Study of the pionic enhancement in 16O(p, p′) 16O(0-, T = 1) at 295 MeV

T. Wakasa; G. P.A. Berg; H. Fujimura; K. Fujita; K. Hatanaka; M. Ichimura; M. Itoh; J. Kamiya; T. Kawabata; Y. Kitamura; E. Obayashi; H. Sakaguchi; N. Sakamoto; Y. Sakemi; Y. Shimizu; H. Takeda; M. Uchida; Y. Yasuda; H. P. Yoshida; M. Yosoi

doi:10.1016/j.physletb.2005.11.009

Study of the pionic enhancement in ¹⁶O(p, p′) ¹⁶O(0^-, T = 1) at 295 MeV

T. Wakasa, G. P.A. Berg, H. Fujimura, K. Fujita, K. Hatanaka, M. Ichimura, M. Itoh, J. Kamiya, T. Kawabata, Y. Kitamura, E. Obayashi, H. Sakaguchi, N. Sakamoto, Y. Sakemi, Y. Shimizu, H. Takeda, M. Uchida, Y. Yasuda, H. P. Yoshida, M. Yosoi

Experimental Particle Physics

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Abstract

The cross section of the O16(p,p′)O16(0-,T=1) scattering was measured at a bombarding energy of 295 MeV in the momentum transfer range of 1.0fm-1≤qc.m.≤2.1fm-1. The isovector 0- state at Ex=12.8MeV is clearly separated from its neighboring states owing to the high energy resolution of about 30 keV. The cross section data were compared with distorted wave impulse approximation (DWIA) calculations employing shell-model wave functions. The observed cross sections around qc.m.≃1.7fm-1 are significantly larger than obtained by these calculations, suggesting pionic enhancement as a precursor of pion condensation in nuclei. The data are well reproduced by DWIA calculations using random phase approximation response functions including the Δ isobar that predict pionic enhancement.

Original language	English
Pages (from-to)	485-489
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	632
Issue number	4
DOIs	https://doi.org/10.1016/j.physletb.2005.11.009
Publication status	Published - Jan 19 2006

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/j.physletb.2005.11.009

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Wakasa, T., Berg, G. P. A., Fujimura, H., Fujita, K., Hatanaka, K., Ichimura, M., Itoh, M., Kamiya, J., Kawabata, T., Kitamura, Y., Obayashi, E., Sakaguchi, H., Sakamoto, N., Sakemi, Y., Shimizu, Y., Takeda, H., Uchida, M., Yasuda, Y., Yoshida, H. P., & Yosoi, M. (2006). Study of the pionic enhancement in ¹⁶O(p, p′) ¹⁶O(0^-, T = 1) at 295 MeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 632(4), 485-489. https://doi.org/10.1016/j.physletb.2005.11.009

Wakasa, T, Berg, GPA, Fujimura, H, Fujita, K, Hatanaka, K, Ichimura, M, Itoh, M, Kamiya, J, Kawabata, T, Kitamura, Y, Obayashi, E, Sakaguchi, H, Sakamoto, N, Sakemi, Y, Shimizu, Y, Takeda, H, Uchida, M, Yasuda, Y, Yoshida, HP & Yosoi, M 2006, 'Study of the pionic enhancement in ¹⁶O(p, p′) ¹⁶O(0^-, T = 1) at 295 MeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 632, no. 4, pp. 485-489. https://doi.org/10.1016/j.physletb.2005.11.009

