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Start Over Author "Ajimura, S." Journal physical review letters
25 results on '"Ajimura, S."'

1. Search for theΘ+Pentaquark via theπ−p→K−XReaction at1.92GeV/c

Author

Shirotori, K., primary, Takahashi, T. N., additional, Adachi, S., additional, Agnello, M., additional, Ajimura, S., additional, Aoki, K., additional, Bhang, H. C., additional, Bassalleck, B., additional, Botta, E., additional, Bufalino, S., additional, Chiga, N., additional, Evtoukhovitch, P., additional, Feliciello, A., additional, Fujioka, H., additional, Hiruma, F., additional, Honda, R., additional, Hosomi, K., additional, Ichikawa, Y., additional, Ieiri, M., additional, Igarashi, Y., additional, Imai, K., additional, Ishibashi, N., additional, Ishimoto, S., additional, Itahashi, K., additional, Iwasaki, R., additional, Joo, C. W., additional, Kim, M. J., additional, Kim, S. J., additional, Kiuchi, R., additional, Koike, T., additional, Komatsu, Y., additional, Kulikov, V. V., additional, Marcello, S., additional, Masumoto, S., additional, Matsuoka, K., additional, Miwa, K., additional, Moritsu, M., additional, Nagae, T., additional, Naruki, M., additional, Niiyama, M., additional, Noumi, H., additional, Ozawa, K., additional, Saito, N., additional, Sakaguchi, A., additional, Sako, H., additional, Samoilov, V., additional, Sato, M., additional, Sato, S., additional, Sato, Y., additional, Sawada, S., additional, Sekimoto, M., additional, Sugimura, H., additional, Suzuki, S., additional, Takahashi, H., additional, Takahashi, T., additional, Tamura, H., additional, Tanaka, T., additional, Tanida, K., additional, Tokiyasu, A. O., additional, Tomida, N., additional, Tsamalaidze, Z., additional, Ukai, M., additional, Yagi, K., additional, Yamamoto, T. O., additional, Yang, S. B., additional, Yonemoto, Y., additional, Yoon, C. J., additional, and Yoshida, K., additional

Published
2012
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2. Three-Body Nonmesonic Weak Decay of theCΛ12Hypernucleus

Author

Kim, M., primary, Ajimura, S., additional, Aoki, K., additional, Banu, A., additional, Bhang, H., additional, Fukuda, T., additional, Hashimoto, O., additional, Hwang, J. I., additional, Kameoka, S., additional, Kang, B. H., additional, Kim, E., additional, Kim, J. H., additional, Maruta, T., additional, Miura, Y., additional, Miyake, Y., additional, Nagae, T., additional, Nakamura, M., additional, Nakamura, S. N., additional, Noumi, H., additional, Okada, S., additional, Okayasu, Y., additional, Outa, H., additional, Park, H., additional, Saha, P. K., additional, Sato, Y., additional, Sekimoto, M., additional, Takahashi, T., additional, Tamura, H., additional, Tanida, K., additional, Toyoda, A., additional, Tshoo, K., additional, Tsukada, K., additional, Watanabe, T., additional, and Yim, H. J., additional

Published
2009
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3. Exclusive Measurement of the Nonmesonic Weak Decay of theHeΛ5Hypernucleus

Author

Kang, B. H., primary, Bhang, H., additional, Kim, E. H., additional, Kim, J. H., additional, Kim, M. J., additional, Yim, H. J., additional, Ajimura, S., additional, Miyake, Y., additional, Aoki, K., additional, Nagae, T., additional, Noumi, H., additional, Outa, H., additional, Saha, P. K., additional, Sato, Y., additional, Sekimoto, M., additional, Toyoda, A., additional, Banu, A., additional, Fukuda, T., additional, Hashimoto, O., additional, Kameoka, S., additional, Miura, Y., additional, Nakamura, S. N., additional, Okayasu, Y., additional, Takahashi, T., additional, Tamura, H., additional, Tsukada, K., additional, Watanabe, T., additional, Hwang, J. I., additional, Maruta, T., additional, Nakamura, M., additional, Okada, S., additional, Park, H., additional, and Tanida, K., additional

Published
2006
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4. Production of the Neutron-Rich HypernucleusLiΛ10in the(π−,K+)Double Charge-Exchange Reaction

