论文标题
$λ_C（2910）^+$ baryon的解释是Belle合作及其可能的底部合作伙伴
Interpretation of the $Λ_c(2910)^+$ baryon newly seen by Belle Collaboration and its possible bottom partner
论文作者
论文摘要
实验设施和分析技术的发展最近导致观察到许多腺体状态，从常规载体的激发到各种外来状态。这些州中有一个重夸克的重子提供了一个有吸引力的研究领域，以更好地了解强烈互动的非扰动性质。最近，Belle合作宣布观察国家$λ_C（2910）^+$，质量为$ 2913.8 \ pm5.6 \ pm3.8〜 \ mathrm {mev}/c^2 $和width $ 51.8 \ pm10.0 \ pm18.8〜 \ m m iv} $ {mev} $ {mev} $。 In the present study, by the mass analyses of different excitations at $Λ_c$ channel and their comparison with existing experimental information, we find that the spin-parity of this newly found excited state is $ J^P= \frac{1}{2}^-$ and it is a $ 2P $ state denoting by $Λ_c(\frac{1}{2}^-,2P)$.我们还预测了它的当前耦合，可以用作研究该粒子的不同衰减和相互作用的主要输入参数之一。我们还确定$λ_b（\ frac {1} {2}^ - ，2p）$的质量和当前耦合，可能是新的$λ_C（2910）^+$状态的底部对应物，这可能是在不久的将来的不同实验的议程中。
The developments in the experimental facilities and analyses techniques have recently lead to the observation of many hadronic states ranging from excitations of conventional hadrons to various exotic states. The baryons with single heavy quark are among these states providing an attractive field of research to get a better understanding of the nonperturbative nature of the strong interaction. Recently, the Belle Collaboration announced observation of the state $Λ_c(2910)^+$ with a mass $2913.8\pm5.6\pm3.8~\mathrm{MeV}/c^2$ and width $51.8\pm20.0\pm18.8~\mathrm{MeV}$. In the present study, by the mass analyses of different excitations at $Λ_c$ channel and their comparison with existing experimental information, we find that the spin-parity of this newly found excited state is $ J^P= \frac{1}{2}^-$ and it is a $ 2P $ state denoting by $Λ_c(\frac{1}{2}^-,2P)$. We predict its current coupling as well, which can be served as one of the main input parameters to investigate different decays and interactions of this particle. We also determine the mass and current coupling of $Λ_b(\frac{1}{2}^-,2P)$ as possible bottom counterpart of the new $Λ_c(2910)^+$ state, which may be in agenda of different experiments in near future.
