IS THE X(3872) A MOLECULE?

被引：3

作者：

Coito, S. ^{[1
]}

Rupp, G. ^{[1
]}

van Beveren, E. ^{[2
]}

机构：

[1] Univ Tecn Lisboa, Ctr Fis Interaccoes Fundamentais, Inst Super Tecn, P-1049001 Lisbon, Portugal

[2] Univ Coimbra, Centro Fis Computac, Dept Fis, P-3004516 Coimbra, Portugal

来源：

INTERNATIONAL MEETING EXCITED QCD | 2012年 / 5卷 / 04期

关键词：

HADRONIC DECAY;

D O I：

10.5506/APhysPolBSupp.5.1015

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Because of the controversial X(3872) meson's very close proximity to the D-0(D) over bar (*0) threshold, this charmonium-like resonance is often considered a meson-meson molecule. However, a molecular wave function must be essentially of a meson-meson type, viz. D-0(D) over bar (*0) in this case, with no other significant components. We address this issue by employing a simple two-channel Schrodinger model, in which the J(PC) = 1(++) c (c) over bar and D-0(D) over bar (*0) channels can communicate via the P-3(0) mechanism, mimicked by string breaking at a sharp distance a. Thus, wave functions and their probabilities are computed, for different bound-state pole positions approaching the D-0(D) over bar (*0) threshold from below. We conclude that at the PDG X(3872) mass and for reasonable values of a, viz. 2.0-3.0 GeV-1, the c (c) over bar component remains quite substantial and certainly not negligible, despite accounting for only about 6-10% of the total wave-function probability, owing to the naturally long tail of the D-0(D) over bar (*0) component. DOI:10.5506/APhysPolBSupp.5.1015

引用

页码：1015 / +

页数：2

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