The $pp\to W(\to l\nu)+\gamma$ process at next-to-next-to-leading order

Understand

We present details of the calculation of the $pp\to W(\to l\nu) \gamma$ process at next-to-next-to-leading order in QCD, calculated using the jettiness slicing method.

• The calculation is based entirely on analytic amplitudes.
• Because of the radiation zero, the NLO QCD contribution from the $gq$ channel is as important as the contribution from the Born $q\bar{q}$ process, disrupting the normal counting of leading and sub-leading contributions.
• We also assess the importance of electroweak (EW) corrections, including the EW corrections to both the six-parton channel $0\to \bar{u} d \nu e^+\gamma g$ and the five-parton channel $0\to \bar{u} d \nu e^+ \gamma$.