论文标题
重度重子的铬极化
Chromopolarizabilities of fully-heavy baryons
论文作者
论文摘要
我们计算了完全重的重子$ω_{qqq'} $（$ q，q，q'= b，c $）的染色体极化，这是潜在的非质量量子染色体动力学的框架。在领先的秩序下，完全沉重的哈德子被视为染色体冠状结合状态。我们发现，完全沉重的Baryon $ QQQ $的Chromopolarionalsion $β_Ω$是Quarkonium $ \ bar {q} Q $的Chromopalliadise $β_ψ$的2.6倍，带有相同的重夸克风味$ q $。此结果是准确的，以符合$ q = b $的0.3订单，并提供了$ q = c $的量单估计。我们讨论了比率$β_Ω/β_ψ$对重夸克质量$ m_q $的依赖性以及强耦合常数$α_s$以及质量$ m_ {q'}/m_q $的比率，在巴里昂（Baryon）的情况下并不是所有的Quarks都是相同的。由于沉重的载体的染色性能力定义了其相互作用的强度，该相互作用的强度是由柔软的纤维介导的低能量，长距离粘贴在一对成对的亲酸和kaons中，我们的发现反对存在由近阈值的状态组成，该状态由成对的完全重桶。
We compute the chromopolarizabilities of the fully heavy baryons $Ω_{QQQ'}$ ($Q,Q'=b,c$) in the framework of potential nonrelativistic quantum chromodynamics. At leading order, the fully heavy hadrons are considered as ground chromo-Coulombic bound states. We find that the chromopolarizability $β_Ω$ of a fully heavy baryon $QQQ$ is 2.6 times the chromopolarizability $β_ψ$ of the quarkonium $\bar{Q}Q$ with the same heavy quark flavor $Q$. This result is accurate up to the correction of the order 0.3 for $Q=b$ and provides an order-of-magnitude estimate for $Q=c$. We discuss the dependence of the ratio $β_Ω/β_ψ$ on the heavy quark mass $m_Q$ and the strong coupling constant $α_s$ as well as on the ratio of the masses $m_{Q'}/m_Q$, in the case not all quarks in the baryon are identical. Since the chromopolarizability of heavy hadrons defines the strength of their interaction at low energies mediated by soft gluons, which at long range hadronize into pairs of pions and kaons, our findings argue in favor of the existence of near-threshold states composed of pairs of fully heavy baryons.
