2006/10/31 by Zhi-Gang Wang
Mathematics · Physics and Astronomy · #Algorithm #Diquark #High-Energy Particle Collisions Research #Mathematics #Octet #Particle physics #Particle physics theoretical and experimental studies #Physics #QCD sum rules #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #State (computer science) #Sum rule in quantum mechanics #Tetraquark #hep-ph
paper · pdf · doi:10.1016/j.nuclphysa.2007.04.012
published as Nucl.Phys.A791:106-116,2007 · 13 pages, 4 figures, 1 table
arxiv created 2007/04/05 · openalex publication_date 2007/04/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this article, we take the point of view that Y(2175) be a tetraquark state which consists of color octet constituents, and calculate its mass and decay constant within the framework of the QCD sum rule approach. We release standard criterion in the QCD sum rules approach and take more phenomenological analysis, the value of the mass of Y(2175) is consistent with experimental data; there may be some tetraquark components in the state Y(2175). If we retain standard criterion, larger mass than experimental data can be obtained, the current Jμ(x) can interpolate a tetraquark state with larger mass, or Y(2175) has some components with larger mass. The dominating contribution comes from the perturbative term, which is in contrast to the sum rules with interpolating currents constructed from diquark pairs. The tetraquark states may consist of color octet constituents rather than diquark pairs.