Pentaquark hadrons from lattice QCD | Zendy

F. Csikor | Zendy; Z. Fodor | Zendy; S. D. Katz | Zendy; Tamás G. Kovács | Zendy

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Pentaquark hadrons from lattice QCD

Author(s) -

F. Csikor,

Z. Fodor,

S. D. Katz,

Tamás G. Kovács

Publication year - 2003

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2003/11/070

Subject(s) - pentaquark , isoscalar , physics , isovector , particle physics , lattice qcd , parity (physics) , hadron , quantum chromodynamics , baryon , nuclear physics , nucleon

We study spin 1/2 isoscalar and isovector candidates in both parity channelsfor the recently discovered \Theta^+(1540) pentaquark particle in quenchedlattice QCD. Our analysis takes into account all possible uncertainties, suchas statistical, finite size and quenching errors when performing the chiral andcontinuum extrapolations and we have indications that our signal is separatedfrom scattering states. The lowest mass that we find in the I^P=0^- channel isin complete agreement with the experimental value of the \Theta^+ mass. On theother hand, the lowest mass state in the opposite parity I^P=0^+ channel ismuch higher. Our findings suggests that the parity of the \Theta^+ is negative.Comment: 13 pages, 5 figures. Final version, appeared in JHE

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