Journal
PHYSICAL REVIEW D
Volume 99, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.054501
Keywords
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Funding
- DFG [CRC 110]
- Bonn-Cologne Graduate School of Physics and Astronomy
- VolkswagenStiftung [93562]
- Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) [2018DM0034]
- Shota Rustaveli National Science Foundation (SRNSF) [DI-2016-26]
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The paper presents an extension and a refinement of our previous work on the extraction of the doubly virtual forward Compton scattering amplitude on the lattice by using the background field technique [1]. The zero frequency limit for the periodic background field is discussed, in which the well-known result is reproduced. Further, an upper limit for the magnitude of the external field is established for which the perturbative treatment is still possible. Finally, the framework is set for the evaluation of the finite-volume corrections allowing for the analysis of upcoming lattice results.
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