Y(4260) on the lattice
Journal
Physical Review D - Particles, Fields, Gravitation and Cosmology
Journal Volume
73
Journal Issue
9
Date Issued
2006
Author(s)
Hsieh, T.-H.
Abstract
We investigate the mass spectra of closed-charm mesons with JPC=1 - , for hybrid charmonium, molecules, and diquark-antidiquark operators, in quenched lattice QCD with exact chiral symmetry. For two lattice volumes 243×48 and 203×40, each of 100 gauge configurations generated with single-plaquette action at β=6.1, we compute point-to-point quark propagators and measure the time-correlation functions of these exotic meson operators. For the molecular operator {(q̄γ5γic)(c̄γ5q)- (c̄γ5γiq)(q̄γ5c)}, it detects a resonance with mass around 4238±31MeV, which is naturally identified with Y(4260). Further, for any molecular and diquark-antidiquark operator, it detects heavier exotic charmed mesons, with (csc̄s̄) around 4450±100MeV, and (ccc̄c̄) around 6400±50MeV. © 2006 The American Physical Society.
Type
journal article