Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact Solutions to the Motion of Two Charged Particles in Lineal Gravity   We extend the canonical formalism for the motion of $N$-particles in lineal
gravity to include charges. Under suitable coordinate conditions and boundary
conditions the determining equation of the Hamiltonian (a kind of
transcendental equation) is derived from the matching conditions for the
dilaton field at the particles' position. The canonical equations of motion are
derived from this determining equation.
  For the equal mass case the canonical equations in terms of the proper time
can be exactly solved in terms of hyperbolic and/or trigonometric functions. In
electrodynamics with zero cosmological constant the trajectories for repulsive
charges exhibit not only bounded motion but also a countably infinite series of
unbounded motions for a fixed value of the total energy $H_{0}$, while for
attractive charges the trajectories are simply periodic. When the cosmological
constant $\Lambda$ is introduced, the motion for a given $\Lambda$ and $H_{0}$
is classified in terms of the charge-momentum diagram from which we can predict
what type of the motion is realized for a given charge.
  Since in this theory the charge of each particle appears in the form
$e_{1}e_{2}$ in the determining equation, the static balance condition in 1+1
dimensions turns out to be identical with the condition in Newtonian theory. We
generalize this condition to non-zero momenta, obtaining the first exact
solution to the static balance problem that does not obey the
Majumdar-Papapetrou condition.

23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an