IHEP OpenIR  > 实验物理中心
Experimental access to Transition Distribution Amplitudes with the PANDA experiment at FAIR
PANDA Collaboration
2015
发表期刊EUROPEAN PHYSICAL JOURNAL A
卷号51期号:8页码:107
文章类型Article
摘要Baryon-to-meson Transition Distribution Amplitudes (TDAs) encoding valuable new information on hadron structure appear as building blocks in the collinear factorized description for several types of hard exclusive reactions. In this paper, we address the possibility of accessing nucleon-to-pion (pi N) TDAs from (p) over barp -> e(+)e(-)pi(0) reaction with the future PANDA detector at the FAIR facility. At high center-of-mass energy and high invariant mass squared of the lepton pair q(2), the amplitude of the signal channel (p) over barp -> e(+)e(-)pi(0) admits a QCD factorized description in terms of pi N TDAs and nucleon Distribution Amplitudes (DAs) in the forward aid backward kinematic regimes. Assuming the validity of this factorized description, we perform feasibility studies for measuring (p) over barp -> e(+)e(-)pi(0) with the PANDA detector. Detailed simulations on signal reconstruction efficiency as well as on rejection of the most severe background channel, i.e. (p) over barp -> pi(+)pi(-)pi(0) were performed for the center-of-mass energy squared s = 5 GeV2 and s = 10 GeV2, in the kinematic regions 3.0 < q(2) < 4.3 GeV2 and 5 < q(2) < 9 GeV2, respectively, with a neutral pion scattered in the forward or backward cone vertical bar cos theta(pi 0)vertical bar > 0.5 in the proton-antiproton center-of-mass frame. Results of the simulation show that the particle identification capabilities of the PANDA detector will allow to achieve a background rejection factor of 5 . 10(7) (1 . 10(7)) at low (high) q(2) for s = 5 GeV2, and of 1 . 10(8) (6 . 10(6)) at low (high) q(2) for s = 10 GeV2, while keeping the signal reconstruction efficiency at around 40%. At both energies, a clean lepton signal can be reconstructed with the expected statistics corresponding to 2 of integrated luminosity. The cross sections obtained from the simulations are used to show that a test of QCD collinear factorization can be done at the lowest order by measuring scaling laws and angular distributions. The future measurement of the signal channel cross section with PANDA will provide a new test of the perturbative QCD description of a novel class of hard exclusive reactions and will open the possibility of experimentally accessing pi N TDAs.
学科领域Physics
DOI10.1140/epja/i2015-15107-y
收录类别SCI
WOS类目Physics, Nuclear ; Physics, Particles & Fields
WOS记录号WOS:000360439700001
引用统计
被引频次:11[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/311005/228639
专题实验物理中心
推荐引用方式
GB/T 7714
PANDA Collaboration. Experimental access to Transition Distribution Amplitudes with the PANDA experiment at FAIR[J]. EUROPEAN PHYSICAL JOURNAL A,2015,51(8):107.
APA PANDA Collaboration.(2015).Experimental access to Transition Distribution Amplitudes with the PANDA experiment at FAIR.EUROPEAN PHYSICAL JOURNAL A,51(8),107.
MLA PANDA Collaboration."Experimental access to Transition Distribution Amplitudes with the PANDA experiment at FAIR".EUROPEAN PHYSICAL JOURNAL A 51.8(2015):107.
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
584.pdf(829KB)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
[PANDA Collaboration]的文章
百度学术
百度学术中相似的文章
[PANDA Collaboration]的文章
必应学术
必应学术中相似的文章
[PANDA 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。