Particle production in DIS off a shockwave in AdS
Abstract
Within the AdS/CFT correspondence, the shockwave metric has been widely used as a gravity dual for a fast moving nucleus. Here we propose a picture for particle production in deep inelastic scattering off a shockwave with the projectile represented by the mathcal{R} current. By using the method developed in [1] to find an explicit expression for the scattered field, we are able to show that the scattered field can be written in terms of timelike and spacelike vacuum states where the timelike states are identified with the outgoing particles. To support this picture, we calculate the contribution of the timelike modes to the energymomentum tensor of the scattered field and show that the energy flow in the fifth dimension is directly related to the imaginary part of the action. The energy flow in the fifth dimension is also compared to the incoming energy flow to determine which fraction of the initial energy goes to the produced particles. The last two sections are devoted to localize the energy flow in momentum and coordinate space, first by finding the virtualities that contribute the most to the total flow, and second by finding an approximate trajectory in coordinate space.
 Publication:

Journal of High Energy Physics
 Pub Date:
 September 2010
 DOI:
 10.1007/JHEP09(2010)007
 arXiv:
 arXiv:0912.1641
 Bibcode:
 2010JHEP...09..007D
 Keywords:

 Gaugegravity correspondence;
 Deep Inelastic Scattering;
 Nonperturbative Effects;
 High Energy Physics  Theory;
 High Energy Physics  Phenomenology
 EPrint:
 17 pages, 1 figure. Added references. To appear in JHEP