Little Higgs model effects in $\gamma \gamma \to \gamma \gamma$
  Though the predictions of the Standard Model (SM) are in excellent agreement with experiments there are still several theoretical problems associated with the Higgs sector of the SM, where it is widely believed that some ``{\it new physics}'' will take over at the TeV scale. One beyond the SM theory which resolves these problems is the Little Higgs (LH) model. In this work we have investigated the effects of the LH model on $\gggg$ scattering \cite{Choudhury:2006xa}. 
S. Rai Choudhury, A. S. Cornell, Naveen Gaur and Ashok Goyal