dc.creator | Briceño, Raúl A | |
dc.creator | Dudek, Jozef J | |
dc.creator | Edwards, Robert G | |
dc.creator | Schultz, Christian J | |
dc.creator | Thomas, Christopher Edward | |
dc.creator | Wilson, David John | |
dc.date.accessioned | 2015-10-30 | |
dc.date.accessioned | 2018-11-24T23:18:27Z | |
dc.date.available | 2015-11-02T11:18:38Z | |
dc.date.available | 2018-11-24T23:18:27Z | |
dc.date.issued | 2015-12-08 | |
dc.identifier | https://www.repository.cam.ac.uk/handle/1810/252487 | |
dc.identifier.uri | http://repository.aust.edu.ng/xmlui/handle/123456789/3279 | |
dc.description.abstract | We present the first ab initio calculation of a radiative transition of a hadronic resonance within Quantum Chromodynamics (QCD). We compute the amplitude for ππ → πγ* , as a function of the energy of the ππ pair and the virtuality of the photon, in the kinematic regime where ππ couples strongly to the unstable ρ resonance. This exploratory calculation is performed using a lattice discretization of QCD with quark masses corresponding to m_π ≈ 400 MeV. We obtain a description of the energy dependence of the transition amplitude, constrained at 48 kinematic points, that we can analytically continue to the ρ pole and identify from its residue the ρ → πγ* form-factor. | |
dc.language | en | |
dc.publisher | APS | |
dc.publisher | Physical Review Letters | |
dc.title | The resonant π+γ → π+π⁰ amplitude from Quantum Chromodynamics | |
dc.type | Article | |