Quark models of dibaryon resonances in nucleon-nucleon scattering
Quark models of dibaryon resonances in nucleon-nucleon scattering
复制标题
核子-核子散射中二重子共振的夸克模型
DOI：
10.1103/physrevc.79.024001
复制
发表时间：
2008-06
影响因子：
3.1
通讯作者：
Wang, Fan
中科院分区：
文献类型：
--
作者：
Ping, J. L.;Huang, H. X.;Pang, H. R.;Wong, C. W.;Wang, Fan
We look for {delta}{delta} and N{delta} resonances by calculating NN scattering phase shifts of two interacting baryon clusters of quarks with explicit coupling to these dibaryon channels. Two phenomenological nonrelativistic chiral quark models giving similar low-energy NN properties are found to give significantly different dibaryon resonance structures. In the chiral quark model (ChQM), the dibaryon system does not resonate in the NNS waves, in agreement with the experimental SP07 NN partial-wave scattering amplitudes. In the quark delocalization and color screening model (QDCSM), the S-wave NN resonances disappear when the nucleon size b falls below 0.53 fm. Both quark models give an IJ{sup P}=03{sup +}{delta}{delta} resonance. At b=0.52 fm, the value favored by the baryon spectrum, the resonance mass is 2390 (2420) MeV for the ChQM with quadratic (linear) confinement, and 2360 MeV for the QDCSM. Accessible from the {sup 3}D{sub 3}{sup NN} channel, this resonance is a promising candidate for the known isoscalar ABC structure seen more clearly in the pn{yields}d{pi}{pi} production cross section at 2410 MeV in the recent preliminary data reported by the CELSIUS-WASA Collaboration. In the isovector dibaryon sector, our quark models give a bound or almost bound {sup 5}S{sub 2}{sup {delta}}{sup {delta}} state that can givemore » rise to a {sup 1}D{sub 2}{sup NN} resonance. None of the quark models used have bound N{delta}P states that might generate odd-parity resonances.« less
We look for {delta}{delta} and N{delta} resonances by calculating NN scattering phase shifts of two interacting baryon clusters of quarks with explicit coupling to these dibaryon channels. Two phenomenological nonrelativistic chiral quark models giving similar low-energy NN properties are found to give significantly different dibaryon resonance structures. In the chiral quark model (ChQM), the dibaryon system does not resonate in the NNS waves, in agreement with the experimental SP07 NN partial-wave scattering amplitudes. In the quark delocalization and color screening model (QDCSM), the S-wave NN resonances disappear when the nucleon size b falls below 0.53 fm. Both quark models give an IJ{sup P}=03{sup +}{delta}{delta} resonance. At b=0.52 fm, the value favored by the baryon spectrum, the resonance mass is 2390 (2420) MeV for the ChQM with quadratic (linear) confinement, and 2360 MeV for the QDCSM. Accessible from the {sup 3}D{sub 3}{sup NN} channel, this resonance is a promising candidate for the known isoscalar ABC structure seen more clearly in the pn{yields}d{pi}{pi} production cross section at 2410 MeV in the recent preliminary data reported by the CELSIUS-WASA Collaboration. In the isovector dibaryon sector, our quark models give a bound or almost bound {sup 5}S{sub 2}{sup {delta}}{sup {delta}} state that can givemore » rise to a {sup 1}D{sub 2}{sup NN} resonance. None of the quark models used have bound N{delta}P states that might generate odd-parity resonances.« less
登录
查看更多内容
DOI：
10.5772/intechopen.87908
发表时间：
1949
期刊：
--
影响因子：
--
作者：
Schiff Bandhyopadhyay
通讯作者：
Schiff Bandhyopadhyay
DOI：
10.1142/9789813228658_0003
发表时间：
1966
期刊：
--
影响因子：
--
作者：
K. Gottfried
通讯作者：
K. Gottfried
DOI：
10.1119/1.17836
发表时间：
1993-12
期刊：
--
影响因子：
--
作者：
S. Mcmurry;A. Someren
通讯作者：
S. Mcmurry;A. Someren
影响因子：
3.8
作者：
K. Hecht
通讯作者：
K. Hecht
DOI：
10.2307/j.ctv3f8r5s.6
发表时间：
1961
期刊：
--
影响因子：
--
作者：
A. Messiah
通讯作者：
A. Messiah