Baryon spectroscopy TeX Export

@article{citeulike:3889471, abstract = {About 120 baryons and baryon resonances are known, from the abundant nucleon with \$u\$ and \$d\$ light-quark constituents up to the recently discovered \$\Omega\_b^-=bss\$, and the \$\Xi\_b^-=bsd\$ which contains one quark of each generation. In spite of this impressively large number of states, the underlying mechanisms leading to the excitation spectrum are not yet understood. Heavy-quark baryons suffer from a lack of known spin-parities. In the light-quark sector, quark-model calculations have met with considerable success in explaining the low-mass excitations spectrum but some important aspects like the mass degeneracy of positive-parity and negative-parity baryon excitations are not yet satisfactorily understood. At high masses, above 1.8 GeV, quark models predict a very high density of resonances per mass interval which is not observed. In this review, issues are identified discriminating between different views of the resonance spectrum; prospects are discussed how open questions in baryon spectroscopy may find answers from photo- and electro-production experiments which are presently carried out in various laboratories.}, archivePrefix = {arXiv}, author = {Klempt, Eberhard and Richard, Jean-Marc}, citeulike-article-id = {3889471}, citeulike-linkout-0 = {http://arxiv.org/abs/0901.2055}, citeulike-linkout-1 = {http://arxiv.org/pdf/0901.2055}, day = {14}, eprint = {0901.2055}, keywords = {baryons, overview}, month = {Jan}, posted-at = {2009-01-15 18:44:19}, priority = {2}, title = {Baryon spectroscopy}, url = {http://arxiv.org/abs/0901.2055}, year = {2009} }

TY - JOUR ID - citeulike:3889471 L3 - citeulike-article-id:3889471 N2 - About 120 baryons and baryon resonances are known, from the abundant nucleon with $u$ and $d$ light-quark constituents up to the recently discovered $\Omega_b^-=bss$, and the $\Xi_b^-=bsd$ which contains one quark of each generation. In spite of this impressively large number of states, the underlying mechanisms leading to the excitation spectrum are not yet understood. Heavy-quark baryons suffer from a lack of known spin-parities. In the light-quark sector, quark-model calculations have met with considerable success in explaining the low-mass excitations spectrum but some important aspects like the mass degeneracy of positive-parity and negative-parity baryon excitations are not yet satisfactorily understood. At high masses, above 1.8 GeV, quark models predict a very high density of resonances per mass interval which is not observed. In this review, issues are identified discriminating between different views of the resonance spectrum; prospects are discussed how open questions in baryon spectroscopy may find answers from photo- and electro-production experiments which are presently carried out in various laboratories. TI - Baryon spectroscopy KW - baryons KW - overview AU - Klempt, Eberhard AU - Richard, Jean-Marc PY - 2009/Jan/14/ UR - http://arxiv.org/abs/0901.2055 ER -