Form factors in lattice QCD
- Publikationstyp:
- Konferenzbeitrag
- Metadaten:
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- Abstract
- Lattice simulations of QCD have produced precise estimates for the masses of the lowest-lying hadrons which show excellent agreement with experiment. By contrast, lattice results for the vector and axial vector form factors of the nucleon show significant deviations from their experimental determination. We present results from our ongoing project to compute a variety of form factors with control over all systematic uncertainties. In the case of the pion electromagnetic form factor we employ partially twisted boundary conditions to extract the pion charge radius directly from the linear slope of the form factor near vanishing momentum transfer. In the nucleon sector we focus specifically on the possible contamination from contributions of higher excited states. We argue that summed correlation functions offer the possibility of eliminating this source of systematic error. As an illustration of the method we discuss our results for the axial charge, g A , of the nucleon.
- Autoren
- Harvey Meyer
- Bastian Brandt
- Stefano Capitani
- Michele Della Morte
- Hartmut Wittig
- Dalibor Djukanovic
- J Geglia
- Georg von Hippel
- A Jüttner
- B Knippschild
- Autoren-URL
- https://researchelements.uni-mainz.de/userprofile.html?uid=173
- DOI
- 10.1140/epjst/e2011-01484-1
- Conference finish date
- 2011
- Conference place
- Mainz
- Name of conference
- Many-body structure of strongly interacting systems: Conclusive Symposium
- Datum der Veröffentlichung
- 2011
- Status
- Published
- Herausgeber
- The European Physical Journal Special Topics volume
- Herausgeber URL
- https://link.springer.com/article/10.1140/epjst/e2011-01484-1
- Datum der Datenerfassung
- 2023
- Conference start date
- 2011
- Titel
- Form factors in lattice QCD
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