Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Operator product expansion in static-quark effective field theory: large
  perturbative correction   We calculate the coefficients of operators with dimensions d <= 7 in the
operator product expansion of correlators of q Gamma Q currents, for the
effective field theory of an infinite-mass quark, Q. Exact two-loop results are
obtained, with an arbitrary gauge group and spacetime dimension, for the
perturbative (d=0) and quark-condensate (d=3) contributions, confirming our
previous result for the anomalous dimension of the current. Leading-order
results are given for light-quark operators with d=5, 6, 7 and gluon operators
with d=4, 6. The existence of a perturbative correction of order 100% precludes
a reliable determination of f_B from non-relativistic sum rules.

37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat