Light vector hybrid states via QCD sum rules

Abstract

Vector hybrid states with light quarks $u,d,s$ are investigated via QCD sum rules. The results show that the masses of the $q\bar{q}g$ $(q=u,d)$, $q\bar{s}g$, and $s\bar{s}g$ states with $J^{PC}=1^{--}$ are about 2.3-2.4, 2.3-2.5, and 2.5-2.6 GeV, respectively. It suggests that the recently discovered Y(2175) could not be a pure $s\bar{s}g$ vector hybrid state.

7 pages, 1 figure