Gluon string breaking and meson spectrum in the holographic Soft Wall model
arXiv:2112.00021 · doi:10.1016/j.physletb.2022.137185
Abstract
We propose a general method for finding a string-like meson spectrum which is based on a certain condition for the breaking of closed gluon string. A model is constructed that successfully realizes the proposed method. The model is based on the holographic Soft Wall model for QCD and the use of the Wilson confinement criterion. We applied our approach to the vector and scalar cases and obtained numerical predictions for the intercepts of corresponding Regge like radial meson spectra. A good agreement is obtained both with the existing experimental data and with some other known phenomenological approaches. Remarkably, our closed string breaking condition has two branches. We argue that they should correspond to states of opposite parity. The Wilson confinement criterion leads then to a natural mass splitting between parity partners. The constructed model represents thus the first example of bottom-up holographic model in which the effects of chiral symmetry breaking can emerge automatically, i.e., without additional assumptions taken outside of the holographic approach.
18 pages, 5 figures, v2: matches version published in PLB
References in corpus (11)
- Linear Confinement and AdS/QCD
- Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
- 1/q^2 Corrections and Gauge/String Duality
- Highly Excited Mesons, Linear Regge Trajectories and the Pattern of the Chiral Symmetry Realization
- Properties of new unflavored mesons below 2.4 GeV
- Light meson spectrum and classical symmetries of QCD
- Generalizing the Noether theorem for Hopf-algebra spacetime symmetries
- Towards understanding broad degeneracy in non-strange mesons
- Experimental indication on chiral symmetry restoration in meson spectrum
- Qualitative solution of QCD sum rules
- Towards reconciling the holographic and lattice descriptions of radially excited hadrons
Cited by in corpus (5)
- Cornell potential in generalized Soft Wall holographic model
- Confinement Potential in a Soft-Wall Holographic Model with a Hydrogen-like Spectrum
- A second Higgs near 0.5 TeV from bottom-up holographic modeling of beyond the Standard Model strong sector
- Confinement potential in Soft Wall holographic approach to QCD
- Ultraviolet regularization of energy between two static sources in the bottom-up holographic approach to strong interactions