====== TTP06-11 Two-Loop Matching Coefficients for Heavy Quark Currents ======
 
 
   <hidden TTP06-11  Two-Loop Matching Coefficients for Heavy Quark Currents > In this paper we consider the matching coefficients up to two loops
 between Quantum Chromodynamics (QCD) and Non-Relativistic QCD (NRQCD)
 for the vector, axial-vector, scalar and pseudo-scalar currents.
 The structure of the effective theory is discussed and analytical
 results are presented. Particular emphasis is put on the singlet
 diagrams.
 </hidden>
|**B.A. Kniehl, A. Onishchenko, J.H. Piclum, M. Steinhauser**  | 
|**  Physics Letters  B638 209-213 2006  **  |
| {{preprints:2006:ttp06-11.pdf|PDF}} {{preprints:2006:ttp06-11.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0604072|arXiv]]   |
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