STI Publications - View Publication #13957
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Publication Information
| Title | The resonant pi+y --> pi+pi0 amplitude from Quantum Chromodynamics | ||||
| Abstract | We present the first \emph{ab initio} calculation of a radiative transition of a hadronic resonance within Quantum Chromodynamics (QCD). We compute the amplitude for $\pi\pi \to \pi\gamma^\star$, as a function of the energy of the $\pi\pi$ pair and the virtuality of the photon, in the kinematic regime where $\pi\pi$ couples strongly to the \emph{unstable} $\rho$ resonance. This exploratory calculation is performed using a lattice discretization of QCD with quark masses corresponding to $m_\pi \approx 400$~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 $\rho$ pole and identify from its residue the $\rho \to \pi\gamma^\star$ form-factor. | ||||
| Author(s) | Jozef Dudek, Robert Edwards, Christian Shultz, David Wilson, Raul Briceno | ||||
| Publication Date | December 2015 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | |||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review Letters |
| Refereed | Yes |
| Volume | 115 |
| Issue | 24 |
| Page(s) | 242001 |
Attachments/Datasets/DOI Link
| Document(s) |
rho_to_pi_short.pdf
(STI Document)
JLAB-PHY-15-2025.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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