Heavy Baryons: A Combined Large N_c and Heavy Quark Expansion for Electroweak Currents

Abstract

The combined large N_c and heavy quark limit for baryons containing a single heavy quark is discussed. The combined large N_c and heavy quark expansion of the heavy quark bilinear operators is obtained. In the combined expansion the corrections proportional to m_N/m_Q are summed to all orders. In particular, the combined expansion can be used to determine semileptonic form factors of heavy baryons in the combined limit.

Comments: 8 pages. Presented at The Phenomenology of Large N_c QCD, Tempe, Arizona, 9-11 Jan 2002