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Using the production of a Higgs boson in association with a $W$ boson as a test case, we assess the impact of dimension-8 operators within the context of the Standard Model Effective Field Theory. Dimension-8--SM-interference and…

High Energy Physics - Phenomenology · Physics 2019-03-27 Chris Hays , Adam Martin , Veronica Sanz , Jack Setford

Differential cross-section measurements are presented for the electroweak production of two jets in association with a $Z$ boson. These measurements are sensitive to the vector-boson fusion production mechanism and provide a fundamental…

High Energy Physics - Experiment · Physics 2021-04-08 ATLAS Collaboration

The search for effective field theory deformations of the Standard Model (SM) is a major goal of particle physics that can benefit from a global approach in the framework of the Standard Model Effective Field Theory (SMEFT). For the first…

High Energy Physics - Phenomenology · Physics 2021-05-19 John Ellis , Maeve Madigan , Ken Mimasu , Veronica Sanz , Tevong You

Helicity selection rules can suppress the leading contributions from dimension-6 operators in the Standard Model Effective Field Theory (SMEFT), reducing sensitivity to potential new physics. This paper explores how the interference…

High Energy Physics - Phenomenology · Physics 2025-07-22 Prisco Lo Chiatto

We explore the sensitivity of Tevatron data to heavy new physics effects in differential dijet production rates using the SMEFT in light of the fact that consistent and conservative constraints from the LHC cannot cover relatively low…

High Energy Physics - Phenomenology · Physics 2019-10-02 Eduard Keilmann , William Shepherd

Interference effects are well founded from the quantum mechanical viewpoint and in principle cannot be ignored in realistic studies of New Physics scenarios. In this work, we investigate the size of interference effects between resonant and…

High Energy Physics - Phenomenology · Physics 2025-04-15 Finn Feuerstake , Elina Fuchs , Tania Robens , Daniel Winterbottom

This study explores fully leptonic WZ and WW production at the LHC within the SMEFT framework at NLO in QCD, focusing on both CP-even and CP-odd triple-gauge-coupling dimension-six operators. We investigate the off-shell processes,…

High Energy Physics - Phenomenology · Physics 2026-01-27 Hesham El Faham , Giovanni Pelliccioli , Eleni Vryonidou

We study dimension-eight effects in the Standard Model Effective Field Theory extended by right-handed neutrinos ($\nu$SMEFT). Using the Hilbert series formalism, we derive the complete basis of dimension-eight operators and confirm…

High Energy Physics - Phenomenology · Physics 2026-02-04 Manimala Mitra , Shakeel Ur Rahaman , Subham Saha , Michael Spannowsky

We study Higgs boson production via vector boson fusion at the LHC, focusing on the process $pp \to H + jj$ and capturing the leading energy-enhanced contributions within the Standard Model Effective Field Theory (SMEFT) up to order…

High Energy Physics - Phenomenology · Physics 2025-03-18 Benoît Assi , Adam Martin

We explore the constraints which can be derived on Wilson coefficients in the Standard Model Effective Field Theory from dilepton production, notably including the constraints on operators which do not lead to cross sections growing with…

High Energy Physics - Phenomenology · Physics 2021-03-31 Alyssa Horne , Jordan Pittman , Marcus Snedeker , William Shepherd , Joel W. Walker

We present a general procedure for measuring the tensor structure of the coupling of the scalar Higgs-like boson recently discovered at the LHC to two Z bosons, including the effects of interference among different operators. To motivate…

Measurements of the di- and multiboson production cross sections at the LHC constitute stringent tests of the electroweak sector of the Standard Model and provide a model-independent means to search for new physics at the TeV scale. The…

High Energy Physics - Experiment · Physics 2017-08-23 Elena Yatsenko

The sensitivity of top quark pair production at the Large Hadron Collider to the presence and nature of an underlying Z' boson is studied, accounting for six-fermion decay with full tree-level Standard Model ttbar interference and all…

High Energy Physics - Phenomenology · Physics 2017-05-15 Lucio Cerrito , Declan Millar , Stefano Moretti , Francesco Spanò

Employing the framework of the Standard Model Effective Field Theory, we perform a detailed reinterpretation of measurements of the Weinberg angle in dilepton production as a search for new-physics effects. We truncate our signal prediction…

High Energy Physics - Phenomenology · Physics 2019-09-04 Stefan Alte , Matthias König , William Shepherd

We consider the diphoton excess observed by ATLAS and CMS using the most up-to-date data and estimate the preferred enhancement in the production rate between 8 TeV and 13 TeV. Within the framework of effective field theory (EFT), we then…

High Energy Physics - Phenomenology · Physics 2016-08-03 Jernej F. Kamenik , Benjamin R. Safdi , Yotam Soreq , Jure Zupan

The Standard Model Effective Field Theory (SMEFT) provides a systematic framework to probe indirect effects of heavy new physics via precision measurements. While SMEFT constraints have been extensively studied using purely leptonic $Z$…

High Energy Physics - Phenomenology · Physics 2026-05-13 Zijian Wang , Tianyi Yang , Tianyu Mu , Andrew Levin , Qiang Li

We study the potential of fully-differential measurements of high-energy dilepton cross-sections at the LHC to probe heavy new physics encapsulated in dimension-6 interaction operators. The assessment is performed in the seven-dimensional…

High Energy Physics - Phenomenology · Physics 2021-07-28 Giuliano Panico , Lorenzo Ricci , Andrea Wulzer

Anomalous self-interactions of non-abelian gauge fields can be described by higher dimensional operators featuring gauge-invariant combinations of the field strengths. In the case of QCD, the gluon self-interactions start to be modified at…

High Energy Physics - Phenomenology · Physics 2018-09-05 V. Hirschi , F. Maltoni , I. Tsinikos , E. Vryonidou

We study the production of three electroweak gauge bosons at the LHC, in the effective field theory of the standard model, at dimension six and next-to-leading order in QCD. We present results for inclusive cross-sections and differential…

High Energy Physics - Phenomenology · Physics 2024-07-16 Eugenia Celada , Gauthier Durieux , Ken Mimasu , Eleni Vryonidou

We study single-top production in association with a $W$ boson at the Large Hadron Collider (LHC) as a probe of dimension-6 Standard Model effective field theory (SMEFT) at leading order, next-to-leading order, and approximate…

High Energy Physics - Phenomenology · Physics 2026-05-07 Nikolaos Kidonakis , Kaan Şimşek