arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0705.1857hep-phhep-thnucl-th
收藏

全息QCD中径向和轨道激发强子的线性平方质量轨道

Linear square-mass trajectories of radially and orbitally excited hadrons in holographic QCD

Hilmar Forkel, Michael Beyer, Tobias Frederico

摘要:

本文考虑了一种从强子的实验性质构造QCD近似全息图的新途径。这个框架使我们能够推导出一个引力对偶,它再现了经验发现的线性平方质量轨迹的径向和轨道激发强子的普遍斜率。体中的共形对称性破缺完全是由于反德西特度规的红外形变引起的,并由一个与Lambda_QCD成比例的自由质量标度控制。由此产生的背景几何表现出双重签名的限制,并提供了第一个例子全息产生的线性轨道的重子部门。对轻强子谱的预测包括了轨道斜率和基态质量之间的新关系,并且与实验总体上是一致的。

英文摘要:

We consider a new approach towards constructing approximate holographic duals of QCD from experimental hadron properties. This framework allows us to derive a gravity dual which reproduces the empirically found linear square-mass trajectories of universal slope for radially and orbitally excited hadrons. Conformal symmetry breaking in the bulk is exclusively due to infrared deformations of the anti-de Sitter metric and governed by one free mass scale proportional to Lambda_QCD. The resulting background geometry exhibits dual signatures of confinement and provides the first examples of holographically generated linear trajectories in the baryon sector. The predictions for the light hadron spectrum include new relations between trajectory slopes and ground state masses and are in good overall agreement with experiment.

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。

↑