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6 results on '"Y., Nagase"'

1. Observation of Coulomb-Assisted Nuclear Bound State of Ξ−–N14 System

Author

S. Bleser, Hitoshi Sugimura, S H Hayakawa, T. Takeda, T. L. Ma, H. Kanauchi, D. H. Zhang, Junya Yoshida, T. Hayakawa, Z. Zhang, Khin Than Tint, M. Minakawa, M. H. Kim, M. Hirose, T. J. Moon, S. Y. Matsumoto, R. Kiuchi, T. Takahashi, Manami Nakagawa, E. Hayata, Jihwa Lee, Y. Nakada, Hitoshi Tamura, F. Schupp, Hidetaka Kobayashi, Hiroyuki Ekawa, K. Agari, Yudai Ichikawa, M. Ohashi, Kotaro Shirotori, Yoko Endo, B. Bassalleck, A. Kasagi, Satoshi Sato, R. Goto, E. Umezaki, K. Ito, Manabu Moritsu, S. Ashikaga, Yuya Akazawa, Masahiro Yoshimoto, Yoshikazu Ishikawa, K. Miwa, Hiroyuki Sako, Yuki Fujikawa, M. Ichikawa, J. Pochodzalla, S. Y. Ryu, A. T. Moe, Kenichi Imai, Hiroki Ito, Kazuya Watanabe, Takashi Yamamoto, S. H. Hwang, K. Inaba, S. Ozawa, N. Fujioka, S. H. Kim, Hitoshi Takahashi, Erina Hirose, Shoichi Hasegawa, Y. Nagase, R Honda, Seongbae Yang, K. Hicks, S. Hoshino, T. Hashimoto, J. Y. Sohn, T. Akaishi, Yuki Sato, A. N. L. Nyaw, T. Nanamura, Shunsuke Kanatsuki, Y. Toyama, Aye Moh Moh Theint, M. M. Soe, Myint Kyaw Soe, Takeshi Koike, Y Han, J. K. Ahn, Kenji Hosomi, Kensuke Kobayashi, S. Kinbara, K. Hoshino, Megumi Naruki, A. Koshikawa, K. Tanida, C. S. Yoon, Manami Fujita, D. Nakashima, K. Oue, Toyoki Watabe, W. S. Jung, Kazuma Nakazawa, Takayoshi Kawai, Y. Ogura, Mifuyu Ukai, and Kazuhiro Suzuki

Subjects
Physics, Binding energy, Hyperon, General Physics and Astronomy, State (functional analysis), Coupling (probability), 01 natural sciences, 0103 physical sciences, Bound state, Coulomb, Absorption (logic), Atomic physics, 010306 general physics, Energy (signal processing)
Abstract

In an emulsion-counter hybrid experiment performed at J-PARC, a Ξ^{-} absorption event was observed which decayed into twin single-Λ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as Ξ^{-}+^{14}N→_{Λ}^{10}Be+_{Λ}^{5}He. For the binding energy of the Ξ^{-} hyperon in the Ξ^{-}-^{14}N system a value of 1.27±0.21 MeV was deduced. The energy level of Ξ^{-} is likely a nuclear 1p state which indicates a weak ΞN-ΛΛ coupling.

Published
2021
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2. Observation of Coulomb-Assisted Nuclear Bound State of Ξ^{-}-^{14}N System

Author

S H, Hayakawa, K, Agari, J K, Ahn, T, Akaishi, Y, Akazawa, S, Ashikaga, B, Bassalleck, S, Bleser, H, Ekawa, Y, Endo, Y, Fujikawa, N, Fujioka, M, Fujita, R, Goto, Y, Han, S, Hasegawa, T, Hashimoto, T, Hayakawa, E, Hayata, K, Hicks, E, Hirose, M, Hirose, R, Honda, K, Hoshino, S, Hoshino, K, Hosomi, S H, Hwang, Y, Ichikawa, M, Ichikawa, K, Imai, K, Inaba, Y, Ishikawa, H, Ito, K, Ito, W S, Jung, S, Kanatsuki, H, Kanauchi, A, Kasagi, T, Kawai, M H, Kim, S H, Kim, S, Kinbara, R, Kiuchi, H, Kobayashi, K, Kobayashi, T, Koike, A, Koshikawa, J Y, Lee, T L, Ma, S Y, Matsumoto, M, Minakawa, K, Miwa, A T, Moe, T J, Moon, M, Moritsu, Y, Nagase, Y, Nakada, M, Nakagawa, D, Nakashima, K, Nakazawa, T, Nanamura, M, Naruki, A N L, Nyaw, Y, Ogura, M, Ohashi, K, Oue, S, Ozawa, J, Pochodzalla, S Y, Ryu, H, Sako, S, Sato, Y, Sato, F, Schupp, K, Shirotori, M M, Soe, M K, Soe, J Y, Sohn, H, Sugimura, K N, Suzuki, H, Takahashi, T, Takahashi, T, Takeda, H, Tamura, K, Tanida, A M M, Theint, K T, Tint, Y, Toyama, M, Ukai, E, Umezaki, T, Watabe, K, Watanabe, T O, Yamamoto, S B, Yang, C S, Yoon, J, Yoshida, M, Yoshimoto, D H, Zhang, and Z, Zhang

