Possible precise measurements of the X(3872) mass with the e(+)e(-) -> pi(0)gamma X(3872) and p<(p)over bar> -> gamma X(3872) reactions

doi:10.1103/PhysRevD.102.114041

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	Possible precise measurements of the X(3872) mass with the e(+)e(-) -> pi(0)gamma X(3872) and p<(p)over bar> -> gamma X(3872) reactions
	Sakai, Shuntaro ; Jing, Hao-Jie ; Guo, Feng-Kun
刊名	PHYSICAL REVIEW D
	2020
卷号	102 期号:11 页码:114041
关键词	DECAYS DISTRIBUTIONS
ISSN号	2470-0010
DOI	10.1103/PhysRevD.102.114041
英文摘要	It was recently proposed that the X(3872) binding energy, the difference between the D-0(D) over bar(0) threshold and the X(3872) mass, can be precisely determined by measuring the gamma X(3872) line shape from a short-distance D(0)(D) over bar(0) source produced at high-energy experiments. Here, we investigate the feasibility of such a proposal by estimating the cross sections for the e+e- -> pi(0)gamma X(3872) and p (p) over bar -> gamma X(3872) processes considering the D(0)(D) over barD-0(0)/(D) over barD-0(0)(D) over bar (0) triangle loops. These loops can produce a triangle singularity slightly above the D(0)(D) over bar(0) threshold. It is found that the peak structures originating from the D(0)(D) over bar(0) threshold cusp and the triangle singularity are not altered much by the energy dependence introduced by the e+e- -> pi D-0(0)(D) over bar 0 and p (p) over bar -> (D) over barD-00 production parts or by considering a finite width for the X(3872). We find that sigma(e(+)e(-) -> pi(0)gamma X(3872)) x Br(X(3872) -> pi(+)pi-J/psi ) is O(0.1 fb) with the gamma X(3872) invariant mass integrated from 4.01 to 4.02 GeV and the c.m. energy of the e(+)e(-) pair fixed at 4.23 GeV. The cross section sigma(p (p) over bar -> gamma X(3872)) x Br(X(3872) -> pi(+)pi(-) J/psi) is estimated to be of O(10 pb). Our results suggest that a precise measurement of the X(3872) binding energy can be done at PANDA.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27437]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.[Sakai, Shuntaro 2.Jing, Hao-Jie 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.[Jing, Hao-Jie 5.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Sakai, Shuntaro,Jing, Hao-Jie,Guo, Feng-Kun. Possible precise measurements of the X(3872) mass with the e(+)e(-) -> pi(0)gamma X(3872) and p<(p)over bar> -> gamma X(3872) reactions[J]. PHYSICAL REVIEW D,2020,102(11):114041.
APA	Sakai, Shuntaro,Jing, Hao-Jie,&Guo, Feng-Kun.(2020).Possible precise measurements of the X(3872) mass with the e(+)e(-) -> pi(0)gamma X(3872) and p<(p)over bar> -> gamma X(3872) reactions.PHYSICAL REVIEW D,102(11),114041.
MLA	Sakai, Shuntaro,et al."Possible precise measurements of the X(3872) mass with the e(+)e(-) -> pi(0)gamma X(3872) and p<(p)over bar> -> gamma X(3872) reactions".PHYSICAL REVIEW D 102.11(2020):114041.