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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2009.05941nucl-th
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核共振阈下$\bm{S}$波$\bm{NN}$相互作用和重子产生的性质

Nature of $\bm{S}$-wave $\bm{NN}$ interaction and dibaryon production at nucleonic resonance thresholds

V. I. Kukulin, O. A. Rubtsova, M. N. Platonova, V. N. Pomerantsev, H. Clement, T. Skorodko

摘要:

相移和非弹性参数$NN$散射在分波通道${}^3S_1$ - ${}^3D_1$和${}^1S_0$在能量$T_{\rm lab}$从零到约1 GeV内描述的统一$NN$潜在的模型,假设附近的$NN^*(1440)$阈值形成的isoscope和isovector重子共振。这些近阈值共振的证据实际上是在最近的WASA实验中发现的$NN$碰撞中的单π和双π生产。在那里,激发的Roper共振$N^*(1440)$表现出的结构中的能量依赖的总截面,这对应于形成与$I(J^π)=0(1^+)$和$1(0^+)$在$NN^*(1440)$阈值的重子态。这两个$S$波重子共振可能为了解低能量和中能量下强$NN$相互作用的本质提供了新的见解。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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