Understanding hadronic interactions at high energies represents a very important ingredient for modeling high energy cosmic ray air showers. In this paper, we present a new approach to simulate hadronic interactions, including hadron-hadron, hadron-nucleus, and nucleus-nucleus scattering, in the energy range roughly between 10 11 and 10 17 eV. Such collisions are very complex, being composed of...

A brief overview of direct-photon measurements in ultra-relativistic nucleus-nucleus collisions is given. The results for Pb+Pb collisions at √ sNN = 17.3 GeV and for Au+Au collisions at √ sNN = 200 GeV are compared to estimates of the direct-photon yield from hard scattering. Both results leave room for a significant thermal photon component. A description purely based on hard scattering proce...

Multi-particle production in QCD is dominated by higher twist contributions. The operator product expansion is not very effective here because the number of relevant operators grow rapidly with increasing twist. The Color Glass Condensate (CGC) provides a framework in QCD to systematically discuss “classical” (multiple scattering) and “quantum” evolution (shadowing) effects in multi-particle pr...

Recent work [1], [2], using an effective field theory framework, have shown the number of possible couplings between nucleons and dark-matter-candidate Weakly Interacting Massive Particles (WIMPs) is larger than previously thought. Inspired by existing Mathematica script that computes target response we developed a fast, modern Fortran code, including optional OpenMP parallelization, along with...