Journal Article

FZJ-2021-00716

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Elastic form factors of nucleon excitations in lattice QCD

Stokes, F. (Corresponding author)FZJ* ; Kamleh, W. ; Leinweber, D. B.

2020
Inst.812068 Melville, NY

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/27000  doi:10.1103/PhysRevD.102.014507

Abstract: First principles calculations of the form factors of baryon excitations are now becoming accessible through advances in lattice-QCD techniques. In this paper, we explore the utility of the parity-expanded variational analysis (PEVA) technique in calculating the Sachs electromagnetic form factors for excitations of the proton and neutron. We study the two lowest-lying odd-parity excitations and demonstrate that at heavier quark masses, these states are dominated by behavior consistent with constituent quark models for the N∗(1535) and N∗(1650), respectively. We also study the lowest-lying localized even-parity excitation and find that its form factors are consistent with a radial excitation of the ground-state nucleon. A comparison of the results from the PEVA technique with those from a conventional variational analysis exposes the necessity of the PEVA approach in baryon excited-state studies.

---

Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)

Appears in the scientific report 2020

---

Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

---