Author

Saha, P. K., primary, Fukuda, T., additional, Imoto, W., additional, Ahn, J. K., additional, Ajimura, S., additional, Aoki, K., additional, Bhang, H. C., additional, Fujioka, H., additional, Hotchi, H., additional, Hwang, J. I., additional, Itabashi, T., additional, Kang, B. H., additional, Kim, H. D., additional, Kim, M. J., additional, Kishimoto, T., additional, Krutenkova, A., additional, Maruta, T., additional, Miura, Y., additional, Miwa, K., additional, Nagae, T., additional, Noumi, H., additional, Outa, H., additional, Ohtaki, T., additional, Sakaguchi, A., additional, Sato, Y., additional, Sekimoto, M., additional, Shimizu, Y., additional, Tamura, H., additional, Tanida, K., additional, Toyoda, A., additional, Ukai, M., additional, and Yim, H. J., additional

Published
2005
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5. Hypernuclear Fine Structure inOΛ16and theΛNTensor Interaction

Author

Ukai, M., primary, Ajimura, S., additional, Akikawa, H., additional, Alburger, D. E., additional, Banu, A., additional, Chrien, R. E., additional, Franklin, G. B., additional, Franz, J., additional, Hashimoto, O., additional, Hayakawa, T., additional, Hotchi, H., additional, Imai, K., additional, Kishimoto, T., additional, May, M., additional, Millener, D. J., additional, Minami, S., additional, Miura, Y., additional, Miyoshi, T., additional, Mizunuma, K., additional, Nagae, T., additional, Nakamura, S. N., additional, Nakazawa, K., additional, Okayasu, Y., additional, Pile, P., additional, Quinn, B. P., additional, Rusek, A., additional, Sato, Y., additional, Sutter, R., additional, Takahashi, H., additional, Tang, L., additional, Tamura, H., additional, Tanida, K., additional, Yuan, L., additional, and Zhou, S. H., additional

Published
2004
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6. Sigma-Nucleus Potential inA=28

Author

Noumi, H., primary, Saha, P. K., additional, Abe, D., additional, Ajimura, S., additional, Aoki, K., additional, Bhang, H. C., additional, Endo, T., additional, Fujii, Y., additional, Fukuda, T., additional, Guo, H. C., additional, Imai, K., additional, Hashimoto, O., additional, Hotchi, H., additional, Kim, E. H., additional, Kim, J. H., additional, Kishimoto, T., additional, Krutenkova, A., additional, Maeda, K., additional, Nagae, T., additional, Nakamura, M., additional, Outa, H., additional, Sekimoto, M., additional, Saito, T., additional, Sakaguchi, A., additional, Sato, Y., additional, Sawafta, R., additional, Shimizu, Y., additional, Takahashi, T., additional, Tang, L., additional, Tamura, H., additional, Tanida, K., additional, Watanabe, T., additional, Xia, H. H., additional, Zhou, S. H., additional, Zhu, L. H., additional, and Zhu, X. F., additional

Published
2002
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7. Hypernuclear Fine Structure inBΛ9e

Author

Akikawa, H., primary, Ajimura, S., additional, Chrien, R. E., additional, Eugenio, P. M., additional, Franklin, G. B., additional, Franz, J., additional, Gang, L., additional, Imai, K., additional, Khaustov, P., additional, May, M., additional, Pile, P. H., additional, Quinn, B., additional, Rusek, A., additional, Sasao, J., additional, Sawafta, R. I., additional, Schmitt, H., additional, Tamura, H., additional, Tang, L., additional, Tanida, K., additional, Yuan, L., additional, Zhou, S. H., additional, Zhu, L. H., additional, and Zhu, X. F., additional

Published
2002
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8. Proton Energy Spectra in the Nonmesonic Weak Decay ofΛ12CandΛ28SiHypernuclei

Author

Hashimoto, O., primary, Ajimura, S., additional, Aoki, K., additional, Bhang, H., additional, Hasegawa, T., additional, Hotchi, H., additional, Kim, Y. D., additional, Kishimoto, T., additional, Maeda, K., additional, Noumi, H., additional, Ohta, Y., additional, Omata, K., additional, Outa, H., additional, Park, H., additional, Sato, Y., additional, Sekimoto, M., additional, Shibata, T., additional, Takahashi, T., additional, and Youn, M., additional

Published
2002
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9. Production ofΛΛ4HHypernuclei

