کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9851037 | 1527284 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Further study on 5q configuration states in the chiral SU(3) quark model
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The structure of the 5q configuration states with strangeness S=+1 is further studied in the chiral SU(3) quark model based on our previous work. We calculate the energies of fifteen low configurations of the 5q system, four lowest configurations of JÏ=12â with 4q partition [4]orb(0s4)[31]Ïf, four of JÏ=12+ with 4q partition [31]orb(0s30p)[4]Ïf and seven of JÏ=12+ with 4q partition [4]orb(0s30p)[31]Ïf. Some modifications are made in this further study, i.e., the orbital wave function is extended as an expansion of 4 different size harmonic oscillator forms; three various forms (quadratic, linear and error function form) of the color confinement potential are considered; the states with 4q partition [4]orb(0s30p)[31]Ïf are added, which are unnegligible in the JÏ=12+ case and were not considered in our previous paper, further the mixing between configurations [31]orb(0s30p)[4]Ïf and [4]orb(0s30p)[31]Ïf is also investigated. The results show that the T=0 state is still always the lowest one for both JÏ=12â and JÏ=12+ states, and JÏ=12â, T=0 state is always lower than that of JÏ=12+. All of these modifications can only offer several tens to hundred MeV effect, and the theoretical value of the lowest state is still about 245 MeV higher than the experimental mass of Î+. It seems to be difficult to get the calculated mass close to the observed one with the reasonable parameters in the framework of the chiral SU(3) quark model when the model space is chosen as a 5q cluster.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics A - Volume 756, Issues 1â2, 27 June 2005, Pages 215-226
Journal: Nuclear Physics A - Volume 756, Issues 1â2, 27 June 2005, Pages 215-226
نویسندگان
D. Zhang, F. Huang, Z.Y. Zhang, Y.W. Yu,