Abstract
We present the first results for masses of spin-[Formula Presented] N and [Formula Presented] baryons in lattice QCD using fat-link irrelevant clover fermions. Spin-[Formula Presented] interpolating fields, providing overlap with both spin-[Formula Presented] and spin-[Formula Presented] states, are considered. In the isospin-[Formula Presented] sector we observe, after appropriate spin and parity projection, a strong signal for the [Formula Presented] state together with a weak but discernible signal for the [Formula Presented] state with a mass splitting near that observed experimentally. We also find good agreement between the [Formula Presented] masses and earlier nucleon mass simulations with the standard spin-[Formula Presented] interpolating field. For the isospin-[Formula Presented] [Formula Presented] states, clear mass splittings are observed between the various [Formula Presented] and [Formula Presented] channels, with the calculated level orderings in good agreement with those observed empirically.
| Original language | English |
|---|---|
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 68 |
| Issue number | 5 |
| DOIs | |
| State | Published - 2003 |
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