Author

Ahn, J. K., primary, Ajimura, S., additional, Akikawa, H., additional, Bassalleck, B., additional, Berdoz, A., additional, Carman, D., additional, Chrien, R. E., additional, Davis, C. A., additional, Eugenio, P., additional, Fischer, H., additional, Franklin, G. B., additional, Franz, J., additional, Fukuda, T., additional, Gan, L., additional, Hotchi, H., additional, Ichikawa, A., additional, Imai, K., additional, Kahana, S. H., additional, Khaustov, P., additional, Kishimoto, T., additional, Koran, P., additional, Kohri, H., additional, Kourepin, A., additional, Kubota, K., additional, Landry, M., additional, May, M., additional, Meyer, C., additional, Meziani, Z., additional, Minami, S., additional, Miyachi, T., additional, Nagae, T., additional, Nakano, J., additional, Outa, H., additional, Paschke, K., additional, Pile, P., additional, Prokhabatilov, M., additional, Quinn, B. P., additional, Rasin, V., additional, Rusek, A., additional, Schmitt, H., additional, Schumacher, R. A., additional, Sekimoto, M., additional, Shileev, K., additional, Shimizu, Y., additional, Sutter, R., additional, Tamagawa, T., additional, Tang, L., additional, Tanida, K., additional, Yamamoto, K., additional, and Yuan, L., additional

Published
2001
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10. Observation of Spin-Orbit Splitting inΛSingle-Particle States

Author

Ajimura, S., primary, Hayakawa, H., additional, Kishimoto, T., additional, Kohri, H., additional, Matsuoka, K., additional, Minami, S., additional, Mori, T., additional, Morikubo, K., additional, Saji, E., additional, Sakaguchi, A., additional, Shimizu, Y., additional, Sumihama, M., additional, Chrien, R. E., additional, May, M., additional, Pile, P., additional, Rusek, A., additional, Sutter, R., additional, Eugenio, P., additional, Franklin, G., additional, Khaustov, P., additional, Paschke, K., additional, Quinn, B. P., additional, Schumacher, R. A., additional, Franz, J., additional, Fukuda, T., additional, Noumi, H., additional, Outa, H., additional, Gan, L., additional, Tang, L., additional, Yuan, L., additional, Tamura, H., additional, Nakano, J., additional, Tamagawa, T., additional, Tanida, K., additional, and Sawafta, R., additional

Published
2001
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11. Asymmetry in the Nonmesonic Weak Decay of PolarizedΛ5HeHypernuclei

Author

Ajimura, S., primary, Ikeda, K., additional, Ishikawa, M., additional, Kishimoto, T., additional, Okusu, A., additional, Shinkai, N., additional, Tanaka, Y., additional, Ejiri, H., additional, Nakano, T., additional, Manabe, K., additional, Nagae, T., additional, Noumi, H., additional, Sekimoto, M., additional, Shibata, T., additional, Hashimoto, O., additional, Maeda, K., additional, Takahashi, T., additional, Hasegawa, T., additional, Bhang, H., additional, Kim, Y. D., additional, Park, H., additional, and Youn, M., additional

Published
2000
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12. Lifetime Measurement ofΛ12C,Λ28Si, andΛFeHypernuclei

Author

Bhang, H., primary, Ajimura, S., additional, Aoki, K., additional, Hasegawa, T., additional, Hashimoto, O., additional, Hotchi, H., additional, Kim, Y. D., additional, Kishimoto, T., additional, Maeda, K., additional, Noumi, H., additional, Ohta, Y., additional, Omata, K., additional, Outa, H., additional, Park, H., additional, Sato, Y., additional, Sekimoto, M., additional, Shibata, T., additional, Takahashi, T., additional, and Youn, M., additional

Published
1998
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13. Polarization ofΛ5HeProduced by the(π+,K+)Reaction

Author

Ajimura, S., primary, Ishikawa, M., additional, Ikeda, K., additional, Kishimoto, T., additional, Okusu, A., additional, Shinkai, N., additional, Tanaka, Y., additional, Ejiri, H., additional, Nakano, T., additional, Nagae, T., additional, Noumi, H., additional, Manabe, K., additional, Sekimoto, M., additional, Shibata, T., additional, Hashimoto, O., additional, Maeda, K., additional, Takahashi, T., additional, Hasegawa, T., additional, Bhang, H., additional, Park, H., additional, Kim, Y., additional, Youn, M., additional, Motoba, T., additional, and Itonaga, K., additional

