Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2002-03-26
JHEP 0206 (2002) 057
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
17 pages Revtex, 1 figure, references added
Scientific paper
10.1088/1126-6708/2002/06/057
Using a recent technique, proposed by Eardley and Giddings, we extend their results to the high-energy collision of two beams of massless particles, i.e. of two finite-front shock waves. Closed (marginally) trapped surfaces can be determined analytically in several cases even for collisions at non-vanishing impact parameter in D\ge 4 space-time dimensions. We are able to confirm and extend earlier conjectures by Yurtsever, and to deal with arbitrary axisymmetric profiles, including an amusing case of ``fractal'' beams. We finally discuss some implications of our results in high-energy experiments and in cosmology.
Kohlprath Emmanuel
Veneziano Gabriele
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