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We perform a detailed comparison of next-to-next-to-leading order (NNLO) QCD predictions for the W+jet and Z+jet processes with 7 TeV experimental data from ATLAS and CMS. We observe excellent agreement between theory and data for most…

High Energy Physics - Phenomenology · Physics 2016-06-27 Radja Boughezal , Xiaohui Liu , Frank Petriello

We calculate the fully differential next-to-next-to-leading-order (NNLO) corrections to vector-boson fusion (VBF) Higgs production at proton colliders, in the limit in which there is no cross-talk between the hadronic systems associated…

High Energy Physics - Phenomenology · Physics 2018-02-22 Matteo Cacciari , Frédéric A. Dreyer , Alexander Karlberg , Gavin P. Salam , Giulia Zanderighi

We compare fixed order and parton shower matched predictions for the process ${pp\rightarrow \ell^+\nu_{\ell} \ell^-\bar{\nu}_{\ell} \ell^{\pm}{\nu}_{\ell} b\bar{b}+X}$ at NLO in QCD, including the orders $\mathcal{O}(\alpha_s^3\alpha^6)$…

High Energy Physics - Phenomenology · Physics 2022-12-06 Jasmina Nasufi

For precision studies with QCD observables at colliders, higher order perturbative corrections are often mandatory. For exclusive observables, like jet cross sections or differential distributions, these corrections were until recently only…

High Energy Physics - Phenomenology · Physics 2008-12-30 T. Gehrmann

The decade-old technique of combining NLO-corrected hard process with LO-level parton shower Monte Carlo is now mature and used in practice of the QCD calculations in the LHC data analysis. The next step, its extension to an NNLO-corrected…

High Energy Physics - Phenomenology · Physics 2015-06-17 S. Jadach , A. Kusina , W. Placzek , M. Skrzypek

We present a fully automated framework based on the FeynRules and MadGraph5 aMC@NLO programs that allows for accurate simulations of supersymmetric QCD processes at the LHC. Starting directly from a model Lagrangian that features squark and…

High Energy Physics - Phenomenology · Physics 2016-02-23 Celine Degrande , Benjamin Fuks , Valentin Hirschi , Josselin Proudom , Hua-Sheng Shao

We describe how the nested soft-collinear subtraction scheme [1] can be used to compute the next-to-next-to-leading order (NNLO) QCD corrections to the production of an arbitrary number of gluonic jets in hadron collisions. We show that the…

High Energy Physics - Phenomenology · Physics 2025-03-20 Federica Devoto , Kirill Melnikov , Raoul Röntsch , Chiara Signorile-Signorile , Davide Maria Tagliabue

We present a computation of the inclusive Drell-Yan production cross-section in perturbative QCD to all orders in the limit of high partonic centre-of-mass energy. We compare our results to the fixed order NLO and NNLO results in MSbar…

High Energy Physics - Phenomenology · Physics 2009-06-05 Simone Marzani , Richard D. Ball

We present a calculation of the next-to-leading order (NLO) QCD corrections to the hadroproduction process $gg\to ZZ \to e^+e^- \mu^+ \mu^-$, matched to the parton shower in the POWHEG framework. We take advantage of the POWHEG BOX tool for…

High Energy Physics - Phenomenology · Physics 2017-03-08 Simone Alioli , Fabrizio Caola , Gionata Luisoni , Raul Röntsch

In the framework of the littlest Higgs model with $T$ parity, we present complete calculations for the $A_H q_-$ $(q_-=u_-, \bar{u}_-,d_-, \bar{d}_-,c_-, \bar{c}_-,s_-, \bar{s}_-)$ associated production up to the QCD next-to-leading order…

High Energy Physics - Phenomenology · Physics 2014-01-17 Yang Xiao-Dong , Xiong Shou-Jian , Ma Wen-Gan , Zhang Ren-You , Guo Lei , Li Xiao-Zhou

The Higgs boson production associated with a $W$-boson and a photon at the Large Hadron Collider (LHC) can be used to probe the coupling between Higgs boson and vector gauge bosons and discover a signature of new physics. We present the…

High Energy Physics - Phenomenology · Physics 2013-10-04 Song Mao , Wan Neng , Li Gang , Ma Wen-Gan , Zhang Ren-You , Guo Lei , Zhou Ya-Jin , Guo Jian-You

We consider power corrections due to a finite top quark mass M_t to the production of a Higgs boson pair within the Standard Model at next-to-leading order (NLO) in QCD. Previous calculations for this process and at this precision were done…

High Energy Physics - Phenomenology · Physics 2014-07-28 Jonathan Grigo , Jens Hoff

In this article we describe simulations of the hadronic decay of Higgs bosons produced in association with vector bosons at linear and hadronic colliders. We use the Monte Carlo at next-to-leading-order MC@NLO matching prescription with the…

High Energy Physics - Phenomenology · Physics 2011-01-27 Oluseyi Latunde-Dada

We present a fully-exclusive next-to-next-to-leading order (NNLO) QCD calculation for vector boson production in hadron-hadron collisions. The calculation is implemented in a parton level Monte Carlo program, which includes the gamma-Z…

High Energy Physics - Phenomenology · Physics 2010-01-25 Giancarlo Ferrera

We present a calculation of the next-to-leading order (NLO) QCD corrections to gluon-induced electroweak gauge boson pair production, $gg \to ZZ$ and $gg \to W^+W^-$, matched to the PYTHIA8 parton shower in the POWHEG approach. The…

High Energy Physics - Phenomenology · Physics 2021-08-18 Simone Alioli , Silvia Ferrario Ravasio , Jonas M. Lindert , Raoul Röntsch

Accurate predictions for both signal and background events at the LHC are of paramount importance in order to confirm even the smallest deviations from Standard Model predictions. Next-to-leading order Monte Carlo event generators are an…

High Energy Physics - Phenomenology · Physics 2010-11-30 Carole Weydert

The computation of higher-order corrections to cross sections relevant at LHC involves the evaluation of phase-space integrals that exhibit soft and collinear divergences. The subtraction of these divergences is a key ingredient to obtain…

In this paper we present a next-to-next-to-leading order (NNLO) calculation of the process $pp\rightarrow \gamma\gamma$ that we have implemented into the parton level Monte Carlo code MCFM. We do not find agreement with the previous…

High Energy Physics - Phenomenology · Physics 2021-09-15 John M. Campbell , R. Keith Ellis , Ye Li , Ciaran Williams

The pair production of squarks is one of the main search channels for supersymmetry at the LHC. We present a fully differential calculation of the next-to-leading order (NLO) SUSY-QCD corrections to the on-shell production of a pair of…

High Energy Physics - Phenomenology · Physics 2014-02-17 Ryan Gavin , Christian Hangst , Michael Krämer , Margarete Mühlleitner , Mathieu Pellen , Eva Popenda , Michael Spira

We investigate QCD threshold resummation effects beyond the next-to-leading logarithmic (NLL) order for the process H1 H2->h1 h2 X at high invariant mass of the produced hadron pair. We take into account the color structure of the…

High Energy Physics - Phenomenology · Physics 2015-06-23 Patriz Hinderer , Felix Ringer , George F. Sterman , Werner Vogelsang