Abstract Near-threshold incoherent pion photoproduction on the deuteron including final-state rescattering effects is investigated with special emphasize on the beam-target double spin asymmetries. The elementary γ N → π N amplitude is taken from the unitary isobar MAID-2007 model which describes well the threshold region. We present the first results on all possible double spin asymmetries of the differential and total cross sections for both the charged- and neutral-pion production channels near threshold. We discuss the sensitivity of the estimated results to the N N and π N final-state rescattering effects. It turns out that the role of N N -rescattering is significant, and its inclusion strongly affected the results for double spin asymmetries in the charged- and neutral-pion channels. We also find that the π N -rescattering effect is insignificant in the case of charged-pion channels, whereas it has a noticeable contribution on most of double spin asymmetries in the neutral-pion channel.

中文翻译：

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反应中的光束-目标双自旋不对称性 γ→d→→πNN 接近阈值并具有终态再散射效应

摘要 研究了氘核上的近阈值非相干π介子光产生，包括终态再散射效应，特别强调了束-靶双自旋不对称性。基本γ N → π N 振幅取自统一等压线 MAID-2007 模型，该模型很好地描述了阈值区域。我们展示了接近阈值的带电和中性 pion 生产通道的微分和总横截面的所有可能的双自旋不对称性的第一个结果。我们讨论了估计结果对 NN 和 π N 终态再散射效应的敏感性。事实证明，NN - 再散射的作用很重要，它的包含强烈影响了带电和中性介子通道中双自旋不对称的结果。