论文标题
$ \ bm {s} $ - wave $ \ bm {nn} $互动和二巴里亚人在核共振阈值下的互动和二巴里亚的生产的性质
Nature of $\bm{S}$-wave $\bm{NN}$ interaction and dibaryon production at nucleonic resonance thresholds
论文作者
论文摘要
$ nn $在部分波频道中散射$ {}^3S_1 $ - $ {}^3D_1 $和$ {}^1s_0 $在endib ynnifib $ nn $ nn $ nn nn Nn NN中描述了$ nn $的相位移位和非弹性参数。 $ nn^*（1440）$阈值附近的共鸣。实际上，在最近的WASA实验中，关于$ NN $ Collisions的单位和双杆子生产的实验实际上发现了这些接近阈值的共鸣的证据。在那里，绳索共振的激发$ n^*（1440）$在总横截面的能量依赖性中表现出结构，这对应于$ i（j^π）= 0（j^π）= 0（1^+）$和$ 1（0^+）$的形成。这两个$ s $ - 波二巴里昂的共振可能会提供对低和中级能量强的$ nn $相互作用的性质的新见解。
Phase shifts and inelasticity parameters for $NN$ scattering in the partial-wave channels ${}^3S_1$--${}^3D_1$ and ${}^1S_0$ at energies $T_{\rm lab}$ from zero to about 1 GeV are described within a unified $NN$ potential model assuming the formation of isoscalar and isovector dibaryon resonances near the $NN^*(1440)$ threshold. Evidence for these near-threshold resonances is actually found in the recent WASA experiments on single- and double-pion production in $NN$ collisions. There, the excitation of the Roper resonance $N^*(1440)$ exhibits a structure in the energy dependence of the total cross section, which corresponds to the formation of dibaryon states with $I(J^π)=0(1^+)$ and $1(0^+)$ at the $NN^*(1440)$ threshold. These two $S$-wave dibaryon resonances may provide a new insight into the nature of the strong $NN$ interaction at low and intermediate energies.
