Hybrid meson decay from lattice QCD

Understand

Besides the conventional hadrons containing valence quarks and valence antiquarks, quantum chromodynamics (QCD) suggests the existence of the hybrid hadrons containing valence gluons in addition to the quarks and antiquarks, and some experiments may have found some.

• A decisive experimental confirmation of its existence, however, is still needed.
• At present, lattice simulations have offered the practicable ways of theoretically guiding us to search for the hybrid states.
• In this dissertation, we study the spectroscopy and the decay rate of the heavy hybrid mesons made of a heavy $b$ quark, a heavy $\bar b$ antiquark, and a gluon ($b\bar{b}g$) to selected channels, and use lattice methods to extract the transition matrix elements in full QCD.