Baryonic branch root of N=2 M-theory fivebrane description of QCD

We investigate the brane exchange in the framework of an N=2 M-theory fivebrane description of QCD by using a specific family of M fivebrane configurations relevant to describe the baryonic branch root. An exchange of M fivebranes is realized in the Taub-NUT geometry and controlled by the moduli parameter of the configurations. This family also provides two different descriptions of the root. These descriptions are examined carefully using the Taub-NUT geometry. It is shown that they have the same baryonic branch and are shifted toward other by the brane exchange. [S0556-2821(98)04814-0].