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Lineshape of e(+)e(-) -> D*(D)over-bar + c.c. and electromagnetic form factor of D* -> D transition in the timelike region
Zhang YJ(张远江); 赵强hang, YJ; Zhao, Q
2010
发表期刊PHYSICAL REVIEW D
卷号81期号:7页码:74016
通讯作者[Zhang, Yuan-Jiang ; Zhao, Qiang] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Zhao, Qiang] Chinese Acad Sci, Sci Facil, Ctr Theoret Phys, Beijing 100049, Peoples R China
文章类型Article
摘要In this work, we apply the vector meson dominance model to extract the electromagnetic timelike form factor of the D* -> D transition combining the recent Belle data for e(+)e(-) -> D*D-+(-) + c.c. and data for D* -> D gamma. Two solutions are obtained in the interpretation of the cross section lineshape: i) With a relatively large coupling for psi D*(D) over bar determined by experiment, destructive interferences among those charmonium components are required to bring down the overall cross sections, and then account for the cross section lineshape. ii) With a relatively small value for the psi D*(D) over bar coupling based on heavy quark theory, an apparent cross section deficit near threshold is observed, and contributions from other mechanisms are needed. It might imply the presence of an additional resonance X(3900). Meanwhile, we also point out that an enhancement like that could be produced by the D-s*(D) over bar (s) + c.c. open channel effects.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.81.074016
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语种英语
WOS研究方向Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000277201900034
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被引频次:6[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/311005/240784
专题理论物理室
作者单位中国科学院高能物理研究所
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Zhang YJ,赵强hang, YJ,Zhao, Q. Lineshape of e(+)e(-) -> D*(D)over-bar + c.c. and electromagnetic form factor of D* -> D transition in the timelike region[J]. PHYSICAL REVIEW D,2010,81(7):74016.
APA 张远江,赵强hang, YJ,&Zhao, Q.(2010).Lineshape of e(+)e(-) -> D*(D)over-bar + c.c. and electromagnetic form factor of D* -> D transition in the timelike region.PHYSICAL REVIEW D,81(7),74016.
MLA 张远江,et al."Lineshape of e(+)e(-) -> D*(D)over-bar + c.c. and electromagnetic form factor of D* -> D transition in the timelike region".PHYSICAL REVIEW D 81.7(2010):74016.
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