K- p -> Sigma(0)pi(0) reaction at low energies in a chiral quark model

	K- p -> Sigma(0)pi(0) reaction at low energies in a chiral quark model
	Zhong, XH; Zhao Q(赵强); Zhao, Q
刊名	PHYSICAL REVIEW C
	2009
卷号	79 期号:4 页码:45202
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 ; [Zhao, Qiang] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England ; [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 extended to the study of the (K) over bar N scattering at low energies. The process K- p -> Sigma(0)pi(0) at P-K less than or similar to 800 MeV/c (i.e., the center-of-mass energy W less than or similar to 1.7 GeV) is investigated. This approach successfully describes the differential cross sections and total cross section with the roles of the low-lying Lambda resonances in n = 1 shells clarified. The Lambda(1405)S-01 dominates the reactions over the energy region considered here. Around P-K similar or equal to 400 MeV/c, the Lambda(1520)D-03 is responsible for a strong resonant peak in the cross section. The Lambda(1670)S-01 has obvious contributions around P-K = 750 MeV/c, while the contribution of Lambda(1690)D-03 is less important in this energy region. The nonresonant background contributions, i.e., u channel and t channel, also play important roles in the explanation of the angular distributions due to amplitude interferences. The u channel turns out to have significant destructive interferences with the Lambda(1405)S-01 at the forward angles. In contrast, the t-channel K* exchange has a constructive interference at the forward angles, whereas it suppresses the cross sections slightly at the backward angles. In the t channel, the K* exchange is more dominant than the kappa exchange. Our analysis suggests that configuration mixing exists within the Lambda(1405)S-01 and Lambda(1670)S-01 and results in admixtures of the [70, (2)1, 1/2] and [70, (2)8, 1/2] configurations. The Lambda(1405)S-01 is dominated by [70, (2)1, 1/2], and Lambda(1670)S-01 by [70, (2)8, 1/2]. The mixing angle is also determined. The Lambda(1520)D-03 and Lambda(1690)D-03 are assigned as [70, (2)1, 3/2] and [70, (2)8, 3/2], 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:000266634300059
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240626]
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, Q. K- p -> Sigma(0)pi(0) reaction at low energies in a chiral quark model[J]. PHYSICAL REVIEW C,2009,79(4):45202.
APA	Zhong, XH,赵强,&Zhao, Q.(2009).K- p -> Sigma(0)pi(0) reaction at low energies in a chiral quark model.PHYSICAL REVIEW C,79(4),45202.
MLA	Zhong, XH,et al."K- p -> Sigma(0)pi(0) reaction at low energies in a chiral quark model".PHYSICAL REVIEW C 79.4(2009):45202.