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arXiv · hep-ph/9805327

Final-state radiation and line-shape distortion in resonance pair production

W. Beenakker·F. A. Berends·A. P. Chapovsky
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Abstract

In this letter it is shown how final-state QED corrections to the production of a pair of resonances can distort the line shape of such a resonance in a sizeable way. This effect depends on the definition of the line shape and can reach up to 30%, depending on the final state. The mechanism is first displayed for a particular case of ZZ production, for which an exact and approximate treatment can be given. The approximate method is then applied to W-pair production. In addition some simple rules of thumb are given for accurately estimating the characteristic distortion effects, like the mass shift and peak reduction.

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W. Beenakker, F. A. Berends, A. P. Chapovsky. 1998-05-14. Final-state radiation and line-shape distortion in resonance pair production. https://doi.org/10.1016/s0370-2693(98)00760-6

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