Pentaquark hadrons from lattice QCD

Ferenc Csikor; Zoltán Fodor; Sándor D. Katz; Tamás G. Kovács

doi:10.1088/1126-6708/2003/11/070

Pentaquark hadrons from lattice QCD

Ferenc Csikor, Zoltán Fodor, Sándor D. Katz, Tamás G. Kovács

Physics

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104 Scopus citations

Abstract

We study spin 1/2 isoscalar and isovector candidates in both parity channels for the recently discovered Θ⁺ (1540) pentaquark particle in quenched lattice QCD. Our analysis takes into account all possible uncertainties, such as statistical, finite size and quenching errors when performing the chiral and continuum extrapolations and we have indications that our signal is separated from scattering states. The lowest mass that we find in the I^P = 0^- channel is in complete agreement with the experimental value of the Θ⁺ mass. On the other hand, the lowest mass state in the opposite parity I^P = 0⁺ channel is much higher. Our findings suggests that the parity of the Θ⁺ is negative.

Original language	English (US)
Pages (from-to)	1635-1647
Number of pages	13
Journal	Journal of High Energy Physics
Volume	7
Issue number	11
DOIs	https://doi.org/10.1088/1126-6708/2003/11/070
State	Published - Nov 1 2003

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1088/1126-6708/2003/11/070

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title = "Pentaquark hadrons from lattice QCD",

abstract = "We study spin 1/2 isoscalar and isovector candidates in both parity channels for the recently discovered Θ+ (1540) pentaquark particle in quenched lattice QCD. Our analysis takes into account all possible uncertainties, such as statistical, finite size and quenching errors when performing the chiral and continuum extrapolations and we have indications that our signal is separated from scattering states. The lowest mass that we find in the IP = 0- channel is in complete agreement with the experimental value of the Θ+ mass. On the other hand, the lowest mass state in the opposite parity IP = 0+ channel is much higher. Our findings suggests that the parity of the Θ+ is negative.",

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T1 - Pentaquark hadrons from lattice QCD

AU - Csikor, Ferenc

AU - Fodor, Zoltán

AU - Katz, Sándor D.

AU - Kovács, Tamás G.

PY - 2003/11/1

Y1 - 2003/11/1

N2 - We study spin 1/2 isoscalar and isovector candidates in both parity channels for the recently discovered Θ+ (1540) pentaquark particle in quenched lattice QCD. Our analysis takes into account all possible uncertainties, such as statistical, finite size and quenching errors when performing the chiral and continuum extrapolations and we have indications that our signal is separated from scattering states. The lowest mass that we find in the IP = 0- channel is in complete agreement with the experimental value of the Θ+ mass. On the other hand, the lowest mass state in the opposite parity IP = 0+ channel is much higher. Our findings suggests that the parity of the Θ+ is negative.

AB - We study spin 1/2 isoscalar and isovector candidates in both parity channels for the recently discovered Θ+ (1540) pentaquark particle in quenched lattice QCD. Our analysis takes into account all possible uncertainties, such as statistical, finite size and quenching errors when performing the chiral and continuum extrapolations and we have indications that our signal is separated from scattering states. The lowest mass that we find in the IP = 0- channel is in complete agreement with the experimental value of the Θ+ mass. On the other hand, the lowest mass state in the opposite parity IP = 0+ channel is much higher. Our findings suggests that the parity of the Θ+ is negative.

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Pentaquark hadrons from lattice QCD

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