Abstract

In an emulsion-counter hybrid experiment performed at J-PARC, a Ξ^{-} absorption event was observed which decayed into twin single-Λ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as Ξ^{-}+^{14}N→_{Λ}^{10}Be+_{Λ}^{5}He. For the binding energy of the Ξ^{-} hyperon in the Ξ^{-}-^{14}N system a value of 1.27±0.21 MeV was deduced. The energy level of Ξ^{-} is likely a nuclear 1p state which indicates a weak ΞN-ΛΛ coupling.

Published
2020

3. Observation of aHΛΛ6eDouble Hypernucleus

Author

S. Torikai, J. Parker, M. Yosoi, J. H. Chung, N. Ushida, Hiroyuki Noumi, D.H. Davis, M. Mitsuhara, Tomoko Yoshida, Y. S. Iwata, Y. S. Ra, Fujio Takeutchi, Kazuma Nakazawa, Y. L. Lee, H. Torii, H. Shibuya, M. Sekimoto, K. S. Sim, C. O. Kim, Junji Tojo, Y. Nagase, K. M. Baik, Adam Rusek, H. Okabe, K. Oyama, S. J. Kim, Tomokazu Fukuda, Kazunuki Yamamoto, H. Akikawa, K. Imai, K. Arai, J. S. Song, J. K. Ahn, H. Tanaka, L. H. Zhu, T. Takahashi, B. Bassalleck, C. S. Yoon, T. Kouketsu, Shigeki Aoki, M. S. Chung, D.N. Tovee, Saewoong Bahk, Takayoshi Kawai, C. Nagoshi, Seok Kim, J. Y. Kim, J. W C McNabb, H. M. Park, N. Yasuda, K. Hoshino, H. Kanda, Masaharu Ieiri, K. Tanida, I. G. Park, Y. H. Iwata, Hirotaka Takahashi, J. T. Rhee, M. Kawasaki, M. Kaneko, S. Ogawa, P. K. Saha, D. Seki, C. J. Yoon, Y. Kondo, J. T. Yang, and A. K. Ichikawa

Subjects
Physics, Particle physics, Excited state, Hyperon, General Physics and Astronomy, Lambda, Hypernucleus
Abstract

A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of ${}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}^{6}\mathrm{He}$ emitted from a ${\ensuremath{\Xi}}^{\ensuremath{-}}$ hyperon nuclear capture at rest. The mass of ${}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}^{6}\mathrm{He}$ and the $\ensuremath{\Lambda}\ensuremath{-}\ensuremath{\Lambda}$ interaction energy $\ensuremath{\Delta}{B}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}$ have been measured for the first time devoid of the ambiguities due to the possibilities of excited states. The value of $\ensuremath{\Delta}{B}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}$ is $1.01\ifmmode\pm\else\textpm\fi{}{0.20}_{\ensuremath{-}0.11}^{+0.18}\phantom{\rule{0ex}{0ex}}\mathrm{MeV}$. This demonstrates that the $\ensuremath{\Lambda}\ensuremath{-}\ensuremath{\Lambda}$ interaction is weakly attractive.

Published
2001
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4. Observation of a (6)(LambdaLambda)He double hypernucleus

Author

H, Takahashi, J K, Ahn, H, Akikawa, S, Aoki, K, Arai, S Y, Bahk, K M, Baik, B, Bassalleck, J H, Chung, M S, Chung, D H, Davis, T, Fukuda, K, Hoshino, A, Ichikawa, M, Ieiri, K, Imai, Y H, Iwata, Y S, Iwata, H, Kanda, M, Kaneko, T, Kawai, M, Kawasaki, C O, Kim, J Y, Kim, S J, Kim, S H, Kim, Y, Kondo, T, Kouketsu, Y L, Lee, J W, McNabb, M, Mitsuhara, Y, Nagase, C, Nagoshi, K, Nakazawa, H, Noumi, S, Ogawa, H, Okabe, K, Oyama, H M, Park, I G, Park, J, Parker, Y S, Ra, J T, Rhee, A, Rusek, H, Shibuya, K S, Sim, P K, Saha, D, Seki, M, Sekimoto, J S, Song, T, Takahashi, F, Takeutchi, H, Tanaka, K, Tanida, J, Tojo, H, Torii, S, Torikai, D N, Tovee, N, Ushida, K, Yamamoto, N, Yasuda, J T, Yang, C J, Yoon, C S, Yoon, M, Yosoi, T, Yoshida, and L, Zhu

Abstract

A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of ( 6)(LambdaLambda)He emitted from a Xi(-) hyperon nuclear capture at rest. The mass of ( 6)(LambdaLambda)He and the Lambda-Lambda interaction energy DeltaB(LambdaLambda) have been measured for the first time devoid of the ambiguities due to the possibilities of excited states. The value of DeltaB(LambdaLambda) is 1.01+/-0.20(+0.18)(-0.11) MeV. This demonstrates that the Lambda-Lambda interaction is weakly attractive.

