dc.creator | Dudek, Jozef J | |
dc.creator | Edwards, Robert G | |
dc.creator | Wilson, David John | |
dc.creator | Hadron, Spectrum Collaboration | |
dc.date.accessioned | 2016-04-14 | |
dc.date.accessioned | 2018-11-24T23:18:58Z | |
dc.date.available | 2016-06-16T11:06:44Z | |
dc.date.available | 2018-11-24T23:18:58Z | |
dc.date.issued | 2016-05-11 | |
dc.identifier | https://www.repository.cam.ac.uk/handle/1810/256341 | |
dc.identifier.uri | http://repository.aust.edu.ng/xmlui/handle/123456789/3380 | |
dc.description.abstract | We present the first calculation of coupled-channel meson-meson scattering in the isospin =1, G-parity negative sector, with channels πη, K$\bar K$ and πη′, in a first-principles approach to QCD. From the discrete spectrum of eigenstates 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 cusplike structure in πη→πη close to the K$\bar K$ threshold coupled with a rapid turn-on of amplitudes leading to the K$\bar K$ final state. This behavior is traced to an a$_{0}$(980)-like resonance, strongly coupled to both πη and K$\bar K$, which is identified with a pole in the complex energy plane, appearing on only a single unphysical Riemann sheet. Consideration of D-wave scattering suggests a narrow tensor resonance at higher energy. | |
dc.language | en | |
dc.publisher | American Physical Society | |
dc.publisher | Physical Review D | |
dc.rights | http://creativecommons.org/licenses/by-nc/4.0/ | |
dc.rights | http://creativecommons.org/licenses/by-nc/4.0/ | |
dc.rights | http://creativecommons.org/licenses/by-nc/4.0/ | |
dc.rights | Attribution-NonCommercial 4.0 International | |
dc.rights | Attribution-NonCommercial 4.0 International | |
dc.rights | Attribution-NonCommercial 4.0 International | |
dc.title | An a$_{0}$ resonance in strongly coupled πη, K$\bar K$ scattering from lattice QCD | |
dc.type | Article | |