code. The simulation results generally agreed with the measured ones. The measured results will be useful as the benchmark of existing simulation codes and for the future improvements.
Fujitani, K.,Yang, H.-K.,Kurokawa, Y.,Park, D. J.,Tsujinaka, T.,Park, B.-J.,Fukuda, H.,Noh, S. H.,Boku, N.,Bang, Y.-J.,Sasako, M.,Lee, J.-I. Oxford University Press 2008 Japanese journal of clinical oncology Vol.38 No.7
<P>A randomized controlled trial has started in both Japan and Korea to evaluate the role of gastrectomy in the management of incurable advanced gastric cancer (AGC). Patients with AGC diagnosed as having a single non-curable factor are randomized to gastrectomy plus chemotherapy or chemotherapy alone. Surgeons at 33 specialized centers in Japan and at 15 high-volume hospitals in Korea will recruit 330 patients. Primary end-point is overall survival, and secondary end-points are progression-free survival and adverse events associated with either gastrectomy or chemotherapy.</P>
SUPER LOW SPEED CONTROL FOR LIM
Y.Ogino,K.Abe,K.Ohishi,M.Nakaoka,H.Fukuda,Y.Takakado,K.Nakano,Y.Murakami 전력전자학회 1992 ICPE(ISPE)논문집 Vol.1992 No.4
This paper proposes the super low speed control method for LIM (Linear Induction Motor). The feasibly-proposed control method is based on the vector-control strategy using the current controlled VVVF inverter. Using this control implementation, both the quick speed response and the smooth thrust characteristics are realized in the super low speed range. The experimental results provide its desired operating characteristics in this system.<br/>