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Charged particle energy spectra in e+e- annihilation are compared with the analytical predictions from the QCD evolution equation in the Modified Leading Log Approximation. With the nonperturbative initial condition shifted down to…

High Energy Physics - Phenomenology · Physics 2011-09-13 Sergio Lupia , Wolfgang Ochs

Fragmentation of heavy quarks into heavy-flavoured hadrons receives both perturbative and non-perturbative contributions. We consider perturbative QCD corrections to heavy quark production in $e^+e^-$ collisions to next-to-next-to-leading…

High Energy Physics - Phenomenology · Physics 2024-06-12 Leonardo Bonino , Matteo Cacciari , Giovanni Stagnitto

We compute next-to-next-to-leading order (NNLO) QCD corrections to neutral vector boson production in association with a charm jet at the LHC. This process is studied in the forward kinematics at $\sqrt{s}=13$ TeV, which may provide…

High Energy Physics - Phenomenology · Physics 2023-05-31 R. Gauld , A. Gehrmann-De Ridder , E. W. N. Glover , A. Huss , A. Rodriguez Garcia , G. Stagnitto

We review recent developments in the QCD description of jet production and modification in reactions with heavy nuclei at relativistic energies. Our goal is to formulate a perturbative expansion in the presence of nuclear matter that allows…

High Energy Physics - Phenomenology · Physics 2011-05-27 I. Vitev

Data from e+e- annihilation into hadrons collected by the JADE experiment at centre-of-mass energies between 14 and 44 GeV were used to study the 4-jet rate using the Durham algorithm as well as the first five moments of event shape…

High Energy Physics - Experiment · Physics 2007-05-23 S. Kluth

We compute the next-to-leading-order (NLO) QCD corrections to the Higgs pT distribution in Higgs production in association with a jet via gluon fusion at the LHC, with exact dependence on the mass of the quark circulating in the heavy-quark…

High Energy Physics - Phenomenology · Physics 2023-07-19 R. Bonciani , V. Del Duca , H. Frellesvig , M. Hidding , V. Hirschi , F. Moriello , G. Salvatori , G. Somogyi , F. Tramontano

We consider subleading power corrections to event shape variables in $e^+e^-$ collisions at the first order in the QCD coupling $\alpha_s$. We start from the jettiness variable $\tau_2$ and the $y_{23}$ resolution variable for the $k_T$ jet…

High Energy Physics - Phenomenology · Physics 2024-05-13 Luca Buonocore , Massimiliano Grazzini , Flavio Guadagni , Luca Rottoli

We present the CoLoRFulNNLO method to compute higher order radiative corrections to jet cross sections in perturbative QCD. We apply our method to the computation of event shape observables in electron-positron collisions at NNLO accuracy…

High Energy Physics - Phenomenology · Physics 2016-10-19 Vittorio Del Duca , Claude Duhr , Adam Kardos , Gábor Somogyi , Zoltán Szőr , Zoltán Trócsányi , Zoltán Tulipánt

A study of perturbative QCD calculations combined with power corrections to model hadronisation effects is presented. The QCD predictions are fitted to differential distributions and mean values of event shape observables measured in e+e-…

High Energy Physics - Experiment · Physics 2009-01-07 P. A. Movilla Fernandez , S. Bethke , O. Biebel , S. Kluth

We report the calculation of next-to-next-to-leading order (NNLO) QCD corrections in the purely gluonic channel to dijet production and related observables at hadron colliders. Our result represents the first NNLO calculation of a massless…

High Energy Physics - Phenomenology · Physics 2013-04-24 Aude Gehrmann-De Ridder , Thomas Gehrmann , E. W. N. Glover , Joao Pires

We present a detailed phenomenological study of Z-boson production in association with a jet through next-to-next-to-leading order (NNLO) in perturbative QCD. Fiducial cross sections and differential distributions for both 8 TeV and 13 TeV…

High Energy Physics - Phenomenology · Physics 2016-10-17 Radja Boughezal , Xiaohui Liu , Frank Petriello

We report on the calculation of the next-to-leading order QCD corrections to the production of top--anti-top quark pairs in association with a hard jet at the Tevatron and at the LHC. We present results for the t tbar + jet cross section…

High Energy Physics - Phenomenology · Physics 2008-11-26 S. Dittmaier , P. Uwer , S. Weinzierl

We present a QCD analysis of the cumulative out-of-event-plane momentum distribution in DIS process with emission of high p_t jets. We derive the all-order resummed result to next-to-leading accuracy and estimate the leading power…

High Energy Physics - Phenomenology · Physics 2010-02-03 A. Banfi , G. Marchesini , G. Smye , G. Zanderighi

We compute the cross section and differential distributions for the production of a Z boson in association with a hadronic jet to next-to-next-to-leading order (NNLO) in perturbative QCD, including the leptonic decay of the Z boson. We…

High Energy Physics - Phenomenology · Physics 2016-07-13 A. Gehrmann-De Ridder , T. Gehrmann , E. W. N. Glover , A. Huss , T. A. Morgan

We present the calculations of the complete next-to-leading order (NLO) QCD corrections (including supersymmetric QCD) to the inclusive total cross sections of the associated production processes $pp\to A^0Z^0+X$ in the Minimal…

High Energy Physics - Phenomenology · Physics 2009-11-11 Qiang Li , Chong Sheng Li , Jian Jun Liu , Li Gang Jin , C. -P. Yuan

We examine properties of small-radius jets, focusing on phenomenological applications to the inclusive jet spectrum. We match fixed-order calculations with the leading-logarithmic resummation of the jet radius (LL$_R$), and propose a new…

High Energy Physics - Phenomenology · Physics 2016-06-13 Frédéric A. Dreyer

We describe the antenna subtraction method for treating real emission singularities in the calculation of jet observables at NNLO accuracy, in particular in view of the computation $e^+e^- \to 3$ jets at NNLO.

High Energy Physics - Phenomenology · Physics 2008-11-26 A. Gehrmann-De Ridder , T. Gehrmann , E. W. N. Glover

The perturbative QCD provides a good overall description of both the jet and hadron multiplicities in the $e^+e^-$ annihilation reaction. In this description the hadrons are considered as dual to partons at a small resolution parameter…

High Energy Physics - Phenomenology · Physics 2007-05-23 Wolfgang Ochs

We report on the sector decomposition approach to the double real radiation part of e^+e^- to 3 jets at NNLO.

High Energy Physics - Phenomenology · Physics 2009-11-11 G. Heinrich

A thorough verification of the distinct differences in the properties of quark and gluon jets is considered as one of the most instructive tests of the basic ideas of QCD. In the real life experiments such a comparison appears to be quite a…

High Energy Physics - Phenomenology · Physics 2011-09-13 P. Eden , G. Gustafson , V. A. Khoze