Deep inelastic scattering from gauge string duality in the soft wall model

Details Deep inelastic scattering from gauge string duality in the soft wall model Deep inelastic scattering from gauge string duality in the soft wall model

2007-11-01

arxiv.org/abs/0711.0221v3

JHEP0803:064,2008

Physics

High Energy Physics

High Energy Physics - Theory

V3: Results unchanged. We clarified the differences between the soft and hard wall models regarding the calculation of structu

Scientific paper

10.1088/1126-6708/2008/03/064

Deep inelastic structure functions have been calculated by Polchinski and Strassler in gauge/string duality introducing a hard infrared (IR) cut off in AdS space. Here we investigate this problem using a soft IR cut off that leads to linear Regge trajectories for mesons. We calculate the structure functions for scalar particles in the large x regime where supergravity approximation holds and the small x regime where massive string states contribute. We also propose a hybrid model to calculate structure functions for fermions in the supergravity approximation. In the deep inelastic limit our results are in agreement with those obtained using a hard cut off.

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