IHEP OpenIR  > 实验物理中心
Production of the charmonium states chi(c1) and chi(c2) in proton nucleus interactions at root s=41.6 GeV
HERA-B Collaboration
2009
发表期刊PHYSICAL REVIEW D
卷号79期号:1页码:12001
通讯作者Abt, I (reprint author), Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany.
摘要A measurement of the ratio R-chi c = (chi(c) --> J/psi + gamma)/J/psi in pC, pTi, and pW interactions at 920 GeV/c (root s = 41.6 GeV) in the Feynman-x range -0.35 < x(F)(J/psi) < 0.15 is presented. Both mu(+)mu(-) and e(+)e(-) J/psi decay channels are observed with an overall statistics of about 15 000 chi(c) events, which is by far the largest available sample in pA collisions. The result is R chi(c) = 0.188 +/- 0.013(st-0.022sys)(+0.024) averaged ratio R-12 = R-chi c1/R-chi c2 is measured to be 1.02 +/- 0.40, leading to a cross section ratio sigma(chi(c1))/sigma(chi(c2)) = 0.57 +/- 0.23. The dependence of R-chi c on the Feynman-x of the J/psi, x(F)(J/psi), and its transverse momentum, p(T)(J/psi), is studied, as well as its dependence on the atomic number, A, of the target. For the first time, an extensive study of possible biases on R-chi c and R-12 due to the dependence of acceptance on the polarization states of J/psi and chi(c) is performed. By varying the polarization parameter, lambda(obs), of all produced J/psi's by two sigma around the value measured by HERA-B, and considering the maximum variation due to the possible chi(c1) and chi(c2) polarizations, it is shown that R-chi c could change by a factor between 1.02 and 1.21 and R-12 by a factor between 0.89 and 1.16.
文章类型Article
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.79.012001
收录类别SCI
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000262979700008
引用统计
被引频次:24[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/227878
专题实验物理中心
推荐引用方式
GB/T 7714
HERA-B Collaboration. Production of the charmonium states chi(c1) and chi(c2) in proton nucleus interactions at root s=41.6 GeV[J]. PHYSICAL REVIEW D,2009,79(1):12001.
APA HERA-B Collaboration.(2009).Production of the charmonium states chi(c1) and chi(c2) in proton nucleus interactions at root s=41.6 GeV.PHYSICAL REVIEW D,79(1),12001.
MLA HERA-B Collaboration."Production of the charmonium states chi(c1) and chi(c2) in proton nucleus interactions at root s=41.6 GeV".PHYSICAL REVIEW D 79.1(2009):12001.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
8515.pdf(686KB)期刊论文作者接受稿限制开放CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[HERA-B Collaboration]的文章
百度学术
百度学术中相似的文章
[HERA-B Collaboration]的文章
必应学术
必应学术中相似的文章
[HERA-B Collaboration]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

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。