论文标题
SU（5）版本的SU（5）版本的隐藏底部Pentaquark
Hidden bottom pentaquark in the SU(5) version of the flavor-spin model
论文作者
论文摘要
我们概括为五种不同的口味，它以前介绍了四种口味的风味旋转超精细相互作用，并用于研究$ uudc \ overline {c} $ pentaquark。作为一个特殊情况，我们研究了带有线性限制和目前扩展的超精细相互作用的组成夸克模型，研究正偏见或负平等的pentaquark $ uudb \ udb \ operline {b} $。正奇偶状态具有一个位于四个夸克子系统的角动量的一个单位动量，并通过轨道置换对称性$ [31] _o $的翻译不变状态来描述，该状态需要配置$ s^3 p $。负相数状态由配置$ s^4 $的置换对称性$ [4] _O $描述。我们表明，最低状态具有量子数$ j^p $ = $ 1/2^+$或$ 3/2^+$，而i = $ 1/2 $，位于-132 MeV的$σ_Bb $ threshold。我们介绍了$ uudc \ overline {c} $和$ uudb \ overline {b} $ pentaquarks的光谱之间的比较。
We generalize to five distinct flavors the flavor-spin hyperfine interaction introduced previously for four flavors and used in the study of $uudc\overline{c}$ pentaquark. As a particular case here we study the lowest states of the pentaquark $uudb\overline{b}$, of either positive or negative parity, in a constituent quark model with linear confinement and the presently extended hyperfine interaction. The positive parity states have one unit of angular momentum located in the subsystem of four quarks and are described by translationally invariant states of orbital permutation symmetry $[31]_O$ which requires the configuration $s^3 p$. The negative parity states are described by the configuration $s^4$ of permutation symmetry $[4]_O$. We show that the lowest state has the quantum numbers $J^P$ = $1/2^+$ or $3/2^+$ and I = $1/2$ and is located below the $Σ_b B$ threshold by - 132 MeV. We present a comparison between the spectra of $uudc\overline{c}$ and $uudb\overline{b}$ pentaquarks.
