Publications
Publication Information
| Title | The Positive-Parity Baryon Spectrum and the Role of Hybrid Baryons |
| Authors | Tanjib Khan, David Richards, Frank Winter |
| JLAB number | JLAB-THY-20-3253 |
| LANL number | arXiv:2010.03052 |
| Other number | DOE/OR/23177-5044 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
| Other Funding: | The College of William and Mary Extreme Science & Engg. Discovery Environment Center for Nuclear Femtography |
|
Journal Compiled for Physical Review D Volume 104 Page(s) 034503 Refereed | |
| Publication Abstract: | We calculate the low-lying spectra for the positive-parity ? and N at two pion masses of 358 and 278 MeV using an isotropic clover action with two degenerate light-quark and one strange- quark flavors through the application of the generalized variational method within the distillation framework. The spectrum exhibits the general feature observed in previous calculations using an anistropic clover lattice, with a counting of states at least as rich as the quark model. Furthermore, we identify states that are hybrid in nature, where gluonic degrees of freedom play a structural role, indicating that such states appear a feature of the excited baryon spectrum, irrespective of the lattice action, or the precise details of the smearing of the lattice interpolating operators used to identify such states. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.104.034503 |
| Accepted Manuscript: | PhysRevD.104.034503.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |