Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiation from a D-dimensional collision of shock waves: a remarkably
  simple fit formula   Recently, in arXiv:1105.2298 [hep-th], we have estimated the energy radiated
in the head-on collision of two equal D-dimensional Aichelburg-Sexl shock
waves, for even D, by solving perturbatively, to first order, the Einstein
equations in the future of the collision. Here, we report on the solution for
the odd D case. After finding the wave forms, we extract the estimated radiated
energy for D=5,7,9 and 11 and unveil a remarkably simple pattern, given the
complexity of the framework: (for all D) the estimated fraction of radiated
energy matches the analytic expression 1/2-1/D, within the numerical error
(less than 0.1%). Both this fit and the apparent horizon bound converge to 1/2
as D goes to infinity.

23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin