Wolfenstein parameters for s1/2 proton knockout (p,2p) reactions

T. Noro, M. Kawabata, G. C. Hillhouse, S. Akimune, H. Akiyoshi, I. Daito, K. Hatanaka, M. Itoh, Y. Maeda, N. Matsuoka, S. Morinobu, M. Nakamura, A. Okihana, H. Sagara, H. Sakaguchi, K. Takahisa, H. Takeda, A. Tamii, K. Tamura, H. Toyokawa & 3 others H. Yamazaki, H. P. Yoshida, M. Yosoi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A complete set of Wolfenstein parameters (Di'j), induced polarizations (P), and analyzing powers (Ay) have been measured for (p,2p) reactions on Li6, C12, and Ca40 targets in order to investigate possible nuclear medium effects on the nucleon-nucleon (NN) interaction. Most of these observables show significant reductions from the values for proton-proton scattering as monotonic functions of the nuclear density relevant to these reactions. The reductions of these Di'j are reasonably reproduced by nonrelativistic plane-wave and distorted-wave calculations based on the impulse approximation, demonstrating that these suppressions are attributed to changes of the two body kinematics due to the finite separation energies of these reactions, while the reductions of Ay and P are much more prominent than the calculations. The relativistic calculations, which partly explain the Ay and P reductions, cannot reproduce the Di'j data, but all the data are consistently reproduced when the parameters of the NN interaction in a meson exchange model are renormalized, suggesting possible modifications of the NN interaction by the surrounding nuclear medium.

Original languageEnglish
Article number044604
JournalPhysical Review C - Nuclear Physics
Volume77
Issue number4
DOIs
Publication statusPublished - Apr 23 2008

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nucleon-nucleon interactions
protons
body kinematics
proton scattering
impulses
plane waves
mesons
retarding
polarization
approximation
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Noro, T. ; Kawabata, M. ; Hillhouse, G. C. ; Akimune, S. ; Akiyoshi, H. ; Daito, I. ; Hatanaka, K. ; Itoh, M. ; Maeda, Y. ; Matsuoka, N. ; Morinobu, S. ; Nakamura, M. ; Okihana, A. ; Sagara, H. ; Sakaguchi, H. ; Takahisa, K. ; Takeda, H. ; Tamii, A. ; Tamura, K. ; Toyokawa, H. ; Yamazaki, H. ; Yoshida, H. P. ; Yosoi, M. / Wolfenstein parameters for s1/2 proton knockout (p,2p) reactions. In: Physical Review C - Nuclear Physics. 2008 ; Vol. 77, No. 4.
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title = "Wolfenstein parameters for s1/2 proton knockout (p,2p) reactions",
abstract = "A complete set of Wolfenstein parameters (Di'j), induced polarizations (P), and analyzing powers (Ay) have been measured for (p,2p) reactions on Li6, C12, and Ca40 targets in order to investigate possible nuclear medium effects on the nucleon-nucleon (NN) interaction. Most of these observables show significant reductions from the values for proton-proton scattering as monotonic functions of the nuclear density relevant to these reactions. The reductions of these Di'j are reasonably reproduced by nonrelativistic plane-wave and distorted-wave calculations based on the impulse approximation, demonstrating that these suppressions are attributed to changes of the two body kinematics due to the finite separation energies of these reactions, while the reductions of Ay and P are much more prominent than the calculations. The relativistic calculations, which partly explain the Ay and P reductions, cannot reproduce the Di'j data, but all the data are consistently reproduced when the parameters of the NN interaction in a meson exchange model are renormalized, suggesting possible modifications of the NN interaction by the surrounding nuclear medium.",
author = "T. Noro and M. Kawabata and Hillhouse, {G. C.} and S. Akimune and H. Akiyoshi and I. Daito and K. Hatanaka and M. Itoh and Y. Maeda and N. Matsuoka and S. Morinobu and M. Nakamura and A. Okihana and H. Sagara and H. Sakaguchi and K. Takahisa and H. Takeda and A. Tamii and K. Tamura and H. Toyokawa and H. Yamazaki and Yoshida, {H. P.} and M. Yosoi",
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Noro, T, Kawabata, M, Hillhouse, GC, Akimune, S, Akiyoshi, H, Daito, I, Hatanaka, K, Itoh, M, Maeda, Y, Matsuoka, N, Morinobu, S, Nakamura, M, Okihana, A, Sagara, H, Sakaguchi, H, Takahisa, K, Takeda, H, Tamii, A, Tamura, K, Toyokawa, H, Yamazaki, H, Yoshida, HP & Yosoi, M 2008, 'Wolfenstein parameters for s1/2 proton knockout (p,2p) reactions', Physical Review C - Nuclear Physics, vol. 77, no. 4, 044604. https://doi.org/10.1103/PhysRevC.77.044604

