论文标题
新观察到的$ω_b$状态的可能解释
Possible interpretation of the newly observed $Ω_b$ states
论文作者
论文摘要
受到LHCB合作新观察到的$ω_b$状态的启发，我们研究了使用$ J $ J $ J $ COPLING SCOPEN中的Chiral Quark型号使用Chiral Quark型号的chiral Quark型号的低洼$λ$ -Mode $ -Mode $ω_b$ baryons的两种强度衰减。我们的结果表明：（i）新观察到的状态$ω_b（6316）^ - $和$ω__b（6330）^ - $是光旋转$ j = 1 $状态的良好候选者，而旋转$ j^p = 1/2^ - $ $ j^ - $ j^p = 3/2^ - $无法区分。其他两个状态，$ω_b（6340）$和$ω_b（6350）$主要对应于Light Spin $ J = 2 $状态，而Spin-Parity $ J^p = 3/2^ - $和$ J^p = 5/2^ - $也无法区分。分别是狭窄的状态，宽度为$γ<2 $ MEV。 （iii）$ 1D $状态并不广泛，总衰减宽度从几个到数十个MEV不等，在将来的实验中可以观察到良好的潜力。
Inspired by the newly observed $Ω_b$ states by the LHCb Collaboration, we investigate the two-body strong decays of the low-lying $λ$-mode $Ω_b$ baryons up to $N=2$ shell using the chiral quark model within the $j$-$j$ coupling scheme. Our results indicate that: (i) the newly observed states $Ω_b(6316)^-$ and $Ω_b(6330)^-$ are good candidates of the light spin $j=1$ states, while the spin-parity $J^P=1/2^-$ and $J^P=3/2^-$ cannot be distinguished. The other two states, $Ω_b(6340)$ and $Ω_b(6350)$ mostly correspond to the light spin $j=2$ states, while the spin-parity $J^P=3/2^-$ and $J^P=5/2^-$ cannot be distinguished as well.(ii) The $2S$ states with spin-parity $J^P=1/2^+$ and $J^P=3/2^+$, respectively, might be narrow states with a width of $Γ<2$ MeV. (iii) The $1D$ states are not broad and the total decay widths vary from several to dozens of MeV, which have a good potential to be observed in future experiments.