Published
1998
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14. Core-Excited States ofCΛ12Hypernuclei Formed in the (π+, K+) reaction

Author

Hasegawa, T., primary, Hashimoto, O., additional, Homma, S., additional, Miyachi, T., additional, Nagae, T., additional, Sekimoto, M., additional, Shibata, T., additional, Sakaguchi, H., additional, Takahashi, T., additional, Aoki, K., additional, Noumi, H., additional, Bhang, H., additional, Youn, M., additional, Gavrilov, Y., additional, Ajimura, S., additional, Kishimoto, T., additional, Ohkusu, A., additional, Maeda, K., additional, Sawafta, R., additional, and Redwine, R. P., additional

Published
1995
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15. Polarization of Λ hyperons produced by the quasifree (π^{+},K^{+}) reaction on ^{12}C

Author

Ajimura, S., primary, Ejiri, H., additional, Higashi, A., additional, Inoue, G., additional, Iseki, Y., additional, Kishimoto, T., additional, Nakamura, F., additional, Noumi, H., additional, Ohsumi, H., additional, Sano, H., additional, Gill, D., additional, Lee, L., additional, Olin, A., additional, Yen, S., additional, Fukuda, T., additional, Hashimoto, O., additional, Shibata, T., additional, Nomachi, M., additional, Kimura, Y., additional, and Maeda, K., additional

Published
1992
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16. Search for the Θ+ Pentaquark via the π- p → K-X Reaction at 1.92 GeV/c.

Author

Shirotori, K., Takahashi, T. N., Adachi, S., Agnello, M., Ajimura, S., Aoki, K., Bhang, H. C., Bassalleck, B., Botta, E., Bufalino, S., Chiga, N., Evtoukhovitch, P., Feliciello, A., Fujioka, H., Hiruma, F., Honda, R., Hosomi, K., Ichikawa, Y., Ieiri, M., and Igarashi, Y.

Subjects
*BARYONS, *POTASSIUM isotopes, *NUCLEAR reactions, *SCATTERING (Physics), *MISSING mass problem (Astronomy), *NUCLEAR cross sections, *LAGRANGIAN functions
Abstract

The Θ+ pentaquark baryon was searched for via the π- p → K- X reaction with a missing mass resolution of 1.4 MeV/c2 (FWHM) at the Japan Proton Accelerator Research Complex (J-PARC). π- meson beams were incident on the liquid hydrogen target with a beam momentum of 1.92 GeV/c. No peak structure corresponding to the Θ+ mass was observed. The upper limit of the production cross section averaged over the scattering angle of 2° to 15° in the laboratory frame is obtained to be 0.26 /μb/sr in the mass region of 1.51-1.55 GeV/c2. The upper limit of the Θ+ decay width is obtained to be 0.72 and 3.1 MeV for JΘP = 1/2+ and JΘP = 1/2-, respectively, using the effective Lagrangian approach. [ABSTRACT FROM AUTHOR]

Published
2012
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17. Interference Effect between ϕ and Λ(1520) Production Channels in the γp→K+K-p Reaction near Threshold.

Author

Ryu, S. Y., Ahn, J. K., Nakano, T., Ahn, D. S., Ajimura, S., Akimune, H., Asano, Y., Chang, W. C., Chen, J. Y., Daté, S., Ejiri, H., Fujimura, H., Fujiwara, M., Fukui, S., Hasegawa, S., Hicks, K., Horie, K., Hotta, T., Hwang, S. H., and Imai, K.

Subjects
*POTASSIUM isotopes, *PAIR production, *NUCLEAR reactions
Abstract

The ϕ−Λ(1520) interference effect in the γp→K+K−p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between ϕ and Λ(1520) production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when K+K- pairs are observed at forward angles but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the √s=2.1  GeV bump structure in forward differential cross sections for ϕ photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange, or rescattering processes via other hyperon states. [ABSTRACT FROM AUTHOR]

Published
2016
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18. Interference Effect between ϕ and Λ(1520) Production Channels in the γp→K^{+}K^{-}p Reaction near Threshold.

