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Title: VINCIA for hadron colliders

We present the first public implementation of antenna-based QCD initial- and final-state showers. The shower kernels are 2→3 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 p measure inversely proportional to the eikonal, while processes that only contain a single pole (e.g., g → qq¯) are evolved in virtuality. Non-ordered emissions are allowed, suppressed by an additional power of 1/Q2. Recoils and kinematics are governed by exact on-shell 2 → 3 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 O(α4s) (4 jets), and for Drell–Yan and Higgs production up to O(α3s) (V / H + 3 jets). Finally, the resulting algorithm has been made publicly available in Vincia 2.0.
Authors:
 [1] ;  [2] ;  [3] ;  [1]
  1. Monash Univ., Clayton (Australia)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Nikhef, Amsterdam (The Netherlands); Institut de Physique Theorique, Gif-sur-Yvette Cedex (France)
Publication Date:
OSTI Identifier:
1330389
Report Number(s):
SLAC-PUB-16529
Journal ID: ISSN 1434-6044; PII: 4429
Grant/Contract Number:
320651; ERC-AdG-228301; AC02-76SF00515; FT130100744
Type:
Published Article
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 76; Journal Issue: 11; Journal ID: ISSN 1434-6044
Publisher:
Springer
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS