We present an antenna shower formalism including contributions from initial-state partons and corresponding backwards evolution. We give a set of phase-space maps and antenna functions for massless partons which define a complete shower formalism suitable for computing observables with hadronic initial states. We focus on the initial-state components: initial-initial and initial-final antenna configurations. The formalism includes comprehensive possibilities for uncertainty estimates. We report on some preliminary results obtained with an implementation in the Vincia antenna-shower framework. © 2012 Elsevier B.V.
Ritzmann, M., Kosower, D. A., & Skands, P. (2013). Antenna showers with hadronic initial states. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 718(4–5), 1345–1350. https://doi.org/10.1016/j.physletb.2012.12.003