  Motivated by the newly observed resonance $X(2600)$ by BESIII Collaboration,
we examine the trigluon glueball interpretation for it in the framework of QCD
sum rules. We evaluate the mass spectra of the trigluon glueballs with quantum
numbers $0^{-+}$ and $2^{-+}$ up to dimension 8 condensate in the operator
product expansion. Our numerical results indicate that the mass of the $2^{-+}$
trigluon glueball is about $2.66\pm 0.06$ GeV, which is consistent with the
mass of the X(2600) within the uncertainties, while $0^{-+}$ has a mass of
$2.01\pm0.14$ GeV. The possible decay channels of the $2^{-+}$ state are
analyzed, which are crucial in decoding $X(2600)$'s internal structure and are
hopefully measurable in BESIII, BEllEII, PANDA, and LHCb experiments.

High Energy Physics - Phenomenology