Asymmetric 1+1-dimensional hydrodynamics in collision

Abstract

The possibility that particle production in high-energy collisions is a result of two asymmetric hydrodynamic flows is investigated, using the Khalatnikov form of the 1+1-dimensional approximation of hydrodynamic equations. The general solution is discussed and applied to the physically appealing "generalized in-out cascade" where the space-time and energy-momentum rapidities are equal at initial temperature but boost-invariance is not imposed. It is demonstrated that the two-bump structure of the entropy density, characteristic of the asymmetric input, changes easily into a single broad maximum compatible with data on particle production in symmetric processes. A possible microscopic QCD interpretation of asymmetric hydrodynamics is proposed.

10 pages, 4 (double) figures

References in corpus (9)

• Nonlinear Fluid Dynamics from Gravity
• Hydrodynamic Models for Heavy Ion Collisions
• Unified description of Bjorken and Landau 1+1 hydrodynamics
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• Entropy flow of a perfect fluid in (1+1) hydrodynamics
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• Early evolution of transversally thermalized partons
• Exact (1+1)-dimensional flows of a perfect fluid