Author

Ryu SY, Ahn JK, Nakano T, Ahn DS, Ajimura S, Akimune H, Asano Y, Chang WC, Chen JY, Daté S, Ejiri H, Fujimura H, Fujiwara M, Fukui S, Hasegawa S, Hicks K, Horie K, Hotta T, Hwang SH, Imai K, Ishikawa T, Iwata T, Kato Y, Kawai H, Kino K, Kohri H, Kon Y, Kumagai N, Lin PJ, Maeda Y, Makino S, Matsuda T, Matsuoka N, Mibe T, Miyabe M, Miyachi M, Morino Y, Muramatsu N, Murayama R, Nakatsugawa Y, Nam SI, Niiyama M, Nomachi M, Ohashi Y, Ohkuma H, Ohta T, Ooba T, Oshuev DS, Parker JD, Rangacharyulu C, Sakaguchi A, Sawada T, Shagin PM, Shiino Y, Shimizu H, Strokovsky EA, Sugaya Y, Sumihama M, Tokiyasu AO, Toi Y, Toyokawa H, Tsunemi T, Uchida M, Ungaro M, Wakai A, Wang CW, Wang SC, Yonehara K, Yorita T, Yoshimura M, Yosoi M, and Zegers RG

Abstract

The ϕ-Λ(1520) interference effect in the γp→K^{+}K^{-}p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between ϕ and Λ(1520) production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when K^{+}K^{-} pairs are observed at forward angles but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the sqrt[s]=2.1  GeV bump structure in forward differential cross sections for ϕ photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange, or rescattering processes via other hyperon states.

Published
2016
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19. Search for the Θ+ pentaquark via the π(-)p→K(-)X reaction at 1.92 GeV/c.

Author

Shirotori K, Takahashi TN, Adachi S, Agnello M, Ajimura S, Aoki K, Bhang HC, Bassalleck B, Botta E, Bufalino S, Chiga N, Evtoukhovitch P, Feliciello A, Fujioka H, Hiruma F, Honda R, Hosomi K, Ichikawa Y, Ieiri M, Igarashi Y, Imai K, Ishibashi N, Ishimoto S, Itahashi K, Iwasaki R, Joo CW, Kim MJ, Kim SJ, Kiuchi R, Koike T, Komatsu Y, Kulikov VV, Marcello S, Masumoto S, Matsuoka K, Miwa K, Moritsu M, Nagae T, Naruki M, Niiyama M, Noumi H, Ozawa K, Saito N, Sakaguchi A, Sako H, Samoilov V, Sato M, Sato S, Sato Y, Sawada S, Sekimoto M, Sugimura H, Suzuki S, Takahashi H, Takahashi T, Tamura H, Tanaka T, Tanida K, Tokiyasu AO, Tomida N, Tsamalaidze Z, Ukai M, Yagi K, Yamamoto TO, Yang SB, Yonemoto Y, Yoon CJ, and Yoshida K

Abstract

The Θ(+) pentaquark baryon was searched for via the π(-)p→K(-)X reaction with a missing mass resolution of 1.4 MeV/c(2) (FWHM) at the Japan Proton Accelerator Research Complex (J-PARC). π(-) meson beams were incident on the liquid hydrogen target with a beam momentum of 1.92 GeV/c. No peak structure corresponding to the Θ(+) mass was observed. The upper limit of the production cross section averaged over the scattering angle of 2° to 15° in the laboratory frame is obtained to be 0.26 μb/sr in the mass region of 1.51-1.55 GeV/c(2). The upper limit of the Θ(+) decay width is obtained to be 0.72 and 3.1 MeV for J(Θ)(P)=1/2(+) and J(Θ)(P)=1/2(-), respectively, using the effective Lagrangian approach.

Published
2012
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20. Production of the neutron-rich hypernucleus 10LambdaLi in the (pi-,K+) double charge-exchange reaction.

Author

Saha PK, Fukuda T, Imoto W, Ahn JK, Ajimura S, Aoki K, Bhang HC, Fujioka H, Hotchi H, Hwang JI, Itabashi T, Kang BH, Kim HD, Kim MJ, Kishimoto T, Krutenkova A, Maruta T, Miura Y, Miwa K, Nagae T, Noumi H, Outa H, Ohtaki T, Sakaguchi A, Sato Y, Sekimoto M, Shimizu Y, Tamura H, Tanida K, Toyoda A, Ukai M, and Yim HJ

Abstract

In order to produce a neutron-rich Lambda hypernucleus for the first time, we carried out an experiment by utilizing the (pi-,K+) double charge-exchange reaction on a 10B target. We observed the production of a 10LambdaLi hypernucleus. The cross section for the Lambda bound region was found to be 11.3+/-1.9 nb/sr with the 1.2 GeV/c incident momentum, which is compared with the 10LambdaB hypernucleus production cross section, 7.8+/-0.3 microb/sr, in the (pi+,K+) reaction with a 1.05 GeV/c incident momentum beam.

