Polarizations for proton knockout reactions from s1/2 orbits at 1 GeV

V. A. Andreev; M. N. Andronenko; G. M. Amalsky; S. L. Belostotski; O. A. Domchenkov; O. Ya Fedorov; K. Hatanaka; A. A. Izotov; A. A. Jgoun; J. Kamiya; A. Yu Kisselev; M. A. Kopytin; O. V. Miklukho; Yu G. Naryshkin; T. Noro; E. Obayashi; A. N. Prokofiev; D. A. Prokofiev; H. Sakaguchi; V. V. Sulimov; A. V. Shvedchikov; H. Takeda; S. I. Trush; V. V. Vikhrov; T. Wakasa; Y. Yasuda; H. P. Yoshida; A. Zhdanov

Polarizations for proton knockout reactions from s_1/2 orbits at 1 GeV

V. A. Andreev, M. N. Andronenko, G. M. Amalsky, S. L. Belostotski, O. A. Domchenkov, O. Ya Fedorov, K. Hatanaka, A. A. Izotov, A. A. Jgoun, J. Kamiya, A. Yu Kisselev, M. A. Kopytin, O. V. Miklukho, Yu G. Naryshkin, T. Noro, E. Obayashi, A. N. Prokofiev, D. A. Prokofiev, H. Sakaguchi, V. V. SulimovA. V. Shvedchikov, H. Takeda, S. I. Trush, V. V. Vikhrov, T. Wakasa, Y. Yasuda, H. P. Yoshida, A. Zhdanov

Experimental Particle Physics

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19 Citations (Scopus)

Abstract

The polarization of protons emitted in (p,2p) reactions has been measured for three kinds of targets at 1 GeV. The values of the polarization that we obtain are significantly smaller than the values predicted using the nucleon-nucleon (NN) interaction in free space, and the discrepancy between the two is seen to increase monotonically as a function of the effective mean density, which is defined as a measure of the sensitivity of a reaction to density-dependent terms of the interaction. The experimental data are also compared with a model calculation that includes a relativistic effect, and it is found that inclusion of this effect is able to account for about half of the density-dependent discrepancy between the experimental results and the values predicted with the free space NN interaction. These results, in conjunction with the previous results at 392 MeV, indicate that this discrepancy is not caused by a contribution of multistep processes and provide further evidence that there exists a medium effect.

Original language	English
Article number	024604
Pages (from-to)	246041-246047
Number of pages	7
Journal	Physical Review C - Nuclear Physics
Volume	69
Issue number	2
Publication status	Published - Feb 2004

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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Andreev, V. A., Andronenko, M. N., Amalsky, G. M., Belostotski, S. L., Domchenkov, O. A., Fedorov, O. Y., Hatanaka, K., Izotov, A. A., Jgoun, A. A., Kamiya, J., Kisselev, A. Y., Kopytin, M. A., Miklukho, O. V., Naryshkin, Y. G., Noro, T., Obayashi, E., Prokofiev, A. N., Prokofiev, D. A., Sakaguchi, H., ... Zhdanov, A. (2004). Polarizations for proton knockout reactions from s_1/2 orbits at 1 GeV. Physical Review C - Nuclear Physics, 69(2), 246041-246047. Article 024604.

Andreev, VA, Andronenko, MN, Amalsky, GM, Belostotski, SL, Domchenkov, OA, Fedorov, OY, Hatanaka, K, Izotov, AA, Jgoun, AA, Kamiya, J, Kisselev, AY, Kopytin, MA, Miklukho, OV, Naryshkin, YG, Noro, T, Obayashi, E, Prokofiev, AN, Prokofiev, DA, Sakaguchi, H, Sulimov, VV, Shvedchikov, AV, Takeda, H, Trush, SI, Vikhrov, VV, Wakasa, T, Yasuda, Y, Yoshida, HP & Zhdanov, A 2004, 'Polarizations for proton knockout reactions from s_1/2 orbits at 1 GeV', Physical Review C - Nuclear Physics, vol. 69, no. 2, 024604, pp. 246041-246047.

