no way to compare when less than two revisions
Differences
This shows you the differences between two versions of the page.
| |
— | preprints:2004:ttp04-01 [2016/03/17 11:03] (current) – created - external edit 127.0.0.1 |
---|
| ====== TTP04-01 Next-to-leading mass singularities in two-loop electroweak singlet form factors ====== |
| |
| |
| <hidden TTP04-01 Next-to-leading mass singularities in two-loop electroweak singlet form factors > We consider virtual electroweak corrections to the form factors for massless chiral fermions coupling to an SU(2)xU(1) singlet gauge boson in the asymptotic region $s\gg M_W^2\sim M_Z^2$, where the invariant mass $s$ of the external gauge boson is much higher than the weak-boson mass scale. Using the sector-decomposition method we compute mass singularities, which arise as logarithms of $s/M_W^2$ and $1/\epsilon$ poles in $D=4-2\epsilon$ dimensions, to one- and two-loop next-to-leading logarithmic accuracy. In this approximation we include all contributions of order $\alpha^l\epsilon^{k}\log^{j+k}(s/M_W^2)$, with $l=1,2$ and $j=2l,2l-1$. We find that the electroweak two-loop leading- and next-to-leading-logarithmic mass singularities can be written in a form that corresponds to a generalization of Catani's formula for massless QCD. |
| </hidden> |
| |**S. Pozzorini** | |
| |** Nucl.Phys. B692 135-174 2004 ** | |
| | {{preprints:2004:ttp04-01.pdf|PDF}} {{preprints:2004:ttp04-01.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0401087|arXiv]] | |
| | | |