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We investigate the effects of combining next-to-leading order QCD results with parton-shower effects in $W^+W^-jj$ production via vector-boson fusion including leptonic decays. Using the Herwig 7 framework interfaced to VBFNLO 3, we compare…

High Energy Physics - Phenomenology · Physics 2016-07-04 Michael Rauch , Simon Plätzer

We present the implementation of electroweak Zjj and Wjj production via vector boson fusion with fully leptonic decays at NLO QCD in the POWHEG framework. These processes represent an important background to Higgs searches in vector boson…

High Energy Physics - Phenomenology · Physics 2013-04-12 Franziska Schissler , Dieter Zeppenfeld

Correctly identifying the nature and properties of outgoing particles from high energy collisions at the Large Hadron Collider is a crucial task for all aspects of data analysis. Classical calorimeter-based classification techniques rely on…

High Energy Physics - Experiment · Physics 2021-04-06 Luke de Oliveira , Benjamin Nachman , Michela Paganini

We present a formalism for a fully coherent QED parton shower. The complete multipole structure of photonic radiation is incorporated in a single branching kernel. The regular on-shell 2 to 3 kinematic picture is kept intact by dividing the…

High Energy Physics - Phenomenology · Physics 2018-01-17 Ronald Kleiss , Rob Verheyen

Longitudinal electroweak gauge bosons are the most technically delicate ingredient of electroweak parton showers: in the broken Standard Model, the gauge component of a longitudinal polarisation does not cancel diagram by diagram, but is…

High Energy Physics - Phenomenology · Physics 2026-03-19 M. R. Masouminia , P. Richardson

For the first time full next-to-leading-order electroweak corrections to off-shell vector-boson scattering are presented. The computation features the complete matrix elements, including all non-resonant and off-shell contributions, to the…

High Energy Physics - Phenomenology · Physics 2017-07-05 Benedikt Biedermann , Ansgar Denner , Mathieu Pellen

Soft-collinear effective theory (SCET) is applied to compute electroweak radiative corrections to Higgs production via gauge boson fusion, q q -> q q H. There are several novel features which make this process an interesting application of…

High Energy Physics - Phenomenology · Physics 2012-08-21 Andreas Fuhrer , Aneesh V. Manohar , Wouter J. Waalewijn

In high-energy leptonic collisions well above the electroweak scale, the collinear splitting mechanism of the electroweak gauge bosons becomes the dominant phenomena via the initial state radiation and the final state showering. We point…

High Energy Physics - Phenomenology · Physics 2025-01-07 Tao Han , Yang Ma , Keping Xie

We formulate the equivalence theorem as a theoretical criterion for sensitively probing the electroweak symmetry breaking mechanism, and develop a precise power counting method for the chiral Lagrangian formulated electroweak theories.…

High Energy Physics - Phenomenology · Physics 2009-10-28 H. -J. He , Y. -P. Kuang , C. -P. Yuan

We derive a new method for initial-state collinear showering in Monte-Carlo event generators which is based on the use of unintegrated parton correlation functions. Combined with a previously derived method for final-state showering, the…

High Energy Physics - Phenomenology · Physics 2008-11-26 John C. Collins , Xiaomin Zu

Single and multiple emission of electroweak gauge bosons and in particular of W bosons is discussed in the parton shower language. Algorithms and observables for the reconstruction of both leptonically and hadronically decaying W bosons…

High Energy Physics - Phenomenology · Physics 2014-06-11 Frank Krauss , Petar Petrov , Marek Schoenherr , Michael Spannowsky

The scattering of longitudinally polarized electroweak bosons is likely to play an important role in the elucidation of the fundamental nature of the Electroweak Symmetry Breaking sector and in determining the Higgs interactions with this…

High Energy Physics - Phenomenology · Physics 2013-09-13 Domenec Espriu , Federico Mescia , Brian Yencho

The emission of W and Z gauge boson is included in a traditional QCD + QED shower. The unitarity of the shower algorithm links the real radiation of the weak gauge bosons to the negative weak virtual corrections. The shower evolution…

High Energy Physics - Phenomenology · Physics 2015-06-18 Jesper Roy Christiansen , Torbjörn Sjöstrand

Three studies on six-fermion production processes are presented, in which the production of an intermediate-mass Higgs boson, the top-quark physics and the analysis of possible anomalous quartic gauge couplings are considered. A Monte Carlo…

High Energy Physics - Phenomenology · Physics 2007-05-23 F. Gangemi , G. Montagna , M. Moretti , O. Nicrosini , F. Piccinini

This paper presents the inaugural investigation of beyond the Standard Model (BSM) radiation processes, framed as a generalized, process- and model-independent parton shower algorithm within Herwig 7, based on direct translations of…

High Energy Physics - Phenomenology · Physics 2025-03-25 Joon-Bin Lee , M. R. Masouminia , Michael H. Seymour , Un-ki Yang

We specify recursive equations that could be used to generate a lowest order parton shower for hard scattering in hadron-hadron collisions. The formalism is based on the factorization soft and collinear interactions from relatively harder…

High Energy Physics - Phenomenology · Physics 2009-04-22 Zoltan Nagy , Davison E. Soper

The main attractions of studying the bosonic sector of the electroweak standard model and its extensions at a future high energy photon collider are reviewed. A presentation of the laser scheme for obtaining such a collider is given where…

High Energy Physics - Phenomenology · Physics 2008-02-03 M. Baillargeon , G. Belanger , F. Boudjema

Electroweak radiative corrections form a crucial ingredient in modern precision calculations for particle processes at high-energy colliders such as the Large Hadron Collider. The salient features of electroweak corrections as well as…

High Energy Physics - Phenomenology · Physics 2026-05-01 Stefan Dittmaier

A parton shower method for the photonic radiative correction is applied to the single W-boson production processes. The energy scale for the evolution of the parton shower is determined so that the correct soft-photon emission is…

High Energy Physics - Phenomenology · Physics 2009-01-07 Y. Kurihara , J. Fujimoto , T. Ishikawa , Y. Shimizu , K. Kato , K. Tobimatsu , T. Munehisa

The detailed study of vector-boson pair production processes at the LHC will lead to a better understanding of electroweak physics. As pointed out before, a consistent inclusion of higher-order electroweak effects in the analysis of…

High Energy Physics - Phenomenology · Physics 2014-01-17 Stefan Gieseke , Tobias Kasprzik , Johann H. Kühn