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https://hdl.handle.net/2440/126930
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Type: | Journal article |
Title: | Elastic form factors of nucleon excitations in lattice QCD |
Author: | Stokes, F.M. Kamleh, W. Leinweber, D.B. |
Citation: | Physical Review D, 2020; 102(1):014507-1-014507-25 |
Publisher: | American Physical Society |
Issue Date: | 2020 |
ISSN: | 2470-0010 1550-2368 |
Statement of Responsibility: | Finn M. Stokes, Waseem Kamleh and Derek B. Leinweber |
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. |
Rights: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. |
DOI: | 10.1103/PhysRevD.102.014507 |
Grant ID: | http://purl.org/au-research/grants/arc/DP140103067 http://purl.org/au-research/grants/arc/DP150103164 http://purl.org/au-research/grants/arc/LE160100051 http://purl.org/au-research/grants/arc/LE190100021 http://purl.org/au-research/grants/arc/DP190102215 |
Published version: | http://dx.doi.org/10.1103/physrevd.102.014507 |
Appears in Collections: | Aurora harvest 8 Physics publications |
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hdl_126930.pdf | Published version | 2.3 MB | Adobe PDF | View/Open |
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