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We calculate loop-induced Higgs production and decay processes which are relevant for the LHC in various six-dimensional Universal Extra Dimension models. More concretely, we focus on Higgs production through gluon fusion and Higgs decay…

High Energy Physics - Phenomenology · Physics 2015-05-20 Kenji Nishiwaki

Yukawa couplings of the first quark generation are notoriously difficult to constrain due to their small values within the Standard Model. Here we propose Higgs off-shell production, with the Higgs boson decaying to four leptons, as a probe…

High Energy Physics - Phenomenology · Physics 2023-10-06 Elisa Balzani , Ramona Gröber , Marco Vitti

We calculate the order O(alpha^2 alpha_s^3) interference effect between the gluon fusion and weak boson fusion processes allowed at the one-loop level in Higgs boson plus 2 jet production at the LHC. The corresponding one-loop amplitudes,…

High Energy Physics - Phenomenology · Physics 2008-11-26 J. R. Andersen , T. Binoth , G. Heinrich , J. M. Smillie

Discriminating the Higgs production mechanisms plays a crucial role in directly measuring the couplings of Higgs to gauge bosons for probing the nature of the electroweak symmetry breaking. We propose a novel method to distinguish the Higgs…

High Energy Physics - Phenomenology · Physics 2023-08-02 Hai Tao Li , Bin Yan , C. -P. Yuan

In high energy hadronic collisions, a general CP-violating Higgs boson $\Phi$ with accompanying jets can be efficiently produced via gluon fusion, which is mediated by heavy quark loops. In this letter we study the dominant sub-channel $ gg…

High Energy Physics - Phenomenology · Physics 2015-06-18 Francisco Campanario , Michael Kubocz

The measurement of Higgs couplings constitute an important part of present Standard Model precision tests at colliders. In this article, we show that modifications of Higgs couplings induce energy-growing effects in specific amplitudes…

High Energy Physics - Phenomenology · Physics 2019-11-06 Brian Henning , Davide Lombardo , Marc Riembau , Francesco Riva

We elucidate a new technique for estimating the production of multiple (at least two) hard jets in Higgs production via gluon-gluon fusion. The approach is based upon high energy factorisation, with the region of applicability extended by…

High Energy Physics - Phenomenology · Physics 2009-02-09 Jeppe R. Andersen , Vittorio Del Duca , Chris D. White

The first four terms of an expansion in mH^2/mt^2 of the total inclusive cross section for Higgs production in gluon fusion are evaluated through next-to-next-to-leading order QCD. A reliable and precise approximation of the full top mass…

High Energy Physics - Phenomenology · Physics 2014-11-20 Robert V. Harlander , Kemal J. Ozeren

We study the effects of the exact top-quark mass dependent two-loop corrections to Higgs boson pair production by gluon fusion at the LHC and at a 100 TeV hadron collider. We perform a detailed comparison of the full next-to-leading order…

High Energy Physics - Phenomenology · Physics 2016-11-23 S. Borowka , N. Greiner , G. Heinrich , S. P. Jones , M. Kerner , J. Schlenk , T. Zirke

We study the impact of heavy-quark masses in Higgs boson production through gluon fusion at the LHC. We extend previous computations of the fully differential cross section and of the transverse momentum spectrum of the Higgs boson by…

High Energy Physics - Phenomenology · Physics 2015-06-16 M. Grazzini , H. Sargsyan

We examine the effect of finite top- and bottom-quark masses on the Higgs production cross section in the gluon-gluon fusion channel. We employ both $\overline{\text{MS}}$ and on-shell renormalisation for the quark masses and provide a…

High Energy Physics - Phenomenology · Physics 2024-10-31 Michał Czakon , Felix Eschment , Marco Niggetiedt , Rene Poncelet , Tom Schellenberger

Pair production of W bosons constitutes an important background to Higgs boson and new physics searches at the Large Hadron Collider LHC. We have calculated the loop-induced gluon-fusion process gg -> W*W* -> leptons, including intermediate…

High Energy Physics - Phenomenology · Physics 2016-08-16 T. Binoth , M. Ciccolini , N. Kauer , M. Krämer

We revisit the hadronic production of the four-lepton final state, e^- e^+ \mu^- \mu^+, through the fusion of initial state gluons. This process is mediated by loops of quarks and we provide first full analytic results for helicity…

High Energy Physics - Phenomenology · Physics 2015-06-17 John M. Campbell , R. Keith Ellis , Ciaran Williams

Proposals of measuring the off-shell Higgs contributions and first measurements at the LHC have electrified the Higgs phenomenology community for two reasons: Firstly, probing interactions at high invariant masses and momentum transfers is…

High Energy Physics - Phenomenology · Physics 2015-05-27 Christoph Englert , Yotam Soreq , Michael Spannowsky

The production in association with a top quark is the most promising search channel for charged Higgs bosons at the LHC. We review its theoretical description including next-to-leading order corrections and the combination with a parton…

High Energy Physics - Phenomenology · Physics 2010-12-20 Tilman Plehn , Carole Weydert

Studies of on-shell and off-shell Higgs boson production in the four-lepton final state are presented, using data from the CMS experiment at the LHC that correspond to an integrated luminosity of 80.2 fb$^{-1}$ at a center-of-mass energy of…

High Energy Physics - Experiment · Physics 2019-06-26 CMS Collaboration

The resummed transverse momentum distribution of the Higgs boson in gluon fusion through LO+NLL for small transverse momenta is considered, where the Higgs is produced through a top- and bottom-quark loop. We study the mass effects with…

High Energy Physics - Phenomenology · Physics 2014-03-28 Hendrik Mantler , Marius Wiesemann

The possibility to observe a Higgs boson having a mass between 300 and 600 GeV and to measure its couplings to vector bosons and top quark with CMS at the LHC is studied. Six different signatures are analyzed. The possibility to separate…

High Energy Physics - Experiment · Physics 2009-09-25 A. -S. Nicollerat

We provide two two-loop amplitudes relevant for precision Higgs physics. The first is the two-loop amplitude for Higgs boson production through gluon fusion with exact dependence on the top quark mass up to squared order in the dimensional…

High Energy Physics - Phenomenology · Physics 2020-08-26 Charalampos Anastasiou , Nicolas Deutschmann , Armin Schweitzer

Photon-pair direct or jet-associated productions are important for relevant standard model measurement, Higgs and new physics searches at the LHC. The loop-induced gluon-fusion process gg -> \gamma\gamma g, which although formally…

High Energy Physics - Phenomenology · Physics 2015-06-03 Qiang Li , Gao Xiangdong