Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Moduli Dependent Non-Holomorphic Contributions of Massive States to
  Gravitational Couplings and $C^2$-Terms in $Z_N$-Orbifold Compactifications   It is pointed out that massive states in D=4, N=1 supergravity-matter
theories can, in general, at the 1-loop level contribute non-holomorphic terms
to quadratic gravitational couplings. It is then shown in the context of
$(2,2)$-symmetric $Z_N$-orbifold theories that, for constant moduli
backgrounds, the inclusion of such contributions can result in the cancellation
of naked $C^2$-terms. ${\cal R}^2$-terms can also arise but, being ghost free,
need not cancel.

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The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th