Broken SU(3) antidecuplet for {Theta}{sup +} and {Xi}{sub 3/2}

Journal Article · Wed May 05 04:00:00 EDT 2004 · Physical Review D

OSTI ID:840031

Pakvasa, Sandip ^[1]; Suzuki, Mahiko

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1. LBNL Library

If the narrow exotic baryon resonances {Theta}{sup +}(1540) and {Xi}{sub 3/2} are members of the J{sup P} = 1/2{sup +} antidecuplet with N*(1710), the octet-antidecuplet mixing is required not only by the mass spectrum but also by the decay pattern of N*(1710). This casts doubt on validity of the {Theta}{sup +} mass prediction by the chiral soliton model. While all pieces of the existing experimental information point to a small octet-decuplet mixing, the magnitude of mixing required by the mass spectrum is not consistent with the value needed to account for the hadronic decay rates. The discrepancy is not resolved even after the large experimental uncertainty is taken into consideration. We fail to find an alternative SU(3) assignment even with different spin-parity assignment. When we extend the analysis to mixing with a higher SU(3) multiplet, we find one experimentally testable scenario in the case of mixing with a 27-plet.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Office of High Energy Physics, University of Hawaii DE-FG03-94ER40833; National Science Foundation Grant PHY-0098840 (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 840031
• Report Number(s): LBNL--54494
• Journal Information: Physical Review D, Journal Name: Physical Review D Journal Issue: 3 Vol. 70
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
DECAY
FORECASTING
SOLITONS