N* Masses from an Anisotropic Lattice QCD Action
F.X. Lee, D.B. Leinweber, L. Zhou, J. Zanotti, S. Choe
TL;DR
This paper presents calculations of N* baryon masses in the spin 3/2 sector using an improved anisotropic lattice QCD action, analyzing parity and spin projections to compare with experimental data.
Contribution
It introduces a method for isolating N* states with different parity and examines the necessity of spin projection in lattice QCD calculations.
Findings
Mass splittings are consistent with experimental results.
Parity projection effectively isolates positive and negative parity states.
The approach improves understanding of excited baryon states in lattice QCD.
Abstract
We report N* masses in the spin 3/2 sector from a highly-improved anisotropic action. States with both positive and negative parity are isolated via a parity projection method. The extent to which spin projection is needed is examined. The gross features of the splittings from the nucleon ground state show a trend consistent with experimental results at the quark masses explored.
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