Published
2001

5. Observation of Coulomb-Assisted Nuclear Bound State of Ξ^{-}-^{14}N System.

Author

Hayakawa SH, Agari K, Ahn JK, Akaishi T, Akazawa Y, Ashikaga S, Bassalleck B, Bleser S, Ekawa H, Endo Y, Fujikawa Y, Fujioka N, Fujita M, Goto R, Han Y, Hasegawa S, Hashimoto T, Hayakawa T, Hayata E, Hicks K, Hirose E, Hirose M, Honda R, Hoshino K, Hoshino S, Hosomi K, Hwang SH, Ichikawa Y, Ichikawa M, Imai K, Inaba K, Ishikawa Y, Ito H, Ito K, Jung WS, Kanatsuki S, Kanauchi H, Kasagi A, Kawai T, Kim MH, Kim SH, Kinbara S, Kiuchi R, Kobayashi H, Kobayashi K, Koike T, Koshikawa A, Lee JY, Ma TL, Matsumoto SY, Minakawa M, Miwa K, Moe AT, Moon TJ, Moritsu M, Nagase Y, Nakada Y, Nakagawa M, Nakashima D, Nakazawa K, Nanamura T, Naruki M, Nyaw ANL, Ogura Y, Ohashi M, Oue K, Ozawa S, Pochodzalla J, Ryu SY, Sako H, Sato S, Sato Y, Schupp F, Shirotori K, Soe MM, Soe MK, Sohn JY, Sugimura H, Suzuki KN, Takahashi H, Takahashi T, Takeda T, Tamura H, Tanida K, Theint AMM, Tint KT, Toyama Y, Ukai M, Umezaki E, Watabe T, Watanabe K, Yamamoto TO, Yang SB, Yoon CS, Yoshida J, Yoshimoto M, Zhang DH, and Zhang Z

Abstract

In an emulsion-counter hybrid experiment performed at J-PARC, a Ξ^{-} absorption event was observed which decayed into twin single-Λ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as Ξ^{-}+^{14}N→_{Λ}^{10}Be+_{Λ}^{5}He. For the binding energy of the Ξ^{-} hyperon in the Ξ^{-}-^{14}N system a value of 1.27±0.21  MeV was deduced. The energy level of Ξ^{-} is likely a nuclear 1p state which indicates a weak ΞN-ΛΛ coupling.

Published
2021
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6. Observation of a (6)(LambdaLambda)He double hypernucleus.

Author

Takahashi H, Ahn JK, Akikawa H, Aoki S, Arai K, Bahk SY, Baik KM, Bassalleck B, Chung JH, Chung MS, Davis DH, Fukuda T, Hoshino K, Ichikawa A, Ieiri M, Imai K, Iwata YH, Iwata YS, Kanda H, Kaneko M, Kawai T, Kawasaki M, Kim CO, Kim JY, Kim SJ, Kim SH, Kondo Y, Kouketsu T, Lee YL, McNabb JW, Mitsuhara M, Nagase Y, Nagoshi C, Nakazawa K, Noumi H, Ogawa S, Okabe H, Oyama K, Park HM, Park IG, Parker J, Ra YS, Rhee JT, Rusek A, Shibuya H, Sim KS, Saha PK, Seki D, Sekimoto M, Song JS, Takahashi T, Takeutchi F, Tanaka H, Tanida K, Tojo J, Torii H, Torikai S, Tovee DN, Ushida N, Yamamoto K, Yasuda N, Yang JT, Yoon CJ, Yoon CS, Yosoi M, Yoshida T, and Zhu L

Abstract

A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of ( 6)(LambdaLambda)He emitted from a Xi(-) hyperon nuclear capture at rest. The mass of ( 6)(LambdaLambda)He and the Lambda-Lambda interaction energy DeltaB(LambdaLambda) have been measured for the first time devoid of the ambiguities due to the possibilities of excited states. The value of DeltaB(LambdaLambda) is 1.01+/-0.20(+0.18)(-0.11) MeV. This demonstrates that the Lambda-Lambda interaction is weakly attractive.

Published
2001
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