STI Publications - View Publication Form #16437
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Publication Information
| Title | On-shell representations of two-body transition amplitudes: single external current | ||||
| Abstract | Our understanding of many QCD phenomena relies on determining energy-dependent form-factors of few-body systems, from the structure of hadrons to extensions beyond the standard model. We obtain constraints on these two-body form-factors by using all-orders perturbation theory to study the analytic form of amplitudes for two-particle asymptotic states coupled via a single external current. The results presented hold for any external current, $\mathcal{J}$, with any quantum numbers. We consider asymptotic states which carry no intrinsic spin, and we make no assumptions about the underlying dynamics of their interactions. We verify the previously known form for the analytic structure of $1+\mathcal{J}\to2$ reactions with any number of intermediate two-particle states. Furthermore, we present previously unknown expressions of $2+\mathcal{J}\to2$ amplitudes, which can in turn be computed via lattice QCD. We identify the exact form of all singularities of these amplitudes near the real-energ | ||||
| Author(s) | Raul Briceno, Andrew Jackura, Felipe Ortega Gama, Keegan Sherman | ||||
| Publication Date | June 2021 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| 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 D |
| Refereed | Yes |
| Volume | 103 |
| Issue | |
| Page(s) | 114512 |
Attachments/Datasets/DOI Link
| Document(s) |
On_Shell_Representations_of_Two_Body_Amplitudes_with_One_or_Two_External_Currents.pdf
(STI Document)
PhysRevD.103.114512.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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