Measurement of the H-3(Lambda) lifetime in Au plus Au collisions at the BNL Relativistic Heavy Ion Collider

doi:10.1103/PhysRevC.97.054909

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	Measurement of the H-3(Lambda) lifetime in Au plus Au collisions at the BNL Relativistic Heavy Ion Collider
	Adamczyk, L ; Adams, JR ; Adkins, JK ; Agakishiev, G ; Aggarwal, MM ; Ahammed, Z ; Ajitanand, NN ; Alekseev, I ; Alford, J ; Anderson, DM
刊名	PHYSICAL REVIEW C
	2018
卷号	97 期号:5 页码:-
关键词	Light Hyperfragments Neutron-stars Decay-rates Hypernuclei 3hlambda Lambdah3 Hypertriton 3/lambda-h 4hlambda Binding
ISSN号	2469-9985
DOI	10.1103/PhysRevC.97.054909
文献子类	期刊论文
英文摘要	An improved measurement of the H-3(Lambda) lifetime is presented. In this paper, the mesonic decay modes H-3(Lambda) -> He-3 + pi(-) and H-3(Lambda) -> d + p + pi(-) are used to reconstruct the H-3(Lambda) from Au+Au collision data collected by the STAR collaboration at Relativistic Heavy Ion Collider (RHIC) A minimum chi(2) estimation is used to determine the lifetime tau = 142(+21)(-24 )(stat.)+/- 29 (syst.) ps. This lifetime is about 50% shorter than the lifetime tau = 263 +/- 2 ps of a free A, indicating strong hyperon-nucleon interaction in the hypernucleus system. The branching ratios of the mesonic decay channels are also determined to satisfy B.R.(He-3+ pi(-))/(B.R.(H-3+pi(-))/B.R.((d+p+pi))) = 0.32 +/- 0.05 (stat.)+/- 0.08 (syst.). Our ratio result favors the assignment J(H-3(Lambda)) = 1/2 over J(H-3(Lambda)) = 3/2. These measurements will help to constrain models of hyperon-baryon interactions.
语种	英语
WOS记录号	WOS:000433031700005
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/29068]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Adamczyk, L 2.Adams, JR 3.Adkins, JK 4.Agakishiev, G 5.Aggarwal, MM 6.Ahammed, Z 7.Ajitanand, NN 8.Alekseev, I 9.Alford, J 10.Anderson, DM
推荐引用方式 GB/T 7714	Adamczyk, L,Adams, JR,Adkins, JK,et al. Measurement of the H-3(Lambda) lifetime in Au plus Au collisions at the BNL Relativistic Heavy Ion Collider[J]. PHYSICAL REVIEW C,2018,97(5):-.
APA	Adamczyk, L.,Adams, JR.,Adkins, JK.,Agakishiev, G.,Aggarwal, MM.,...&Zyzak, M.(2018).Measurement of the H-3(Lambda) lifetime in Au plus Au collisions at the BNL Relativistic Heavy Ion Collider.PHYSICAL REVIEW C,97(5),-.
MLA	Adamczyk, L,et al."Measurement of the H-3(Lambda) lifetime in Au plus Au collisions at the BNL Relativistic Heavy Ion Collider".PHYSICAL REVIEW C 97.5(2018):-.