标题： pn → pn π0 π0 / pn → d π0 π0 跨截面比的估计 显示英文标题

标题： Estimation of the ratio of the pn -> pn pi0 pi0/pn -> d pi0 pi0 cross sections

摘要： 最近有证据表明存在一个质量为2380 MeV/c^2，宽度为70 MeV/c^2的双核子态，它强衰变为d pi0 pi0通道 [M. Bashkanov等，Phys.Rev.Lett. 102 (2009) 052301; P. Adlarson等，arXiv:1104.0123]。 通过使用最终态相互作用理论，以一种弱模型依赖的方式估计了这种假设的双核子态衰变为{pn}_{I=0}pi0 pi0通道的衰变率。 结果表明，如果该共振态存在，那么它在该通道中的表现应与d pi0 pi0通道一样强烈。 这两个衰变模式的总和将覆盖2380 MeV/c^2区域中相关部分波预测的大部分非弹性。 显示英文摘要

摘要： Evidence has recently been presented for the existence of a dibaryon of mass 2380 MeV/c^2 and width 70 MeV/c^2, which decays strongly into the d pi0 pi0 channel [M. Bashkanov et al., Phys.Rev.Lett. 102 (2009) 052301; P. Adlarson et al., arXiv:1104.0123]. The decay rate of such a hypothesised dibaryon into the {pn}_{I=0} pi0 pi0 channel is estimated in a weakly model-dependent way by using final state interaction theory. It is shown that, if the resonance exists, it should then show up as strongly in this channel as in d pi0 pi0. The sum of the two decay modes would saturate most of the inelasticity predicted in the relevant partial waves in the 2380 MeV/c^2 region.