Wolfenstein parameters for s1/2 proton knockout (p,2p) reactions. / Noro, T.; Kawabata, M.; Hillhouse, G. C.; Akimune, S.; Akiyoshi, H.; Daito, I.; Hatanaka, K.; Itoh, M.; Maeda, Y.; Matsuoka, N.; Morinobu, S.; Nakamura, M.; Okihana, A.; Sagara, H.; Sakaguchi, H.; Takahisa, K.; Takeda, H.; Tamii, A.; Tamura, K.; Toyokawa, H.; Yamazaki, H.; Yoshida, H. P.; Yosoi, M.

In: Physical Review C - Nuclear Physics, Vol. 77, No. 4, 044604, 23.04.2008.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Wolfenstein parameters for s1/2 proton knockout (p,2p) reactions

AU - Noro, T.

AU - Kawabata, M.

AU - Hillhouse, G. C.

AU - Akimune, S.

AU - Akiyoshi, H.

AU - Daito, I.

AU - Hatanaka, K.

AU - Itoh, M.

AU - Maeda, Y.

AU - Matsuoka, N.

AU - Morinobu, S.

AU - Nakamura, M.

AU - Okihana, A.

AU - Sagara, H.

AU - Sakaguchi, H.

AU - Takahisa, K.

AU - Takeda, H.

AU - Tamii, A.

AU - Tamura, K.

AU - Toyokawa, H.

AU - Yamazaki, H.

AU - Yoshida, H. P.

AU - Yosoi, M.

PY - 2008/4/23

Y1 - 2008/4/23

N2 - A complete set of Wolfenstein parameters (Di'j), induced polarizations (P), and analyzing powers (Ay) have been measured for (p,2p) reactions on Li6, C12, and Ca40 targets in order to investigate possible nuclear medium effects on the nucleon-nucleon (NN) interaction. Most of these observables show significant reductions from the values for proton-proton scattering as monotonic functions of the nuclear density relevant to these reactions. The reductions of these Di'j are reasonably reproduced by nonrelativistic plane-wave and distorted-wave calculations based on the impulse approximation, demonstrating that these suppressions are attributed to changes of the two body kinematics due to the finite separation energies of these reactions, while the reductions of Ay and P are much more prominent than the calculations. The relativistic calculations, which partly explain the Ay and P reductions, cannot reproduce the Di'j data, but all the data are consistently reproduced when the parameters of the NN interaction in a meson exchange model are renormalized, suggesting possible modifications of the NN interaction by the surrounding nuclear medium.

AB - A complete set of Wolfenstein parameters (Di'j), induced polarizations (P), and analyzing powers (Ay) have been measured for (p,2p) reactions on Li6, C12, and Ca40 targets in order to investigate possible nuclear medium effects on the nucleon-nucleon (NN) interaction. Most of these observables show significant reductions from the values for proton-proton scattering as monotonic functions of the nuclear density relevant to these reactions. The reductions of these Di'j are reasonably reproduced by nonrelativistic plane-wave and distorted-wave calculations based on the impulse approximation, demonstrating that these suppressions are attributed to changes of the two body kinematics due to the finite separation energies of these reactions, while the reductions of Ay and P are much more prominent than the calculations. The relativistic calculations, which partly explain the Ay and P reductions, cannot reproduce the Di'j data, but all the data are consistently reproduced when the parameters of the NN interaction in a meson exchange model are renormalized, suggesting possible modifications of the NN interaction by the surrounding nuclear medium.

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U2 - 10.1103/PhysRevC.77.044604

DO - 10.1103/PhysRevC.77.044604

M3 - Article

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JO - Physical Review C - Nuclear Physics

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M1 - 044604

ER -