Support for massless particles in Chaos Many-Body Engine simulations of nuclear collisions at relativistic energies

Following the goal of improving the relativistic nuclear collisions toy-model proposed in Grossu et al. (2014), we added support for massless particles in all "Many-Body", "High Precision", and "Reactions" modules of the Chaos Many-Body Engine application. In this context, we discuss a first CMBE-HIJING comparative study on nuclear collisions at the maximum BNL energy. As a new high precision example of use, we implemented a 50 decimals precision simulation of a bound system composed by two massless particles with gravitational potential. New version program summary Program title: Chaos Many-Body Engine v06 Catalogue identifier: AEGH_v6_0 Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AEGH_v6_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Microsoft Public License (Ms-PL) No. of lines in distributed program, including test data, etc.: 1087674 No. of bytes in distributed program, including test data, etc.: 46861801 Distribution format: tar.gz Programming language: C# 4.0 Computer: PC Operating system: Net Framework 4.0 running on MS Windows RAM: 128 MB Classification: 2460.Lz, 05.45.a Catalogue identifier of previous version: AEGH_v5_0 Journal reference of previous version: Computer Physics Communications 185 (2014) 3059 Does the new version supersede the previous version?: Yes Nature of problem: Treatment of massless particles in simulations of relativistic many-body systems. Solution method: Relativistic many-body OOP engine, including a reactions module. Reasons for new version: 1. Adding support for massless particles in CMBE simulations of relativistic many-body systems with reactions. Summary of revisions: 1. Treatment of massless particles in all CMBE modules: Many-Body Engine, High Precision Framework and Reactions Engine. 2. Simulations\Collider: Addition of some reactions with photons to the existing toy-model for chaos analysis of relativistic nuclear collisions at present BNL energies. 3. HighPrecision\Massless Particles: Implementation of a new high precision example of use (a bound system composed by 2-massless particles with gravitational potential). 4. Help\Options: CMBE options (e.g. the high precision maximum number of decimals). 5. GUI improvements (e.g. implementation of a new user control for high precision numbers I/O).