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We compute next-to-next-to-leading order QCD corrections to the gluon-induced production cross section of Higgs boson pairs in the large top quark mass limit using the soft-virtual approximation. In the limit of infinitely-heavy top quark…

High Energy Physics - Phenomenology · Physics 2015-12-09 Jonathan Grigo , Jens Hoff , Matthias Steinhauser

We present the results of a next-to-leading order calculation of QCD corrections to the production of an on-shell top-anti-top quark pair in association with two flavored b-jets. Besides studying the total cross section and its scale…

High Energy Physics - Phenomenology · Physics 2009-09-25 G. Bevilacqua , M. Czakon , C. G. Papadopoulos , R. Pittau , M. Worek

We compute two-loop corrections to the associated production of a Higgs boson with a $Z$ boson and to off-shell $Z$ boson pair production in the gluon fusion channel, mediated by a heavy quark. We perform deep expansions in the high-energy…

High Energy Physics - Phenomenology · Physics 2025-09-10 Joshua Davies , Dominik Grau , Kay Schönwald , Matthias Steinhauser , Daniel Stremmer , Marco Vitti

The complete next-to-leading order (NLO) QCD corrections to charged Higgs boson associated production with top quark through $b g \to tH^{-}$ at the CERN Large Hadron Collider are calculated in the minimal supersymmetric standard model…

High Energy Physics - Phenomenology · Physics 2009-11-07 Shou-hua Zhu

The associated production of Higgs boson with a hard photon at lepton collider, i.e., $e^+e^-\to H\gamma$, is known to bear a rather small cross section in Standard Model, and can serve as a sensitive probe for the potential new physics…

High Energy Physics - Phenomenology · Physics 2017-11-22 Wen-Long Sang , Wen Chen , Feng Feng , Yu Jia , Qing-Feng Sun

The calculation of the next-to-leading order SUSY-QCD corrections to the production of squarks, gluinos and gauginos at the Tevatron is reviewed. The NLO corrections stabilize the theoretical predictions of the various production cross…

High Energy Physics - Phenomenology · Physics 2007-05-23 W. Beenakker , M. Kraemer , T. Plehn , M. Spira

The dominant contribution to the Higgs production in association with bottom quark pair at the LHC is gluon-gluon fusion parton subprocess. We present a complete calculation of the next-to-leading order (NLO) electroweak (EW) corrections to…

High Energy Physics - Phenomenology · Physics 2018-01-03 Yu Zhang

In these proceedings, we summarise our recent calculations of next-to-leading order electroweak corrections to Higgs boson pair and Higgs boson plus jet production. The calculations are divided into different regions. In the high-energy…

High Energy Physics - Phenomenology · Physics 2023-10-24 Hantian Zhang

I present higher-order corrections from soft-gluon emission for the associated production of a top quark with a $Z$ boson via anomalous $t$-$q$-$Z$ couplings at LHC energies. Approximate next-to-next-to-leading order (aNNLO)…

High Energy Physics - Phenomenology · Physics 2018-03-07 Nikolaos Kidonakis

We present a calculation of the next-to-leading-order QCD and electroweak corrections to WWW production with leptonically decaying $\mathrm{W}$ bosons at the LHC, fully taking into account off-shell contributions, intermediary resonances,…

High Energy Physics - Phenomenology · Physics 2020-03-18 Stefan Dittmaier , Gernot Knippen , Christopher Schwan

We present theoretical results for the associated production of a single top quark and a $Z$ boson ($tqZ$ production) at LHC energies. We calculate higher-order corrections from soft-gluon emission for this process. We compute the…

High Energy Physics - Phenomenology · Physics 2023-05-19 Nikolaos Kidonakis , Nodoka Yamanaka

Radiative corrections of strong and electroweak interactions are presented at next-to-leading order for Higgs-boson production in the weak-boson-fusion channel at the LHC. The calculation includes all weak-boson fusion and quark-antiquark…

High Energy Physics - Phenomenology · Physics 2009-04-14 Mariano Ciccolini , Ansgar Denner , Stefan Dittmaier

We consider Standard Model Higgs boson production in association with a W boson in hadron collisions. We supplement the fully exclusive perturbative computation of QCD radiative effects up to next-to-next-to-leading order (NNLO) with the…

High Energy Physics - Phenomenology · Physics 2014-04-15 Giancarlo Ferrera , Massimiliano Grazzini , Francesco Tramontano

We compute the next-to-next-to-leading order QCD corrections to Higgs boson production in weak boson fusion followed by its decay to a $b\bar b$ pair or to a pair of leptonically-decaying $W$ bosons. Our calculation allows us to compute…

High Energy Physics - Phenomenology · Physics 2022-02-23 Konstantin Asteriadis , Fabrizio Caola , Kirill Melnikov , Raoul Röntsch

Radiative corrections of strong and electroweak interactions are presented at next-to-leading order for the production of a Higgs boson plus two hard jets via weak interactions at the LHC. The calculation includes all weak-boson fusion and…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Ciccolini , A. Denner , S. Dittmaier

I present a calculation of next-to-next-to-next-to-leading-order (NNNLO) soft-gluon corrections for top-antitop pair production in hadronic collisions. Approximate NNNLO (aNNNLO) results are obtained by adding the NNNLO soft-gluon…

High Energy Physics - Phenomenology · Physics 2014-07-09 Nikolaos Kidonakis

We consider QCD radiative corrections to Higgs boson pair production through gluon fusion in proton collisions. We combine the exact next-to-leading order (NLO) contribution, which features two-loop virtual amplitudes with the full…

High Energy Physics - Phenomenology · Physics 2018-06-13 Massimiliano Grazzini , Gudrun Heinrich , Stephen Jones , Stefan Kallweit , Matthias Kerner , Jonas M. Lindert , Javier Mazzitelli

We present the virtual corrections due to the top-quark loops for the process $gg \to ZZ$ at next-to-leading order in QCD. The associated two-loop box diagrams are computed using a small-transverse-momentum expansion. Our results are then…

High Energy Physics - Phenomenology · Physics 2024-04-24 Giuseppe Degrassi , Ramona Gröber , Marco Vitti

We calculate higher-order soft-gluon corrections for the associated production of a top-antitop quark pair and a $Z$ boson ($t{\bar t}Z$ production) in proton-proton collisions. We find that these corrections are numerically dominant and…

High Energy Physics - Phenomenology · Physics 2024-12-04 Nikolaos Kidonakis , Chris Foster

The production of W or Z bosons in association with two jets is an important background to the Higgs boson search in vector-boson fusion at the LHC. The purely electroweak component of this background is dominated by vector-boson fusion,…

High Energy Physics - Phenomenology · Physics 2009-11-10 Carlo Oleari , Dieter Zeppenfeld