Reanalysis of the e+e- → (D(D)over-bar)±π∓ reaction and the claim for the Zc(4025) resonance

被引：17

作者：

Martinez Torres, A. ^{[1
]}

Khemchandani, K. P. ^{[1
]}

Navarra, F. S. ^{[1
]}

Nielsen, M. ^{[1
]}

Oset, E. ^{[1
,2
,3
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo, Brazil

[2] Univ Valencia, CSIC, Ctr Mixto, Inst Invest Paterna,Dept Fis Teor, Valencia 46071, Spain

[3] Univ Valencia, CSIC, Ctr Mixto, Inst Invest Paterna,IFIC, Valencia 46071, Spain

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

GAUGE BOSON; HIDDEN; STATES;

D O I：

10.1103/PhysRevD.89.014025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper we study the reaction e(+)e(-) -> (D*(D*) over bar (+/-)pi(-/+) in which the BESIII collaboration has claimed the existence of a 1(+) resonance, named Z(c)(4025), in the (D*(D*) over bar invariant mass spectrum with a mass around 4026 MeV and width close to 26 MeV. We determine the (D*(D*) over bar invariant mass distribution and find that although the explanation considered by the BESIII collaboration is plausible, there are others which are equally possible, like a 2(+) resonance or a bound state. Even more, we find that the data can be explained without the existence of a resonance/bound state. In view of the different possible interpretations found for the BESIII data, we try to devise a strategy which could help in identifying the origin of the signal reported by the BESIII collaboration. For this, we study the dependence of the (D*(D*) over bar spectrum considering the different options as a function of the total center-of-mass energy. We arrive at the conclusion that increasing the center-of-mass energy from 4.26 GeV to 4.6 GeV can be useful to distinguish between a resonance, a bound state or just a pure background as being responsible for the signal found. This information should be useful for future experiments.

引用

页数：9

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Reanalysis of the e+e- → (D*(D*)over-bar)±π∓ reaction and the claim for the Zc(4025) resonance

Reanalysis of the e+e- → (D(D)over-bar)±π∓ reaction and the claim for the Zc(4025) resonance