Improved measurement of the longitudinal spin transfer to Lambda and (Lambda)over-bar hyperons in polarized proton-proton collisions at root s=200 GeV
文献类型：期刊论文
| 作者 | Adam, J; Adamczyk, L; Adams, JR; Adkins, JK; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Alekseev, I; Anderson, DM; Aoyama, R |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2018 |
| 卷号 | 98期号:11页码:- |
| 关键词 | CHARGED CURRENT INTERACTIONS BARYON PRODUCTION PP COLLISIONS |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/PhysRevD.98.112009 |
| 文献子类 | 期刊论文 |
| 英文摘要 | The longitudinal spin transfer D-LL to Lambda and (Lambda) over bar hyperons produced in high-energy polarized proton-proton collisions is expected to be sensitive to the helicity distribution functions of strange quarks and antiquarks of the proton, and to longitudinally polarized fragmentation functions. We report an improved measurement of D-LL from data obtained at a center-of-mass energy of root s = 200 GeV with the STAR detector at RHIC. The data have an approximately twelve times larger figure of merit than prior results and cover vertical bar eta vertical bar<1.2 in pseudorapidity with transverse momenta p(T) up to 6 GeV/c. In the forward scattering hemisphere at largest p(T), the longitudinal spin transfer is found to be D-LL = - 0.036 +/- 0.048 (stat) +/- 0.013 (sys) for Lambda hyperons and D-LL = 0.032 +/- 0.043 (stat) +/- 0.013(sys) for <(Lambda)over bar> antihyperons. The dependences on eta and p(T) are presented and compared with model evaluations. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/30981]  |
| 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.Rice Univ, Houston, TX 77251 USA 2.Inst Phys, Bhubaneswar 751005, India 3.Penn State Univ, University Pk, PA 16802 USA 4.Inst High Energy Phys, Protvino 142281, Russia 5.Purdue Univ, W Lafayette, IN 47907 USA 6.Pusan Natl Univ, Pusan 46241, South Korea 7.Rutgers State Univ, Piscataway, NJ 08854 USA 8.Univ Sao Paulo, BR-05314970 Sao Paulo, Brazil 9.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 10.Shandong Univ, Qingdao 266237, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Adam, J,Adamczyk, L,Adams, JR,et al. Improved measurement of the longitudinal spin transfer to Lambda and (Lambda)over-bar hyperons in polarized proton-proton collisions at root s=200 GeV[J]. PHYSICAL REVIEW D,2018,98(11):-. |
| APA | Adam, J.,Adamczyk, L.,Adams, JR.,Adkins, JK.,Agakishiev, G.,...&Zyzak, M.(2018).Improved measurement of the longitudinal spin transfer to Lambda and (Lambda)over-bar hyperons in polarized proton-proton collisions at root s=200 GeV.PHYSICAL REVIEW D,98(11),-. |
| MLA | Adam, J,et al."Improved measurement of the longitudinal spin transfer to Lambda and (Lambda)over-bar hyperons in polarized proton-proton collisions at root s=200 GeV".PHYSICAL REVIEW D 98.11(2018):-. |
入库方式： OAI收割
来源：上海应用物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。