After a brief introduction to gluon saturation and Color Glass Condensate formalism, we use it to calculate the ultrahigh energy neutrino-nucleon cross sections and investigate the implications of gluon saturation physics for ultrahigh energy neutrinos. We show how measurement of particle production cross sections at RHIC and LHC can help reduce the uncertainties in ultrahigh energy neutrino-nucleon cross sections.

Department of Physics Washington University, Seattle, USA