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This work studies the associated production of a top-quark pair with a $W$, $Z$, or Higgs boson at the LHC. Predictions for the total cross sections as well as for several differential distributions of the massive particles in the final…

High Energy Physics - Phenomenology · Physics 2019-09-04 Alessandro Broggio , Andrea Ferroglia , Rikkert Frederix , Davide Pagani , Benjamin D. Pecjak , Ioannis Tsinikos

In high energy hadronic collisions a scalar or pseudoscalar Higgs boson, Phi=H,A, can be efficiently produced via gluon fusion, which is mediated by heavy quark loops. We here consider double real emission corrections to Phi=A production,…

High Energy Physics - Phenomenology · Physics 2015-05-20 Francisco Campanario , Michael Kubocz , Dieter Zeppenfeld

We point out that heavy fermion production through the fusion of the longitudinal gauge bosons might be relevant in probing the strongly interacting symmetry breaking sector of the electroweak interactions, by showing the dependence of the…

High Energy Physics - Phenomenology · Physics 2009-10-22 Taekoon Lee

The production of multiple Higgs bosons at the LHC and beyond is a strong test of the mechanism of electroweak symmetry breaking. Taking inspiration from recent experimental efforts to move towards limits on triple Higgs production at the…

High Energy Physics - Phenomenology · Physics 2024-05-10 Anisha , Daniel Domenech , Christoph Englert , Maria J. Herrero , Roberto A. Morales

The Yukawa coupling of the Higgs boson to top quarks $\text{Y}_\text{t}$ is of particular interest as the top quark plays a special role in the electroweak symmetry breaking mechanism. Any deviation from its predicted value could hint at…

High Energy Physics - Experiment · Physics 2019-08-14 Christian Böser

We study the off-shell production of the Higgs boson at the LHC to probe Higgs physics at higher energy scales utilizing the process $g g \rightarrow h^{*} \rightarrow ZZ$. We focus on the energy scale dependence of the off-shell Higgs…

High Energy Physics - Phenomenology · Physics 2018-07-25 Dorival Goncalves , Tao Han , Satyanarayan Mukhopadhyay

We calculate fermion-loop corrections to high energy $W^+W^-$ scattering in the context of a Strongly Interacting Electroweak Symmetry Breaking Sector (EWSBS) using Higgs Effective Field Theory(HEFT). We test the assumption that these…

High Energy Physics - Phenomenology · Physics 2020-12-23 Antonio Dobado , Carlos Quezada-Calonge , Juan José Sanz-Cillero

The precise determination of the Higgs self-couplings is an essential task for understanding electroweak symmetry breaking and probing physics beyond the Standard Model (SM). The calculation of two-loop corrections to scalar couplings is…

High Energy Physics - Phenomenology · Physics 2026-04-16 Johannes Braathen , Felix Egle , Alain Verduras Schaeidt

The factorization scale dependence of the anomalous top-Higgs coupling effects in the leading order differential cross sections and distributions of the secondary lepton in the process of associated production of the top quark pair and the…

High Energy Physics - Phenomenology · Physics 2015-06-17 Karol Kolodziej

The sophistication of current predictions for $Z+$jet production at hadron colliders necessitates a re-evaluation of any approximations inherent in the theoretical calculations. In this paper we address one such issue, the inclusion of mass…

High Energy Physics - Phenomenology · Physics 2017-02-01 John M. Campbell , R. Keith Ellis

The calculation of the two-loop corrections to the electroweak gauge boson quartic couplings, growing quadratically with the Higgs boson mass, is reviewed. The potential of the CERN Large Hadron Collider and e+e- linear collider to study…

High Energy Physics - Phenomenology · Physics 2007-05-23 G. Jikia

We consider the production of pairs of Standard Model Higgs bosons via gluon fusion. Until recently the full dependence on the top quark mass $M_t$ was not known at next-to-leading order. For this reason we apply an approximation based on…

High Energy Physics - Phenomenology · Physics 2016-09-08 Jens Hoff

The Higgs trilinear coupling provides a unique opportunity to study the structure of the Higgs sector and probe indirect signs of BSM Physics -- even if new states are somehow hidden. In models with extended Higgs sectors, large deviations…

High Energy Physics - Phenomenology · Physics 2020-12-11 Johannes Braathen , Shinya Kanemura

We present a new Monte Carlo code for Higgs boson pair production at next-to-leading order in the POWHEG-BOX Monte Carlo approach. The code is based on analytic results for the two loop virtual corrections which include the full top quark…

High Energy Physics - Phenomenology · Physics 2023-09-20 Emanuele Bagnaschi , Giuseppe Degrassi , Ramona Gröber

We explore the sensitivity to new physics for the coupling of the Higgs boson ($h$) and top quark ($t$) at high energy scales with the process $pp\to t\bar{t}h$ at the high-luminosity LHC. This process probes the coupling in both the…

High Energy Physics - Phenomenology · Physics 2022-01-06 Roshan Mammen Abraham , Dorival Gonçalves , Tao Han , Sze Ching Iris Leung , Han Qin

The next generation of high energy e+ e- linear colliders is expected to operate at \sqrt{s} \gtsim 500 GeV. In this energy range the WW fusion channel dominates the Higgs boson production cross section e+ e- -> \bar\nu \nu h^0/H^0. We…

High Energy Physics - Phenomenology · Physics 2010-04-05 H. Eberl , W. Majerotto , V. C. Spanos

The coupling of a pseudo-scalar Higgs boson to gluons is mediated through a heavy quark loop. In the limit of large quark mass, it is described by an effective Lagrangian that only admits light degrees of freedom. In this effective theory,…

High Energy Physics - Phenomenology · Physics 2016-01-20 Taushif Ahmed , Thomas Gehrmann , Prakash Mathews , Narayan Rana , V. Ravindran

Understanding the Higgs potential by measuring its self-interactions is fundamental in answering several big questions, such as electroweak symmetry breaking, electroweak baryogenesis, electroweak phase transition, and electroweak vacuum…

High Energy Physics - Phenomenology · Physics 2020-11-16 Long-Bin Chen , Hai Tao Li , Hua-Sheng Shao , Jian Wang

We investigate the production of heavy, neutral Higgs boson resonances and their decays to top-quark top-antiquark ($t\bar{t}$) pairs at the Large Hadron Collider (LHC) at next-to-leading order (NLO) in the strong coupling of quantum…

High Energy Physics - Phenomenology · Physics 2016-03-02 W. Bernreuther , P. Galler , C. Mellein , Z. -G. Si , P. Uwer

We calculate the Yukawa corrections of order $O(\alpha_{ew}m_{t(b)}^{2}/m_{W}^{2})$ to charged Higgs boson production in association with a top quark at the Tevatron and the LHC. The corrections are not very sensitive to the mass of the…

High Energy Physics - Phenomenology · Physics 2019-08-17 Li Gang Jin , Chong Sheng Li , Robert J. Oakes , Shou Hua Zhu