Phenomenology of spin 3/2 baryons with pentaquarks

Journal Article · Tue Mar 01 04:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.054017· OSTI ID:20706107

Hyodo, Tetsuo; Hosaka, Atsushi ^[1]

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1. Research Center for Nuclear Physics (RCNP), Ibaraki, Osaka 567-0047 (Japan)

We examine several assignments of spin and parity for the pentaquark {theta}{sup +} state (J{sup P}=1/2{sup {+-}},3/2{sup {+-}}) in connection with known baryon resonances. Assuming that the {theta}{sup +} belongs to an antidecuplet representation which mixes with an octet, we calculate the mass spectra of the flavor partners of the {theta}{sup +} based on the SU(3) symmetry. The decay widths of the {theta}{sup +} and nucleon partners are analyzed for the consistency check of the mixing angle obtained from the masses. It is found that a suitable choice of the mixing angle successfully reproduces the observed masses of {theta}(1540) and {xi}{sub 3/2}(1860), when their spin and parity are assigned to be J{sup P}=3/2{sup -}, together with other J{sup P}=3/2{sup -} resonances. The decay widths of {theta}{yields}KN, N(1520){yields}{pi}N, and N(1700){yields}{pi}N are also reproduced simultaneously.

• OSTI ID: 20706107
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
FLAVOR MODEL
MASS SPECTRA
N-1520 BARYONS
N-1700 BARYONS
NUCLEONS
PARITY
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE WIDTHS
PIONS
RESONANCE PARTICLES
REST MASS
SPIN
SU-3 GROUPS
WEINBERG ANGLE