Cross section and complete set of proton spin observables in pd elastic scattering at 250 MeV

K. Hatanaka, Y. Shimizu, D. Hirooka, J. Kamiya, Y. Kitamura, Y. Maeda, Tetsuo Noro, E. Obayashi, K. Sagara, T. Saito, H. Sakai, Y. Sakemi, K. Sekiguchi, A. Tamii, Tomotsugu Wakasa, T. Yagita, K. Yako, H. P. Yoshida, V. P. Ladygin, H. KamadaW. Glöckle, J. Golak, A. Nogga, H. Witała

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Abstract

The angular distributions of the cross section, the proton analyzing power, and all proton polarization transfer coefficients of pd elastic scattering were measured at 250 MeV. The range of center-of-mass angles was 10°-165° for the cross section and the analyzing power, and about 10°-95° for the polarization transfer coefficients. These are the first measurements of a complete set of proton polarization observables for pd elastic scattering at intermediate energies. The present data are compared with theoretical predictions based on exact solutions of the three-nucleon Faddeev equations and modern realistic nucleon-nucleon potentials combined with three-nucleon forces (3NF), namely, the Tucson-Melbourne (TM) 2π-exchange model, a modification thereof (TM′) closer to chiral symmetry, and the Urbana IX model. Large effects of the three-nucleon forces are predicted. The inclusion of the three-nucleon forces gives a good description of the cross section at angles below the minimum. However, appreciable discrepancies between the data and predictions remain at backward angles. For the spin observables the predictions of rise TM 3NF model deviate strongly from the other two 3NF models, which are close together, except for Kyy′. In the case of the analyzing power all 3NF models fail to describe the data at the upper half of the angular range. In the restricted measured angular range the polarization transfer coefficients are fairly well described by the TM′ and Urbana IX 3NF models, whereas the TM 3NF model mostly fails. The transfer coefficient Kyy′ is best described by the Urbana IX but the theoretical description is still insufficient to reproduce the experimental data. These results call for a better understanding of the spin structure of the three-nucleon force and very likely for a full relativistic treatment of the three-nucleon continuum.

Original languageEnglish
Article number044002
Pages (from-to)440021-4400210
Number of pages3960190
JournalPhysical Review C - Nuclear Physics
Volume66
Issue number4
DOIs
Publication statusPublished - Oct 1 2002

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elastic scattering
protons
cross sections
polarization
coefficients
predictions
Faddeev equations
nucleon potential
center of mass
angular distribution
inclusions
continuums
symmetry
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Hatanaka, K., Shimizu, Y., Hirooka, D., Kamiya, J., Kitamura, Y., Maeda, Y., ... Witała, H. (2002). Cross section and complete set of proton spin observables in pd elastic scattering at 250 MeV. Physical Review C - Nuclear Physics, 66(4), 440021-4400210. [044002]. https://doi.org/10.1103/PhysRevC.66.044002

Cross section and complete set of proton spin observables in pd elastic scattering at 250 MeV. / Hatanaka, K.; Shimizu, Y.; Hirooka, D.; Kamiya, J.; Kitamura, Y.; Maeda, Y.; Noro, Tetsuo; Obayashi, E.; Sagara, K.; Saito, T.; Sakai, H.; Sakemi, Y.; Sekiguchi, K.; Tamii, A.; Wakasa, Tomotsugu; Yagita, T.; Yako, K.; Yoshida, H. P.; Ladygin, V. P.; Kamada, H.; Glöckle, W.; Golak, J.; Nogga, A.; Witała, H.

In: Physical Review C - Nuclear Physics, Vol. 66, No. 4, 044002, 01.10.2002, p. 440021-4400210.

