This title appears in the Scientific Report :
2020
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevD.102.014507 in citations.
Please use the identifier: http://hdl.handle.net/2128/27000 in citations.
Elastic form factors of nucleon excitations in lattice QCD
Elastic form factors of nucleon excitations in lattice QCD
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...
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Personal Name(s): | Stokes, Finn (Corresponding author) |
---|---|
Kamleh, Waseem / Leinweber, Derek B. | |
Contributing Institute: |
Jülich Supercomputing Center; JSC |
Published in: | Physical Review D Physical review / D, 102 102 (2020 2020) 1 1, S. 014507 014507 |
Imprint: |
Melville, NY
Inst.812068
2020
2020-07-15 2020-07-01 |
DOI: |
10.1103/PhysRevD.102.014507 |
Document Type: |
Journal Article |
Research Program: |
Computational Science and Mathematical Methods |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/27000 in citations.
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. |