arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1805.04534nucl-thhep-phnucl-ex
收藏

共振区$S=-1$介子-重子散射的S波和p波结构

S- and p-wave structure of $S=-1$ meson-baryon scattering in the resonance region

D. Sadasivan, M. Mai, M. Doring

摘要:

利用低能实验数据对$S=-1$介子-重子散射振幅的s波和p波进行了同时分析。对于第一次,微分截面数据包括手性酉耦合通道模型。从这个模型中提取了s波和p波振幅,我们观察到了著名的$I(J^P)=0(1/2^-)$ s波态以及一个新的$I(J^P)=1(1/2^+)$态,该态在夸克模型和格点量子色动力学结果中是不存在的。多重统计和现象学检验表明,虽然数据明确要求$I=1$ p波共振,但新状态只是解释了模型中十重态$Σ(1385)3/2^+$的缺失。

英文摘要:

We perform a simultaneous analysis of s- and p-waves of the $S=-1$ meson-baryon scattering amplitude using all low-energy experimental data. For the first time, differential cross section data are included for chiral unitary coupled-channel models. From this model s- and p-wave amplitudes are extracted and we observe both well-known $I(J^P)=0(1/2^-)$ s-wave states as well as a new $I(J^P)=1(1/2^+)$ state absent in quark models and lattice QCD results. Multiple statistical and phenomenological tests suggest that, while the data clearly require an $I=1$ p-wave resonance, the new state just accounts for the absence of the decuplet $Σ(1385)3/2^+$ in the model.

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。

↑