Nucleon axial and pseudoscalar form factors from lattice QCD at the physical point
| Autor: | Constantia Alexandrou, P. Dimopoulos, Bartosz Kostrzewa, Giannis Koutsou, Karl Jansen, K. Hadjiyiannakou, Jacob Finkenrath, Carsten Urbach, Theodoros Leontiou, Martha Constantinou, Simone Bacchio |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Quark
Particle physics Nuclear Theory High Energy Physics::Lattice FOS: Physical sciences momentum dependence pseudoscalar [form factor] 01 natural sciences 7. Clean energy Charm quark Momentum Nuclear Theory (nucl-th) quark Pion High Energy Physics - Lattice High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences ddc:530 Nuclear Experiment (nucl-ex) 010306 general physics Nuclear Experiment lattice Physics 010308 nuclear & particles physics High Energy Physics - Lattice (hep-lat) High Energy Physics::Phenomenology pole [pi] Form factor (quantum field theory) nucleon lattice field theory axial Lattice QCD Pseudoscalar High Energy Physics - Phenomenology PCAC model statistics Lattice field theories lattice QCD Nucleon charm |
| Zdroj: | Physical review / D 103(3), 034509 (2021). doi:10.1103/PhysRevD.103.034509 Physical Review |
| ISSN: | 1824-8039 0323-0465 |
| DOI: | 10.1103/PhysRevD.103.034509 |
| Popis: | We compute the nucleon axial and induced pseudoscalar form factors using three ensembles of gauge configurations, generated with dynamical light quarks with mass tuned to approximately their physical value. One of the ensembles also includes the strange and charm quarks with their mass close to physical. The latter ensemble has large statistics and finer lattice spacing and it is used to obtain final results, while the other two are used for assessing volume effects. The pseudoscalar form factor is also computed using these ensembles. We examine the momentum dependence of these form factors as well as relations based on pion pole dominance and the partially conserved axial-vector current hypothesis. Comment: 25 pages and 27 figures |
| Databáze: | OpenAIRE |
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