Role of the hadron molecule Λc (2940) in the p(p)over-bar → pD0(Λ)over-barc (2286) annihilation reaction

被引：30
|
作者：
Dong, Yubing [1 ,2 ]
Faessler, Amand [3 ]
Gutsche, Thomas [3 ]
Lyubovitskij, Valery E. [3 ,4 ,5 ]
机构：
[1] Inst High Energy Phys, Beijing 100049, Peoples R China
[2] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
[3] Univ Tubingen, Inst Theoret Phys, Kepler Ctr Astro & Particle Phys, D-72076 Tubingen, Germany
[4] Tomsk State Univ, Dept Phys, Tomsk 634050, Russia
[5] Tomsk Polytech Univ, Dept Math Phys, Tomsk 634050, Russia
来源：
PHYSICAL REVIEW D | 2014年 / 90卷 / 09期
关键词：
MESON-EXCHANGE MODEL; QUARK-MODEL; HEAVY BARYONS;
D O I：
10.1103/PhysRevD.90.094001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The annihilation process p (p) over bar -> pD(0)(Lambda) over bar (c)(2286) is studied taking into account t-channel D-0, D*(0) meson exchange and the resonance contribution of Lambda(c)(2286) and Lambda(c)(2940) baryons. We assume that the Lambda(c)(2940) baryon is a pD*(0) molecular state with spin-parity 1/2(+) and 1/2(-). Our results show that near the threshold of p (p) over bar -> Lambda(c)(2286)(Lambda) over bar (c)(2286) the contribution from the intermediate state Lambda(c)(2940) is also sizeable and can be observed at the (P) over bar ANDA experiment. Another conclusion is that the spin-parity assignment 1/2(-) for Lambda(c)(2940) gives enhancement for the cross section in comparison with a choice 1/2(+).
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页数：6
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