Probing the $WWγ$ vertex at hadron colliders

Details Probing the $WWγ$ vertex at hadron colliders Probing the $WWγ$ vertex at hadron colliders

1999-07-15

arxiv.org/abs/hep-ph/9907376v1

Phys.Rev.D60:113007,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, Latex, 1 figure, uses axodraw

Scientific paper

10.1103/PhysRevD.60.113007

We present a new, model independent method for extracting bounds for the anomalous $\gamma WW$ couplings from hadron collider experiments. At the partonic level we introduce a set of three observables which are constructed from the unpolarized differential cross-section for the process $d\bar{u}\to W^{-}\gamma$ by appropriate convolution with a set of simple polynomials depending only on the center-of-mass angle. One of these observables allows for the direct determination of the anomalous coupling usually denoted by $\Delta\kappa$, without any simplifying assumptions, and without relying on the presence of a radiation zero. The other two observables impose two sum rules on the remaining three anomalous couplings. The inclusion of the structure functions is discussed in detail for both $p\bar{p}$ and $pp$ colliders. We show that, whilst for $p\bar{p}$ experiments this can be accomplished straightforwardly, in the $pp$ case one has to resort to somewhat more elaborate techniques, such as the binning of events according to their longitudinal momenta.

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