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Diquarks and Exotic Spectroscopy | | R.L. Jaffe
; F. Wilczek
; | | Date: |
28 Jul 2003 | | Journal: | Phys.Rev.Lett. 91 (2003) 232003 | | Subject: | hep-ph hep-ex nucl-ex nucl-th | | Abstract: | We propose that the recently discovered Theta baryon is a bound state of four quarks and an antiquark, containing two highly correlated ud-pairs. If so, the Theta baryon has positive parity, and it lies in an near-ideally mixed SU(3)_{f} mathbf{ar{10}}_{f} oplus mathbf{8}_{f}. The Roper resonance and the P_{11}(1710) fit naturally into this classification. We predict an isospin 3/2 multiplet of Xi’s (S=-2) with J^{Pi}=half^{+} around 1750 MeV. A search for manifestly exotic Xi^{+} and Xi^{--} in this mass range could provide a sharp test of our proposal. We predict that charm and bottom analogues of the Theta baryon are stable against strong decays. | | Source: | arXiv, hep-ph/0307341 | | Other source: | [GID 1010726] pmid14683175 | | Services: | Forum | Review | PDF | Favorites | |
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