Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-02-21
Phys.Rev. D73 (2006) 073001
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, 6 eps figures. Uses revtex4, amsmath, graphicx. New version includes definitions of acronyms and minor notational ch
Scientific paper
10.1103/PhysRevD.73.073001
We compare fully differential exact results for the virtual photon correction to single hard photon bremsstrahlung obtained using independent calculations, both for electron-positron annihilation at high-energy colliders and for radiative return applications. The results are compared using Monte Carlo evaluations of the matrix elements as well as by direct analytical evaluation of certain critical limits. Special attention is given to the issues of numerical stability and the treatment of finite-mass corrections. It is found that agreement on the order of 10^{-5} or better is obtained over most of the range of hard photon energies, at CMS energies relevant to both high energy collisions and radiative return experiments.
Jadach Stanislaw
Ward B. F. L.
Yost Sarah Anne
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