D-wave charmed and bottomed baryons from QCD sum rules
D-wave charmed and bottomed baryons from QCD sum rules
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DOI：
10.1103/physrevd.94.114016
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发表时间：
2016-12-19
影响因子：
5
通讯作者：
Zhu, Shi-Lin
中科院分区：
文献类型：
--
作者：
Chen, Hua-Xing;Mao, Qiang;Zhu, Shi-Lin
本文在重夸克有效理论框架下，利用QCD求和规则研究了Bar（F）上SUd（3）味（3）的D波粲重子。我们发现λ（c）（2880），Xi（c）（3055）和Xi（c）（3080）可以用D波SU（3）（3）在J（P）= 3/2（+）和5/2（+）的棒（F）粲重子多重态上很好地描述，它包含两个λ模轨道激发，即，λ（c）（2880）具有J（P）= 5/2（+），而Xi（c）（3055）和Xi（c）（3080）分别具有J（P）= 3/2（+）和5/2（+）。我们的结果还表明，Lambda（c）（2880）有一个伙伴状态，即J（P）= 3/2（+）的Lambda（c）（3/2（+））。它的质量约为2.810（-0.18）（+0.33）GeV，与Lambda（c）（2880）的质量差为28（-24）（+45）MeV。我们也评估他们的底层伙伴的质量。
We study the D-wave charmed baryons of SUd(3) flavor (3) over bar (F) using the method of QCD sum rules in the framework of heavy quark effective theory. We find that the Lambda(c)(2880), Xi(c)(3055), and Xi(c)(3080) can be well described by the D-wave SU(3) (3) over bar (F) charmed baryon multiplets of J(P) = 3/2(+) and 5/2(+), which contain two lambda-mode orbital excitations; i.e., the Lambda(c)(2880) has J(P) = 5/2(+), and the Xi(c)(3055) and Xi(c)(3080) have J(P) = 3/2(+) and 5/2(+), respectively. Our results also suggest that the Lambda(c)(2880) has a partner state, the Lambda(c)(3/2(+)) of J(P) = 3/2(+). Its mass is around 2.810(-0.18)(+0.33) GeV, and the mass difference between it and the Lambda(c)(2880) is 28(-24)(+45) MeV. We also evaluate the masses of their bottom partners.