Regular Article - Theoretical Physics
Pseudo-observables in axial gauge
Dipartimento di Fisica Teorica, Università di Torino, and INFN, Sezione di Torino, Via P. Giuria 1, 10125, Torino, Italy
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Published online: 1 February 2008
We have given a first application of the axial gauge à la Dams and Kleiss to the standard model (SM) physics at the LHC. We have focused on the issue of providing a well-behaved signal definition in presence of potentially strong gauge cancellations at high energies. As a first illustration, we have analyzed the production of WZ vector-boson pairs, which gives rise to four final-state fermions. Purely leptonic finalstates, pp→lν̄ll′l′̄, have been numerically investigated in the region of high center-of-mass energies and large scattering angles, which are particularly sensitive to gauge dependences. We have found that the axial gauge is the appropriate framework to recover a meaningful separation of signal and irreducible background over the full energy domain.
© Springer-Verlag , 2008