@article{oai:aue.repo.nii.ac.jp:00004830,
 author = {Ito, Toshiaki and Matsuda, Masahisa and Matsui, Yoshimitsu},
 issue = {2},
 journal = {Progress of theoretical physics},
 month = {},
 note = {text, We discuss the problem of the large discrepancy between the observed lifetime ratio of Λ_b to B_d and the theoretical prediction obtained by the heavy quark effective theory. A new possibility of solving this problem is proposed from the viewpoint of operator product expansion and the lifetime ratio of Ω_b to B_d is predicted.},
 pages = {271--280},
 title = {New possibility of solving the problem of lifetime ratio τ(Λ_b ) / τ(B_d)},
 volume = {99},
 year = {1998}
}