[...] It suggests that another model, called the Self-Interacting Dark Matter model, can explain dark matter while the Standard Model and its Lambda Cold Dark Matter (Lambda CDM) simply can't. The paper is " An N-body/hydrodynamical simulation study of the merging cluster El Gordo: A compelling case for self-interacting dark matter? " The lead author is Riccardo Valdarnini of SISSA's (Scuola Internazionale Superiore di Studi Avanzati) Astrophysics and Cosmology group.
Read the article here.