Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective-one-body Hamiltonian with next-to-leading order spin-spin
  coupling   We propose a way of including the next-to-leading (NLO) order spin-spin
coupling into an effective-one-body (EOB) Hamiltonian. This work extends [S.
Balmelli and P. Jetzer, Phys. Rev. D 87, 124036 (2013)], which is restricted to
the case of equatorial orbits and aligned spins, to general orbits with
arbitrary spin orientations. This is done applying appropriate canonical
phase-space transformations to the NLO spin-spin Hamiltonian in
Arnowitt-Deser-Misner (ADM) coordinates, and systematically adding "effectiv"
quantities at NLO to all spin-squared terms appearing in the EOB Hamiltonian.
As required by consistency, the introduced quantities reduce to zero in the
test- mass limit. We expose the result both in a general gauge and in a
gauge-fixed form. The last is chosen such as to minimize the number of new
coefficients that have to be inserted into the effective spin squared. As a
result, the 25 parameters that describe the ADM NLO spin-spin dynamics get
condensed into only 12 EOB terms.

21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess