具有双Y-型结构的θ^+的研究(英文)

θ^+with Double Y-Ansatz Confining Potential

采用由单胶子交换产生的库仑势加上流管模型给出的双Y-型禁闭势之和的相互作用势,分别计算了正、负字称态的(?)+的质量,给出负宇称态(?)+的质量为1．935GeV,正宇称态(?)+的质量为2．082GeV．其中较低的负宇称态仍比实验给出的(?)+(1540)的共振峰高出近400MeV．

The mass of Θ^＋ in the qq--q-qq configuration is calculated by using a potential composed by a Coulomb potential originated from the One Gluon Exchange （OGE） and a double Y-mode confining potential extracted from the flux tube model. It is shown that the mass of the negative parity state of Θ^＋is 1.935GeV, which is more than 300MeV higher than the reported experimental value of 1.540GeV. While the positive parity state of Θ^＋ has a mass of 2.082GeV, which is consistent with the result from the Lattice Quantum Chromodynamics （LQCD） calculation. With these masses, the reported Θ^＋（1540） cannot be confirmed as a pentaquark state.