arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.1616hep-thhep-phnucl-th
收藏

引力全息重子

Attractive Holographic Baryons

Anatoly Dymarsky, Dmitry Melnikov, Jacob Sonnenschein

摘要:

我们提出了一个基于嵌入在Klebanov-Strassler背景中的非超对称D 7-anti-D 7味膜的重子相互作用全息模型。重子是用M弦连接D3和味膜的D3-膜包裹锥状结构的3-球。根据后者的位置,有两种可能性:D3要么保持与味膜分离,要么溶解在味膜中,成为味瞬子。重子之间的主导相互作用是由于σ介子和Ω介子的吸引力和排斥力之间的竞争。最轻的0++粒子σ是一种伪戈德斯通玻色子,与标度不变性的自发破缺有关。在一定的参数范围内,它比任何其他质量态都轻。因此,重子在大距离上会互相吸引。在短距离上,由于Ω矢量介子的交换,势允许一个排斥核。我们讨论了重子与胶球、重介子和介子的耦合,指出了模型具有小结合能的条件。

英文摘要:

We propose a holographic model of baryon interactions based on non-supersymmetric D7-anti-D7 flavor branes embedded in the Klebanov-Strassler background. The baryons are D3-branes wrapping the 3-sphere of the conifold with M strings connecting the D3 and the flavor branes. Depending on the location of the latter there are two possibilities: the D3 either remains separate from the flavor branes or dissolves in them and becomes a flavor instanton. The leading order interaction between the baryons is a competition between the attraction and the repulsion due to the sigma and omega mesons. The lightest 0++ particle sigma is a pseudo-Goldstone boson associated with the spontaneous breaking of scale invariance. In a certain range of parameters it is parametrically lighter than any other massive state. As a result at large distances baryons attract each other. At short distances the potential admits a repulsive core due to an exchange of the omega vector meson. We discuss baryon coupling to glueballs, massive mesons and pions and point out the condition for the model to have a small binding energy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