K(-)p scattering and hyperon excitations in a chiral quark model

	K(-)p scattering and hyperon excitations in a chiral quark model
	Zhong, XH; Zhao Q(赵强); Zhao, QA
刊名	CHINESE PHYSICS C
	2010
卷号	34 期号:9 页码:1428-1432
关键词	strange resonance quark model meson-baryon interaction
通讯作者	[Zhong Xian-Hui] Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China ; [Zhao Qiang] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Zhong Xian-Hui ; Zhao Qiang] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
英文摘要	A chiral quark-model approach is employed to study the RN scattering at low energies The processes of K(-)p -> Sigma(0)pi(0), Lambda pi(0) and (K) over bar (0)n at P-K less than or similar to 800 MeV/c e the center mass energy W less than or similar to 1 7 GeV) are investigated The analysis shows that the Lambda(1405)S-01 dominates the processes K(-)p -> Sigma(0)pi(0), (K) over bar (0)n in the energy region considered here Around P-K less than or similar to 400 MeV/c, the Lambda(1520)D-03 is responsible for a strong resonant peak in the cross section of K(-)p -> Sigma(0)pi(0) and (K) over bar (0)n To reproduce the data, an unexpectedly large coupling for Lambda(1520)D-03 to KN is needed In contrast, the coupling for Lambda(1670)S-01 to KN appears to be weak, which could be due to configuration mixings between Lambda(1405)S-01, and Lambda(1670)S-01 By analyzing K(-)p -> Lambda pi(0), evidences for two low mass S-wave states, Lambda(1480)S-01 and Lambda(1560)S-01, seem to be available. With these two states, the reaction K(-)p -> (K) over bar (0)n can also be described well However, it is difficult to understand the low masses of Sigma(1480)S-11 and Sigma(1560)S-11 The s-channel amplitudes for K-p An are also larger than the naive quark model expectations The non-resonant background contributions, i e t-channel and/or u-channel, also play important roles in the explanation of the angular distributions due to amplitude interferences
学科主题	Physics
类目[WOS]	Physics, Nuclear ; Physics, Particles & Fields
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000281540100063
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/239351]
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,Zhao Q,Zhao, QA. K(-)p scattering and hyperon excitations in a chiral quark model[J]. CHINESE PHYSICS C,2010,34(9):1428-1432.
APA	Zhong, XH,赵强,&Zhao, QA.(2010).K(-)p scattering and hyperon excitations in a chiral quark model.CHINESE PHYSICS C,34(9),1428-1432.
MLA	Zhong, XH,et al."K(-)p scattering and hyperon excitations in a chiral quark model".CHINESE PHYSICS C 34.9(2010):1428-1432.