VINCIA for hadron colliders.
We present the first public implementation of antenna-based QCD initial- and final-state showers. The shower kernels are [Formula: see text] antenna functions, which capture not only the collinear dynamics but also the leading soft (coherent) singularities of QCD matrix elements. We define the evolution measure to be inversely proportional to the leading poles, hence gluon emissions are evolved in a [Formula: see text] measure inversely proportional to the eikonal, while processes that only contain a single pole (e.g., [Formula: see text]) are evolved in virtuality. Non-ordered emissions are allowed, suppressed by an additional power of [Formula: see text]. Recoils and kinematics are governed by exact on-shell [Formula: see text] phase-space factorisations. This first implementation is limited to massless QCD partons and colourless resonances. Tree-level matrix-element corrections are included for QCD up to [Formula: see text] (4 jets), and for Drell-Yan and Higgs production up to [Formula: see text] (V/H+ 3 jets). The resulting algorithm has been made publicly available in Vincia  2.0.
School of Physics and Astronomy, Monash University, Clayton, VIC 3800 Australia.
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Fischer
SLAC National Accelerator Laboratory, Menlo Park, CA 94025 USA.
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Prestel
Nikhef, Theory Group, Science Park 105, 1098 XG Amsterdam, The Netherlands ; Institut de Physique Théorique, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France.
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Ritzmann
School of Physics and Astronomy, Monash University, Clayton, VIC 3800 Australia.
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Skands