2011

Left-Handed W Bosons at the LHC

Bern, Z., Diana, G., Dixon, L. J. et al.

Understand

The production of W bosons in association with jets is an important background to new physics at the LHC.

Events in which the W carries large transverse momentum and decays leptonically lead to large missing energy and are of particular importance.
We show that the left-handed nature of the W coupling, combined with valence quark domination at a pp machine, leads to a large left-handed polarization for both W^+ and W^- bosons at large transverse momenta.
The polarization fractions are very stable with respect to QCD corrections.

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