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title = "Study of the pionic enhancement in 16O(p, p′) 16O(0-, T = 1) at 295 MeV",

abstract = "The cross section of the O16(p,p′)O16(0-,T=1) scattering was measured at a bombarding energy of 295 MeV in the momentum transfer range of 1.0fm-1≤qc.m.≤2.1fm-1. The isovector 0- state at Ex=12.8MeV is clearly separated from its neighboring states owing to the high energy resolution of about 30 keV. The cross section data were compared with distorted wave impulse approximation (DWIA) calculations employing shell-model wave functions. The observed cross sections around qc.m.≃1.7fm-1 are significantly larger than obtained by these calculations, suggesting pionic enhancement as a precursor of pion condensation in nuclei. The data are well reproduced by DWIA calculations using random phase approximation response functions including the Δ isobar that predict pionic enhancement.",

author = "T. Wakasa and Berg, {G. P.A.} and H. Fujimura and K. Fujita and K. Hatanaka and M. Ichimura and M. Itoh and J. Kamiya and T. Kawabata and Y. Kitamura and E. Obayashi and H. Sakaguchi and N. Sakamoto and Y. Sakemi and Y. Shimizu and H. Takeda and M. Uchida and Y. Yasuda and Yoshida, {H. P.} and M. Yosoi",

note = "Funding Information: We thank the RCNP cyclotron crew for providing a good quality beam. This work was supported in part by the Grants-in-Aid for Scientific Research Nos. 12740151 and 14702005 of the Ministry of Education, Culture, Sports, Science, and Technology of Japan.",

year = "2006",

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doi = "10.1016/j.physletb.2005.11.009",

language = "English",

volume = "632",

pages = "485--489",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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T1 - Study of the pionic enhancement in 16O(p, p′) 16O(0-, T = 1) at 295 MeV

AU - Wakasa, T.

AU - Berg, G. P.A.

AU - Fujimura, H.

AU - Fujita, K.

AU - Hatanaka, K.

AU - Ichimura, M.

AU - Itoh, M.

AU - Kamiya, J.

AU - Kawabata, T.

AU - Kitamura, Y.

AU - Obayashi, E.

AU - Sakaguchi, H.

AU - Sakamoto, N.

AU - Sakemi, Y.

AU - Shimizu, Y.

AU - Takeda, H.

AU - Uchida, M.

AU - Yasuda, Y.

AU - Yoshida, H. P.

AU - Yosoi, M.

N1 - Funding Information: We thank the RCNP cyclotron crew for providing a good quality beam. This work was supported in part by the Grants-in-Aid for Scientific Research Nos. 12740151 and 14702005 of the Ministry of Education, Culture, Sports, Science, and Technology of Japan.

PY - 2006/1/19

Y1 - 2006/1/19

N2 - The cross section of the O16(p,p′)O16(0-,T=1) scattering was measured at a bombarding energy of 295 MeV in the momentum transfer range of 1.0fm-1≤qc.m.≤2.1fm-1. The isovector 0- state at Ex=12.8MeV is clearly separated from its neighboring states owing to the high energy resolution of about 30 keV. The cross section data were compared with distorted wave impulse approximation (DWIA) calculations employing shell-model wave functions. The observed cross sections around qc.m.≃1.7fm-1 are significantly larger than obtained by these calculations, suggesting pionic enhancement as a precursor of pion condensation in nuclei. The data are well reproduced by DWIA calculations using random phase approximation response functions including the Δ isobar that predict pionic enhancement.

AB - The cross section of the O16(p,p′)O16(0-,T=1) scattering was measured at a bombarding energy of 295 MeV in the momentum transfer range of 1.0fm-1≤qc.m.≤2.1fm-1. The isovector 0- state at Ex=12.8MeV is clearly separated from its neighboring states owing to the high energy resolution of about 30 keV. The cross section data were compared with distorted wave impulse approximation (DWIA) calculations employing shell-model wave functions. The observed cross sections around qc.m.≃1.7fm-1 are significantly larger than obtained by these calculations, suggesting pionic enhancement as a precursor of pion condensation in nuclei. The data are well reproduced by DWIA calculations using random phase approximation response functions including the Δ isobar that predict pionic enhancement.

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ER -

Study of the pionic enhancement in ¹⁶O(p, p′) ¹⁶O(0^-, T = 1) at 295 MeV

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