摘要
Glouns cannot directly fragment into B c mesons until at orderα s 3 . However, the Altarelli-Parisi evolution of the b-quark fragmentation functions D b→B (Z) and D b→B (Z) from the heavy quark mass scales up to the collider energy scale Q can induce the gluon fragmentation functions D g→B (Z) and D g→B (Z), respectively, at the order α s 3 log (Q/m b,c ) through the gluon splitting g→b. We will determine these induced gluon fragmentation functions. The B c meson productions due to the induced gluon fragmentation will be evaluated and compared to the productios by the direct b-quark fragmentation. The contribution from the induced gluon fragmentation is found to be a fairly large portion of the total B c and B c * meson productions, and therefore cannot be ignored. © 1994.