Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heavy Quark Effective Field Theory at O(1/m_Q^2). I. QCD Corrections to
  the Lagrangian   We present a new calculation of the renormalized HQET Lagrangian at order
O(1/m_Q^2) and discuss the consequences of the BRST invariance of QCD and the
reparameterization invariance of HQET. Our result corrects earlier, conflicting
calculations and sets the stage for the calculation of the renormalized
currents at order O(1/m_Q^2).

18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int