Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV
文献类型：期刊论文
| 作者 | Adamczyk, L.1; Agakishiev, G.20; Aggarwal, M. M.31; Ahammed, Z.50; Alakhverdyants, A. V.20; Alekseev, I.18; Alford, J.22; Anderson, B. D.22; Anson, C. D.29; Arkhipkin, D.3 |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2012-09-05 |
| 卷号 | 86 |
| ISSN号 | 1550-7998 |
| DOI | 10.1103/PhysRevD.86.051101 |
| 文献子类 | Article |
| 英文摘要 | Measurements of the differential cross section and the transverse single-spin asymmetry, A(N), vs x(F) for pi(0) and eta mesons are reported for 0.4 < x(F) < 0.75 at an average pseudorapidity of 3.68. A data sample of approximately 6.3 pb(-1) was analyzed, which was recorded during p(up arrow) + p collisions at root s = 200 GeV by the STAR experiment at RHIC. The average transverse beam polarization was 56%. The cross section for pi(0), including the previously unmeasured region of x(F) > 0.55, is consistent with a perturbative QCD prediction, and the eta/pi(0) cross-section ratio agrees with existing midrapidity measurements. For 0.55 < x(F) < 0.75, the average A(N) for eta is 0.210 +/- 0.056, and that for pi(0) is 0.081 +/- 0.016. The probability that these two asymmetries are equal is similar to 3%. |
| WOS关键词 | FRAGMENTATION ; POLARIZATION ; GEV/C ; BEAM |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000308344600001 |
| 出版者 | AMER PHYSICAL SOC |
| 源URL | [http://119.78.100.186/handle/113462/48875]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Adamczyk, L. |
| 作者单位 | 1.AGH Univ Sci & Technol, Krakow, Poland 2.Argonne Natl Lab, Argonne, IL 60439 USA 3.Brookhaven Natl Lab, Upton, NY 11973 USA 4.Univ Calif Berkeley, Berkeley, CA 94720 USA 5.Univ Calif Davis, Davis, CA 95616 USA 6.Univ Calif Los Angeles, Los Angeles, CA 90095 USA 7.Univ Estadual Campinas, Sao Paulo, Brazil 8.Cent China Normal Univ HZNU, Wuhan 430079, Peoples R China 9.Univ Illinois, Chicago, IL 60607 USA 10.Cracow Univ Technol, Krakow, Poland |
| 推荐引用方式 GB/T 7714 | Adamczyk, L.,Agakishiev, G.,Aggarwal, M. M.,et al. Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV[J]. PHYSICAL REVIEW D,2012,86. |
| APA | Adamczyk, L..,Agakishiev, G..,Aggarwal, M. M..,Ahammed, Z..,Alakhverdyants, A. V..,...&STAR Collaboration.(2012).Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV.PHYSICAL REVIEW D,86. |
| MLA | Adamczyk, L.,et al."Transverse single-spin asymmetry and cross section for pi(0) and eta mesons at large Feynman x in p(up arrow) + p collisions at root s=200 GeV".PHYSICAL REVIEW D 86(2012). |
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来源：近代物理研究所
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