Comment on double-logarithmic corrections to decays of electroweak bosons
High Energy Physics - Phenomenology
2009-11-02 v1
Abstract
We present a short comment on resummation of double-logarithmic (DL) contributions to decays of W and Z -bosons into charged fermion pairs. We show that resummation of DL corrections to the Z -boson decay leads to standard Sudakov form factor with the negative exponent independently of the boson is on-shell or off-shell. In contrast, the Sudakov exponent for the W - decay is negative (positive) when the W-boson is on-shell (off-shell). In this connection we consider applicability of the Dispersion Relations to the case when the imaginary parts contain infrared-divergent contributions.
Keywords
Cite
@article{arxiv.0910.5877,
title = {Comment on double-logarithmic corrections to decays of electroweak bosons},
author = {B. I. Ermolaev},
journal= {arXiv preprint arXiv:0910.5877},
year = {2009}
}
Comments
4 pages, 4 figures