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We present new parametrisations of energy spectra of secondary particles,$\pi$-mesons, gamma-rays, electrons and neutrinos, produced in inelasticproton-proton collisions. The simple analytical approximations based onimulations of proton-proton interactions using the public available SIBYLLcode, provide very good accuracy for energy distributions of secondary productsin the energy range above 100 GeV. Generally, the recommended analyticalformulae deviate from the simulated distributions within a few percent over alarge range of $x=E_i/E_p$ - the fraction of energy of the incident protontransferred to the secondaries. Finally, we describe an approximate procedureof continuation of calculations towards low energies, down to the threshold of$\pi$-meson production.Comment: 16 pages, 14 figures, submitted to Phys ReV D (Dec 30, 2005), revised  after the referee reports (Fig 3 and Appendix added

Energy spectra of gamma rays, electrons, and neutrinos produced at proton-proton interactions in the very high energy regime