出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We perform the comprehensive analysis of the pentaquark (5Q) in JP = 3/2± channel using
anisotropic quenched lattice QCD. We employ the standard Wilson gauge action at b = 5.75
and the O(a) improved Wilson (clover) quark action on a 123×96 lattice with the renormalized
anisotropy as as/at = 4. A large number of gauge configurations as Nconf = 1000 is analyzed,
which is found to be essential to achieve a reliable measurement. We study three types of the
Rarita-Schwinger intepolationg fields with I = 0: (a) the NK∗-type, (b) the (color-)twisted NK∗-
type, (c) a diquark-type. As a result, we find only massive states as m5Q ≃ 2.1−2.2 GeV in
JP = 3/2− channel, and m5Q = 2.4−2.6 GeV in JP = 3/2+ channel in the chiral limit. The
analysis with the hybrid boundary condition (HBC) is performed to distinguish whether these
resonances are compact 5Q resonances or two-particle scattering states. No low-lying compact
5Q resonance states are found below 2.1GeV.
