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We develop a new systematic procedure for the Regge limit in perturbative QCD to arbitrary logarithmic order. The formalism relies on the IR structure and the gauge symmetry of the theory. We identify leading regions in loop momentum space…

High Energy Physics - Phenomenology · Physics 2009-11-10 Tibor Kucs

We discuss our recent results on azimuthal distributions in vector boson + jets and multi-jet production at the LHC, obtained from the matching of next-to-leading order (NLO) perturbative matrix elements with transverse momentum dependent…

With the ongoing Run 3 of the LHC and its upcoming High-Luminosity upgrade, there is a growing need to study observables with high precision both experimentally and theoretically. To increase precision on the theory side, improvements of…

High Energy Physics - Phenomenology · Physics 2024-04-01 Federico Silvetti

The possibility to measure jet-gap-jet final states in double-Pomeron-exchange events at the LHC is presented. In the context of the ATLAS experiment with additional forward physics detectors, cross sections for different experimental…

High Energy Physics - Phenomenology · Physics 2016-06-06 C. Marquet , C. Royon , M. Trzebinski , R. Zlebcik

We study the effect of soft gluon resummation on the gaps-between-jets cross-section at the LHC. We review the theoretical framework that enables one to sum logarithms of the hard scale over the veto scale to all orders in perturbation…

High Energy Physics - Phenomenology · Physics 2009-06-16 Simone Marzani , Jeffrey Forshaw , James Keates

We study power corrections to the differential thrust, heavy jet mass and C-parameter distributions in the two-jet kinematical region in e^+e^- annihilation. We argue that away from the end-point region, e>> \Lambda_{QCD}/Q, the leading…

High Energy Physics - Phenomenology · Physics 2009-10-31 G. P. Korchemsky , S. Tafat

For high-pT forward processes at the Large Hadron Collider (LHC), QCD logarithmic corrections in the hard transverse momentum and in the large rapidity interval may both be quantitatively significant. The theoretical framework to resum…

High Energy Physics - Phenomenology · Physics 2011-01-04 M. Deak , F. Hautmann , H. Jung , K. Kutak

We present theoretical predictions for five jet production in proton-proton collisions at next-to-leading order accuracy in QCD. Inclusive as well as differential observables are studied for collision energies of 7 and 8 TeV. In general the…

High Energy Physics - Phenomenology · Physics 2014-02-26 Simon Badger , Benedikt Biedermann , Peter Uwer , Valery Yundin

Jet cross sections in deeply inelastic scattering in the case of transverse photon exchange for the production of (1+1) and (2+1) jets are calculated in next-to-leading order QCD (here the `+1' stands for the target remnant jet, which is…

High Energy Physics - Phenomenology · Physics 2009-10-22 Dirk Graudenz

We perform a phenomenological study of $Z$ plus jet, Higgs plus jet and di-jet production at the Large Hadron Collider. We investigate in particular the dependence of the leading jet cross section on the jet radius as a function of the jet…

The production of invisible particles plays great importance in high energy physics. Large part of interesting electroweak processes include production of neutrinos, while many new physics scenarios predict the existence of similarly…

High Energy Physics - Experiment · Physics 2012-05-22 Marco Bentivegna , Qiuguang Liu , Fabrizio Margaroli , Karolos Potamianos

Within the framework of a high-twist approach, we show the first complete next-to-leading order calculation of transverse momentum broadening in semi-inclusive deeply inelastic $e+A$ scattering and Drell-Yan dilepton production in $p+A$…

High Energy Physics - Phenomenology · Physics 2015-03-09 Hongxi Xing , Zhong-Bo Kang , Enke Wang , Xin-Nian Wang

In this article, we investigate the $\cos2\phi_t$ azimuthal asymmetry in $e ~p\rightarrow e ~J/\psi ~Jet~ X$, where the $J/\psi$-jet pair is almost back-to-back in the transverse plane, within the framework of the generalized parton…

High Energy Physics - Phenomenology · Physics 2022-08-31 Raj Kishore , Asmita Mukherjee , Amol Pawar , Mariyah Siddiqah

Transverse momentum dependent distribution and fragmentation functions of unpolarized quarks inside unpolarized protons are extracted, for the first time, through a simultaneous analysis of semi-inclusive deep-inelastic scattering,…

High Energy Physics - Phenomenology · Physics 2018-01-26 Cristian Pisano , Alessandro Bacchetta , Filippo Delcarro , Marco Radici , Andrea Signori

We study the forward-backward azimuthal angular correlations of hadrons in association with multi-particle production in the central rapidity region in proton-proton collisions at the LHC. We apply the nucleon energy-energy correlator…

High Energy Physics - Phenomenology · Physics 2024-08-28 Yuxun Guo , Xiaohui Liu , Feng Yuan

The collision of two gravitationally interacting, ultra-relativistic, extended sources is being examined. This investigation classifies the transverse distributions that are collided for fixed collision energy, according to whether one or…

High Energy Physics - Theory · Physics 2015-06-12 Anastasios Taliotis

Using inelastic proton-proton interactions at sqrt(s) = 900 GeV and 7 TeV, recorded by the ATLAS detector at the LHC, measurements have been made of the correlations between forward and backward charged-particle multiplicities and, for the…

High Energy Physics - Experiment · Physics 2012-08-27 ATLAS Collaboration

We use (3+1)-dimensional hydrodynamics with exact longitudinal boost-invariance to study the influence of collision centrality and initial energy density on the transverse flow pattern and the angular distributions of particles emitted near…

High Energy Physics - Phenomenology · Physics 2009-10-09 Peter F. Kolb , Josef Sollfrank , Ulrich Heinz

Anisotropic flow and fluctuations are sensitive observables of the initial state effects in heavy ion collisions and are characterized by the medium properties and final state interactions. Using event-shape observables, one can constrain…

Nuclear Theory · Physics 2025-07-29 Suraj Prasad , Aswathy Menon K R , Raghunath Sahoo , