Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-07-11
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, latex, 5 figures, 1 table, a uuencoded file containing the latex file and figures is available via anonymous ftp at
Scientific paper
10.1016/0370-2693(95)00933-C
With a current-splitting technique, we calculate the gauge-invariant initial-state radiation to order \oalf\ with soft-photon exponentiation for on- and off-shell $W$-pair production. This result generalizes the convolution formula, which is known from the description of the $Z$ resonance, to the case of the production of two $W$-bosons. After up to eightfold analytical integrations, a sufficiently smooth integral over three invariant masses remains to be treated numerically. Including the Coulomb singularity, the largest corrections are covered. We discuss the corrections in a large energy range up to $\sqrt{s}$=1~TeV and draw numerical conclusions on their influence on the $W$-mass determination at LEP~200. Table~1 and figure~5 are revised after correcting the analytical formulae for the nonuniversal corrections.
Bardin Dima
Bilenky Mikhail
Olchevski A.
Riemann Tord
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