  The greybody factor from the black string in the de Rham-Gabadadze-Tolley
(dRGT) massive gravity theory is investigated in this study. The dRGT massive
gravity theory is one of the modified gravity theories used in explaining the
current acceleration in the expansion of the universe. By using cylindrical
symmetry, black strings in dRGT massive gravity are shown to exist. When
quantum effects are taken into account, black strings can emit thermal
radiation called Hawking radiation. The Hawking radiation at spatial infinity
differs from that at the source by the so-called greybody factor. In this
paper, we examined the rigorous bounds on the greybody factors from the dRGT
black strings. The results show that the greybody factor crucially depends on
the shape of the potential characterized by model parameters. The results agree
with ones in quantum mechanics, the higher the potential, the harder it is for
the waves to penetrate and also lower the bound for the rigorous bounds.