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title = "Polarizations for proton knockout reactions from s1/2 orbits at 1 GeV",

abstract = "The polarization of protons emitted in (p,2p) reactions has been measured for three kinds of targets at 1 GeV. The values of the polarization that we obtain are significantly smaller than the values predicted using the nucleon-nucleon (NN) interaction in free space, and the discrepancy between the two is seen to increase monotonically as a function of the effective mean density, which is defined as a measure of the sensitivity of a reaction to density-dependent terms of the interaction. The experimental data are also compared with a model calculation that includes a relativistic effect, and it is found that inclusion of this effect is able to account for about half of the density-dependent discrepancy between the experimental results and the values predicted with the free space NN interaction. These results, in conjunction with the previous results at 392 MeV, indicate that this discrepancy is not caused by a contribution of multistep processes and provide further evidence that there exists a medium effect.",

author = "Andreev, {V. A.} and Andronenko, {M. N.} and Amalsky, {G. M.} and Belostotski, {S. L.} and Domchenkov, {O. A.} and Fedorov, {O. Ya} and K. Hatanaka and Izotov, {A. A.} and Jgoun, {A. A.} and J. Kamiya and Kisselev, {A. Yu} and Kopytin, {M. A.} and Miklukho, {O. V.} and Naryshkin, {Yu G.} and T. Noro and E. Obayashi and Prokofiev, {A. N.} and Prokofiev, {D. A.} and H. Sakaguchi and Sulimov, {V. V.} and Shvedchikov, {A. V.} and H. Takeda and Trush, {S. I.} and Vikhrov, {V. V.} and T. Wakasa and Y. Yasuda and Yoshida, {H. P.} and A. Zhdanov",

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language = "English",

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T1 - Polarizations for proton knockout reactions from s1/2 orbits at 1 GeV

AU - Andreev, V. A.

AU - Andronenko, M. N.

AU - Amalsky, G. M.

AU - Belostotski, S. L.

AU - Domchenkov, O. A.

AU - Fedorov, O. Ya

AU - Hatanaka, K.

AU - Izotov, A. A.

AU - Jgoun, A. A.

AU - Kamiya, J.

AU - Kisselev, A. Yu

AU - Kopytin, M. A.

AU - Miklukho, O. V.

AU - Naryshkin, Yu G.

AU - Noro, T.

AU - Obayashi, E.

AU - Prokofiev, A. N.

AU - Prokofiev, D. A.

AU - Sakaguchi, H.

AU - Sulimov, V. V.

AU - Shvedchikov, A. V.

AU - Takeda, H.

AU - Trush, S. I.

AU - Vikhrov, V. V.

AU - Wakasa, T.

AU - Yasuda, Y.

AU - Yoshida, H. P.

AU - Zhdanov, A.

PY - 2004/2

Y1 - 2004/2

N2 - The polarization of protons emitted in (p,2p) reactions has been measured for three kinds of targets at 1 GeV. The values of the polarization that we obtain are significantly smaller than the values predicted using the nucleon-nucleon (NN) interaction in free space, and the discrepancy between the two is seen to increase monotonically as a function of the effective mean density, which is defined as a measure of the sensitivity of a reaction to density-dependent terms of the interaction. The experimental data are also compared with a model calculation that includes a relativistic effect, and it is found that inclusion of this effect is able to account for about half of the density-dependent discrepancy between the experimental results and the values predicted with the free space NN interaction. These results, in conjunction with the previous results at 392 MeV, indicate that this discrepancy is not caused by a contribution of multistep processes and provide further evidence that there exists a medium effect.

AB - The polarization of protons emitted in (p,2p) reactions has been measured for three kinds of targets at 1 GeV. The values of the polarization that we obtain are significantly smaller than the values predicted using the nucleon-nucleon (NN) interaction in free space, and the discrepancy between the two is seen to increase monotonically as a function of the effective mean density, which is defined as a measure of the sensitivity of a reaction to density-dependent terms of the interaction. The experimental data are also compared with a model calculation that includes a relativistic effect, and it is found that inclusion of this effect is able to account for about half of the density-dependent discrepancy between the experimental results and the values predicted with the free space NN interaction. These results, in conjunction with the previous results at 392 MeV, indicate that this discrepancy is not caused by a contribution of multistep processes and provide further evidence that there exists a medium effect.

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ER -

Polarizations for proton knockout reactions from s_1/2 orbits at 1 GeV

Abstract

All Science Journal Classification (ASJC) codes

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