Exploring the D* ρ system within QCD sum rules

被引：8
作者：
Torres, A. Martinez [1 ]
Khemchandani, K. P. [1 ]
Nielsen, M. [1 ]
Navarra, F. S. [1 ]
Oset, E. [2 ,3 ]
机构：
[1] Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo, Brazil
[2] Univ Valencia, CSIC, Ctr Mixto, Inst Invest Paterna,IFIC, Valencia 46071, Spain
[3] Univ Valencia, CSIC, Ctr Mixto, Dept Fis Teor, Valencia 46071, Spain
来源：
PHYSICAL REVIEW D | 2013年 / 88卷 / 07期
基金：
巴西圣保罗研究基金会;
关键词：
CHIRAL DYNAMICS; CHARMED MESONS; ANNIHILATION; RESONANCE; SYMMETRY; STATES;
D O I：
10.1103/PhysRevD.88.074033
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a study of the D* rho system made by using the method of QCD sum rules to determine the mass of possible resonances generated in the same system. Using isospin and spin projectors, we investigate the different configurations and obtain evidences for three D* mesons with isospin I = 1/2, spin S = 0, 1, 2 and with masses 2500 +/- 67, 2523 +/- 60, and 2439 +/- 119 MeV, respectively. The last state can be associated with D-2*(2460) ( spin 2) listed by the Particle Data Group, while one of the first two might be related to D* (2640), with unknown spin parity. In the case of I = 3/2 we also find evidences of three states with spin 0, 1, and 2, respectively, with masses 2467 +/- 82, 2420 +/- 128, and 2550 +/- 56 MeV. The results for the sector I = 1/2 and S 0, 1, 2, are intriguingly similar to a previous study of the D* rho system based on effective field theories, supporting in this way a molecular picture for the resonances D* (2640) and D-2* (2460), while the results for I = 3/2 hint towards the existence of exotic mesons since a multiquark configuration is required to get the quantum numbers of the states found.
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页数：14
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