Papers › A Poincaré covariant cascade method for high-energy nuclear collisions
A Poincaré covariant cascade method for high-energy nuclear collisions
Yasushi Nara, Asanosuke Jinno, Tomoyuki Maruyama, Koichi Murase, Akira Ohnishi
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We present a Poincar\'e covariant cascade algorithm based on the constrained Hamiltonian dynamics in an 8N-dimensional phase space to simulate the Boltzmann-type two-body collision term. We compare this covariant cascade algorithm with traditional 6N-dimensional phase-space cascade algorithms. To validate the covariant cascade algorithm, we perform box calculations. We examine the frame dependence of the algorithm in a one-dimensionally expanding system as well as the compression stages of colliding two nuclei. We confirm that our covariant cascade method is reliable to simulate high-energy nuclear collisions. Furthermore, we present Lorentz-covariant equations of motion for the N-body system interacting via potentials, which can be efficiently solved numerically.
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