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The Drell-Yan production of charged lepton pairs is one of the key processes measured at hadron colliders. The QCD corrections to the cross section are known to order $\alpha_s^2$ and electroweak corrections are known to order $\alpha$. The…

高能物理 - 唯象学 · 物理学 2019-12-20 Matthias Heller , Andreas von Manteuffel , Robert M. Schabinger , Hubert Spiesberger

We compute the next-to-leading order QCD corrections to the ``direct'' part of the spin-dependent cross section for hadron-pair photoproduction. The calculation is performed using largely analytical methods. We present a brief…

高能物理 - 唯象学 · 物理学 2008-11-26 Christof Hendlmeier , Andreas Schafer , Marco Stratmann

We compute the Next-to-Next-to-Leading Order (NNLO) QCD corrections to the partonic reaction that dominates top-pair production at the Tevatron. This is the first ever NNLO calculation of an observable with more than two colored partons,…

高能物理 - 唯象学 · 物理学 2013-05-30 Peter Baernreuther , Michal Czakon , Alexander Mitov

We study the QCD corrections at next-to-next-to-leading order (NNLO) to the cross section for the hadronic pair-production of top quarks. We present new results in the high-energy limit using the well-known framework of k_t-factorization.…

高能物理 - 唯象学 · 物理学 2015-06-04 S. Moch , P. Uwer , A. Vogt

We present the computation of next-to-leading order (NLO) QCD corrections to di-photon production in association with two or three hard jets in pp collisions at a center-of-mass energy of 8 TeV. The inclusion of NLO corrections is shown to…

高能物理 - 唯象学 · 物理学 2015-06-18 Simon Badger , Alberto Guffanti , Valery Yundin

The first results on the complete next-to-next-to-leading order (NNLO) Quantum Chromodynamic (QCD) corrections to the production of di-leptons at hadron colliders in large extra dimension models with spin-2 particles are reported in this…

高能物理 - 唯象学 · 物理学 2018-10-29 Taushif Ahmed , Pulak Banerjee , Prasanna K. Dhani , M. C. Kumar , Prakash Mathews , Narayan Rana , V. Ravindran

We present the analytic total cross section of top quark pair production in electron-positron annihilation at next-to-next-to-leading order (NNLO) in Quantum Chromodynamics (QCD). By utilizing the optical theorem, the NNLO corrections are…

高能物理 - 唯象学 · 物理学 2024-09-10 Long-Bin Chen , Jian Wang , Yefan Wang

We consider Z' and W' models recently proposed to explain the top forward-backward asymmetry at the Tevatron. We present the next-to-leading order QCD corrections to associated production of such vector bosons together with top quarks at…

高能物理 - 唯象学 · 物理学 2015-03-20 J. Adelman , J. Ferrando , C. D. White

We calculate, for the first time, the next-to-next-to leading order (NNLO) QCD corrections to spin correlations in top quark pair production at the LHC. The NNLO corrections play an important role in the description of the corresponding…

高能物理 - 唯象学 · 物理学 2019-08-28 Arnd Behring , Michal Czakon , Alexander Mitov , Andrew S. Papanastasiou , Rene Poncelet

We study the electromagnetic Bethe-Heitler type contribution to neutrino-induced deeply virtual meson production (\nuDVMP). Such O(\alpha_{em})-corrections decrease with Q^{2} in the Bjorken regime less steeply than the standard \nuDVMP…

高能物理 - 唯象学 · 物理学 2013-03-12 B. Z. Kopeliovich , Ivan Schmidt , M. Siddikov

By applying a unitary transformation method, we have derived the leading-order corrections on the effective Hamiltonian of a dynamical model developed in Phys. Rev. C54, 2660 (1996) for electromagnetic pion production reactions. The…

核理论 · 物理学 2007-05-23 T. Sato , T. -S. H. Lee , T. Nakamura

We estimate the leading order amplitudes for exclusive photon and meson electroproduction reactions at large Q^2 in the valence region in terms of skewed quark distributions. As experimental investigations can currently only be envisaged at…

高能物理 - 唯象学 · 物理学 2016-09-06 M. Vanderhaeghen , P. A. M. Guichon , M. Guidal

We sum up the next-to-next-to-leading logarithmic virtual electroweak corrections to the high energy asymptotics of the neutral current four-fermion processes for light fermions to all orders in the coupling constants using the evolution…

高能物理 - 唯象学 · 物理学 2009-11-07 J. H. Kühn , S. Moch , A. A. Penin , V. A. Smirnov

In this paper we consider the next-to-next-to-leading order total cross section of Higgs boson pair production in the large top quark mass limit and compute four expansion terms in $1/m_t^2$. Good convergence is observed below the top quark…

高能物理 - 唯象学 · 物理学 2022-01-26 Joshua Davies , Florian Herren , Go Mishima , Matthias Steinhauser

We present a study of s-channel single top quark production at the upgraded Tevatron $p\bar{p}$ collider, including the next-to-leading order (NLO) QCD corrections to the production and the decay of the top quark. The "modified" narrow…

高能物理 - 唯象学 · 物理学 2011-03-23 Qing-Hong Cao , Reinhard Schwienhorst , C. -P. Yuan

I discuss single top quark production at the Tevatron and the LHC. The cross section, including soft-gluon threshold corrections through NNNLO, is presented for each partonic channel. The higher-order corrections provide significant…

高能物理 - 唯象学 · 物理学 2007-05-23 Nikolaos Kidonakis

We revisit the next-to-leading order (NLO) perturbative QCD corrections for the deeply virtual meson production (DVMP) process, exploring its phenomenology both in isolation and in a multichannel fit combined with deeply virtual Compton…

高能物理 - 唯象学 · 物理学 2024-03-15 Marija Čuić , Goran Duplančić , Krešimir Kumerički , Kornelija Passek-K.

We discuss the production of top--anti-top quark pairs in association with a hard jet at the Tevatron and at the LHC and we report on the calculation of the next-to-leading order QCD corrections to this process. Numerical results for the…

高能物理 - 唯象学 · 物理学 2009-04-14 Stefan Dittmaier , Peter Uwer , Stefan Weinzierl

Processes of electron-positron annihilation into charged pions and kaons are considered. Radiative corrections are taken into account exactly in the first order and within the leading logarithmic approximation in higher orders. A combined…

高能物理 - 唯象学 · 物理学 2009-10-30 A. B. Arbuzov , V. A. Astakhov , A. V. Fedorov , G. V. Fedotovich , E. A. Kuraev , N. P. Merenkov