Publications
Publication Information
| Title | An a0 resonance in strongly coupled pi eta, KK-bar scattering from lattice QCD |
| Authors | Jozef Dudek, Robert Edwards, David Wilson |
| JLAB number | JLAB-THY-16-2216 |
| LANL number | arXiv:1602.05122 |
| Other number | DOE/OR/23177-3660 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Physical Review D Volume 93 Issue 09 Page(s) 094506 Refereed | |
| Publication Abstract: | We present a calculation of coupled-channel meson-meson scattering in the I = 1, G = - sector, with channels pi eta, KK-bar and pi eta', in a first-principles approach to QCD. From the discrete spectrum of eigenstates of QCD in three volumes extracted from lattice QCD correlation functions we determine the energy dependence of the S-matrix, and find that the S-wave features a prominent cusp-like behavior in pi eta --> pi eta close to KK-bar threshold coupled with a rapid turn on of amplitudes leading to the KK final-state. This behavior is traced to an a0(980)-like resonance, strongly coupled to both pi eta and KK, which is identified with a pole in the complex energy plane. Limited consideration of D-wave scattering suggests a narrow tensor resonance at higher energy. |
| Experiment Numbers: | |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | http://dx.doi.org/10.1103/PhysRevD.93.094506 |
| Accepted Manuscript: | 16-2216.pdf author's accepted manuscript |
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