Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conductivity of Coulomb interacting massless Dirac particles in
  graphene: Regularization-dependent parameters and symmetry constraints   We compute the Coulomb correction $\mathcal{C}$ to the a. c. conductivity of
interacting massless Dirac particles in graphene in the collisionless limit
using the polarization tensor approach in a regularization independent
framework. Arbitrary parameters stemming from differences between
logarithmically divergent integrals are fixed on physical grounds exploiting
only spatial $O(2)$ rotational invariance of the model which amounts to
transversality of the polarization tensor. Consequently $\mathcal{C}$ is
unequivocally determined to be $(19- 6\pi)/12$ within this effective model. We
compare our result with explicit regularizations and discuss the origin of
others results for $\mathcal{C}$ found in the literature.

27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an