Lambda Lambda interactions in finite-density QCD sum rules

	Lambda Lambda interactions in finite-density QCD sum rules
	Zhong XH(钟显辉); Zhong, XH; Ning, PZ
刊名	PHYSICAL REVIEW C
	2007
卷号	75 期号:5 页码:55206
通讯作者	Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China ; Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China
英文摘要	The properties of Lambda hyperons in pure Lambda matter are studied with the finite-density quantum chromodynamics (QCD) sum rule approach. The first-order quark and gluon condensates in Lambda nuclear matter are deduced from the chiral perturbation theory. The sum-rule predictions are sensitive to the four-quark condensates, <(q) over barq >(2)(rho) and <(q) over barq >(rho)<(s) over bars >(rho), and the pi N sigma term. When <(q) over barq >(2)(rho) is nearly independent of density and <($) over barq >(rho)<(q) over bars >(rho) depends strongly on density, we can obtain weakly attractive Lambda Lambda potentials (about several MeV) in the low Lambda density region, which agrees with the information from the latest double Lambda hypernucleus experiments. The nearly no-density dependence of <(q) over barq >(2)(rho) and strong density dependence of <(q) over barq >(rho)<(s) over bars >(rho) can be explained naturally if the properties of <(q) over barq >(2)(rho) and <(q) over barq >rho <(s) over bars >(rho) are assumed to be similar to those of pi pi and (K) over barK in nuclear medium, respectively.
学科主题	Physics
类目[WOS]	Physics, Nuclear
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000246891100071
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240692]
专题	高能物理研究所_理论物理室
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhong XH,Zhong, XH,Ning, PZ. Lambda Lambda interactions in finite-density QCD sum rules[J]. PHYSICAL REVIEW C,2007,75(5):55206.
APA	钟显辉,Zhong, XH,&Ning, PZ.(2007).Lambda Lambda interactions in finite-density QCD sum rules.PHYSICAL REVIEW C,75(5),55206.
MLA	钟显辉,et al."Lambda Lambda interactions in finite-density QCD sum rules".PHYSICAL REVIEW C 75.5(2007):55206.