Pentaquark {theta}{sup +}(1540) in the string model

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

DOI:https://doi.org/10.1103/PhysRevD.71.017502· OSTI ID:20705774

Martemyanov, B V; Krivoruchenko, M I ^[1]; Fuchs, C; Faessler, Amand ^[1]

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1. Institut fuer Theoretische Physik Universitaet Tuebingen, Auf der Morgenstelle 14D-72076 Tuebingen (Germany)

We consider the {theta}{sup +}(1540) pentaquark in the string model that correctly reproduces the linear Regge trajectories for the case of orbtal excitations of light qq mesons and qqq baryons. Assuming (and arguing in favor of) the diquark-antiquark-diquark ([ud]s[ud]) clustering of this orbitally excited object we found its mass about 290 MeV above the experimental value 1540 MeV. In the model considered this discrepancy could be attributed to the change of the constituent mass of s antiquark as compared to that of s quark localized at the string end.

• OSTI ID: 20705774
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
EXCITATION
MESONS
MEV RANGE
PARTICLE IDENTIFICATION
QUARKS
REGGE TRAJECTORIES
REST MASS
STRING MODELS