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arXiv 1608.04285nucl-ex
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质子-氘核碰撞中的相干π介子产生

Coherent pion production in proton-deuteron collisions

S. Dymov, V. Shmakova, D. Mchedlishvili, T. Azaryan, S. Barsov, A. Dzyuba, R. Engels, R. Gebel, P. Goslawski, B. Gou, K. Grigoryev, M. Hartmann, A. Kacharava, V… 展开作者

S. Dymov, V. Shmakova, D. Mchedlishvili, T. Azaryan, S. Barsov, A. Dzyuba, R. Engels, R. Gebel, P. Goslawski, B. Gou, K. Grigoryev, M. Hartmann, A. Kacharava, V. Komarov, A. Khoukaz, P. Kulessa, A. Kulikov, V. Kurbatov, N. Lomidze, B. Lorentz, G. Macharashvili, S. Merzliakov, M. Mielke, S. Mikirtytchiants, M. Nioradze, H. Ohm, M. Papenbrock, D. Prasuhn, F. Rathmann, V. Serdyuk, H. Seyfarth, H. Ströher, M. Tabidze, S. Trusov, D. Tsirkov, Yu. Uzikov, Yu. Valdau, C. Wilkin, P. Wüstner

摘要:

用极化质子束入射氘团簇-喷流靶和极化氘束入射充满极化氢的靶室,得到了350-360 MeV/核子的$pd\to{}^{3}\textrm{He}\,π^0/^{3}\textrm{H}\,π^+$反应的质子分析本领值。这些结果具有比现有数据大得多的角覆盖。首次测量了氘矢量分析能力和氘质子自旋关联。在600 MeV/核子的小角度下,也获得了氘-质子自旋相关和质子分析能力的数据,尽管即使使用氘束,在这个能量下的角覆盖范围也受到更大的限制。通过将自旋关联的前向或后向外推值与已发表的氘核张量分析功率的测量值相结合,计算了两个非零振幅之间的相对相位。

英文摘要:

Values of the proton analysing power in the $pd\to{}^{3}\textrm{He}\,π^0/^{3}\textrm{H}\,π^+$ reactions at 350-360~MeV per nucleon were obtained by using a polarised proton beam incident on a deuterium cluster-jet target and with a polarised deuteron beam incident on a target cell filled with polarised hydrogen. These results have a much larger angular coverage than existing data. First measurements are also presented of the deuteron vector analysing power and the deuteron-proton spin correlations. Data were also obtained on the deuteron-proton spin correlation and proton analysing power at small angles at 600~MeV per nucleon, though the angular coverage at this energy was much more restricted even when using a deuteron beam. By combining the extrapolated values of the spin correlations to the forward or backward directions with published measurements of the deuteron tensor analysing powers, the relative phases between the two non-vanishing amplitudes were evaluated.

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