Published
2005
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21. Hypernuclear fine structure in (16)(Lambda)O and the LambdaN tensor interaction.

Author

Ukai M, Ajimura S, Akikawa H, Alburger DE, Banu A, Chrien RE, Franklin GB, Franz J, Hashimoto O, Hayakawa T, Hotchi H, Imai K, Kishimoto T, May M, Millener DJ, Minami S, Miura Y, Miyoshi T, Mizunuma K, Nagae T, Nakamura SN, Nakazawa K, Okayasu Y, Pile P, Quinn BP, Rusek A, Sato Y, Sutter R, Takahashi H, Tang L, Tamura H, Tanida K, Yuan L, and Zhou SH

Abstract

We have observed two gamma-ray transitions in (16)(Lambda)O from the 6.6 MeV excited 1(-)(2) state to both ground-state spin-doublet members (1(-)(1),0(-)) by the (K-,pi(-)gamma) reaction. We have obtained the ground-state doublet spacing to be 26.4+/-1.6(stat)+/-0.5(syst) keV and the excitation energy of the 1(-)(2) state to be 6561.7+/-1.1(stat)+/-1.7(syst) keV. The ground-state doublet spacing provides a small but nonzero strength of the tensor interaction between a Lambda and a nucleon. This is the first experimental result on the LambdaN tensor interaction.

Published
2004
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22. Production of (4)(double Lambda)H hypernuclei.

Author

Ahn JK, Ajimura S, Akikawa H, Bassalleck B, Berdoz A, Carman D, Chrien RE, Davis CA, Eugenio P, Fischer H, Franklin GB, Franz J, Fukuda T, Gan L, Hotchi H, Ichikawa A, Imai K, Kahana SH, Khaustov P, Kishimoto T, Koran P, Kohri H, Kourepin A, Kubota K, Landry M, May M, Meyer C, Meziani Z, Minami S, Miyachi T, Nagae T, Nakano J, Outa H, Paschke K, Pile P, Prokhabatilov M, Quinn BP, Rasin V, Rusek A, Schmitt H, Schumacher RA, Sekimoto M, Shileev K, Shimizu Y, Sutter R, Tamagawa T, Tang L, Tanida K, Yamamoto K, and Yuan L

Abstract

An experiment demonstrating the production of double-Lambda hypernuclei in (K(-),K(+)) reactions on (9)Be was carried out at the D6 line in the BNL alternating-gradient synchrotron. The technique was the observation of pions produced in sequential mesonic weak decay, each pion associated with one unit of strangeness change. The results indicate the production of a significant number of the double hypernucleus (4)(double Lambda)H and the twin hypernuclei (4)(Lambda)H and (3)(Lambda)H. The relevant decay chains are discussed and a simple model of the production mechanism is presented. An implication of this experiment is that the existence of an S = -2 dibaryon more than a few MeV below the double Lambda mass is unlikely.

Published
2001
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23. Observation of spin-orbit splitting in lambda single-particle states.

Author

Ajimura S, Hayakawa H, Kishimoto T, Kohri H, Matsuoka K, Minami S, Mori T, Morikubo K, Saji E, Sakaguchi A, Shimizu Y, Sumihama M, Chrien RE, May M, Pile P, Rusek A, Sutter R, Eugenio P, Franklin G, Khaustov P, Paschke K, Quinn BP, Schumacher RA, Franz J, Fukuda T, Noumi H, Outa H, Gan L, Tang L, Yuan L, Tamura H, Nakano J, Tamagawa T, Tanida K, and Sawafta R

Abstract

The spin-orbit splitting of Lambda single-particle states in (13)(Lambda)C was measured. The 13C(K-,pi(-))(13)(Lambda)C reaction was used to excite both the 1/2(-) and 3/2(-) states simultaneously, which have predominantly 12C(0(+)) x p(Lambda) configuration. gamma rays from the states to the ground state were measured in coincidence with the pi(-)'s, by which ls splitting was found to be 152+/-54(stat)+/-36(syst) keV. The value is 20-30 times smaller than exhibited by the ls splitting in the nuclear shell model. This value gives us new insight into the YN interaction.

Published
2001
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