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

作者:Bayona C A Ballon*; Boschi Filho Henrique; Braga Nelson R F
来源:The Journal of High Energy Physics, 2008, 2008(3): 064.
DOI:10.1088/1126-6708/2008/03/064

摘要

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.

  • 出版日期2008-3