Research output: Contribution to journalArticle

Hatanaka, K, Shimizu, Y, Hirooka, D, Kamiya, J, Kitamura, Y, Maeda, Y, Noro, T, Obayashi, E, Sagara, K, Saito, T, Sakai, H, Sakemi, Y, Sekiguchi, K, Tamii, A, Wakasa, T, Yagita, T, Yako, K, Yoshida, HP, Ladygin, VP, Kamada, H, Glöckle, W, Golak, J, Nogga, A & Witała, H 2002, 'Cross section and complete set of proton spin observables in pd elastic scattering at 250 MeV', Physical Review C - Nuclear Physics, vol. 66, no. 4, 044002, pp. 440021-4400210. https://doi.org/10.1103/PhysRevC.66.044002
Hatanaka K, Shimizu Y, Hirooka D, Kamiya J, Kitamura Y, Maeda Y et al. Cross section and complete set of proton spin observables in pd elastic scattering at 250 MeV. Physical Review C - Nuclear Physics. 2002 Oct 1;66(4):440021-4400210. 044002. https://doi.org/10.1103/PhysRevC.66.044002
Hatanaka, K. ; Shimizu, Y. ; Hirooka, D. ; Kamiya, J. ; Kitamura, Y. ; Maeda, Y. ; Noro, Tetsuo ; Obayashi, E. ; Sagara, K. ; Saito, T. ; Sakai, H. ; Sakemi, Y. ; Sekiguchi, K. ; Tamii, A. ; Wakasa, Tomotsugu ; Yagita, T. ; Yako, K. ; Yoshida, H. P. ; Ladygin, V. P. ; Kamada, H. ; Glöckle, W. ; Golak, J. ; Nogga, A. ; Witała, H. / Cross section and complete set of proton spin observables in pd elastic scattering at 250 MeV. In: Physical Review C - Nuclear Physics. 2002 ; Vol. 66, No. 4. pp. 440021-4400210.
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abstract = "The angular distributions of the cross section, the proton analyzing power, and all proton polarization transfer coefficients of p→d elastic scattering were measured at 250 MeV. The range of center-of-mass angles was 10°-165° for the cross section and the analyzing power, and about 10°-95° for the polarization transfer coefficients. These are the first measurements of a complete set of proton polarization observables for p→d elastic scattering at intermediate energies. The present data are compared with theoretical predictions based on exact solutions of the three-nucleon Faddeev equations and modern realistic nucleon-nucleon potentials combined with three-nucleon forces (3NF), namely, the Tucson-Melbourne (TM) 2π-exchange model, a modification thereof (TM′) closer to chiral symmetry, and the Urbana IX model. Large effects of the three-nucleon forces are predicted. The inclusion of the three-nucleon forces gives a good description of the cross section at angles below the minimum. However, appreciable discrepancies between the data and predictions remain at backward angles. For the spin observables the predictions of rise TM 3NF model deviate strongly from the other two 3NF models, which are close together, except for Kyy′. In the case of the analyzing power all 3NF models fail to describe the data at the upper half of the angular range. In the restricted measured angular range the polarization transfer coefficients are fairly well described by the TM′ and Urbana IX 3NF models, whereas the TM 3NF model mostly fails. The transfer coefficient Kyy′ is best described by the Urbana IX but the theoretical description is still insufficient to reproduce the experimental data. These results call for a better understanding of the spin structure of the three-nucleon force and very likely for a full relativistic treatment of the three-nucleon continuum.",
author = "K. Hatanaka and Y. Shimizu and D. Hirooka and J. Kamiya and Y. Kitamura and Y. Maeda and Tetsuo Noro and E. Obayashi and K. Sagara and T. Saito and H. Sakai and Y. Sakemi and K. Sekiguchi and A. Tamii and Tomotsugu Wakasa and T. Yagita and K. Yako and Yoshida, {H. P.} and Ladygin, {V. P.} and H. Kamada and W. Gl{\"o}ckle and J. Golak and A. Nogga and H. Witała",
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AU - Hatanaka, K.

AU - Shimizu, Y.

AU - Hirooka, D.

AU - Kamiya, J.

AU - Kitamura, Y.

AU - Maeda, Y.

AU - Noro, Tetsuo

AU - Obayashi, E.

AU - Sagara, K.

AU - Saito, T.

AU - Sakai, H.

AU - Sakemi, Y.

AU - Sekiguchi, K.

AU - Tamii, A.

AU - Wakasa, Tomotsugu

AU - Yagita, T.

AU - Yako, K.

AU - Yoshida, H. P.

AU - Ladygin, V. P.

AU - Kamada, H.

AU - Glöckle, W.

AU - Golak, J.

AU - Nogga, A.

AU - Witała, H.

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N2 - The angular distributions of the cross section, the proton analyzing power, and all proton polarization transfer coefficients of p→d elastic scattering were measured at 250 MeV. The range of center-of-mass angles was 10°-165° for the cross section and the analyzing power, and about 10°-95° for the polarization transfer coefficients. These are the first measurements of a complete set of proton polarization observables for p→d elastic scattering at intermediate energies. The present data are compared with theoretical predictions based on exact solutions of the three-nucleon Faddeev equations and modern realistic nucleon-nucleon potentials combined with three-nucleon forces (3NF), namely, the Tucson-Melbourne (TM) 2π-exchange model, a modification thereof (TM′) closer to chiral symmetry, and the Urbana IX model. Large effects of the three-nucleon forces are predicted. The inclusion of the three-nucleon forces gives a good description of the cross section at angles below the minimum. However, appreciable discrepancies between the data and predictions remain at backward angles. For the spin observables the predictions of rise TM 3NF model deviate strongly from the other two 3NF models, which are close together, except for Kyy′. In the case of the analyzing power all 3NF models fail to describe the data at the upper half of the angular range. In the restricted measured angular range the polarization transfer coefficients are fairly well described by the TM′ and Urbana IX 3NF models, whereas the TM 3NF model mostly fails. The transfer coefficient Kyy′ is best described by the Urbana IX but the theoretical description is still insufficient to reproduce the experimental data. These results call for a better understanding of the spin structure of the three-nucleon force and very likely for a full relativistic treatment of the three-nucleon continuum.

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