Search for a Ridge Structure Origin with Shower Broadening and Jet   Quenching
  We investigate the role of jet and shower parton broadening by the strong colour field in the $\Delta\eta$-$\Delta\phi$ correlation of high $p_T$ particles. When anisotropic momentum broadening ($\Delta p_z > \Delta p_T$) is given to jet and shower partons in the initial stage, a ridge-like structure is found to appear in the two hadron correlation. The ratio of the peak to the pedestal yield is overestimated. 
R. Mizukawa, T. Hirano, M. Isse, Y. Nara, A. Ohnishi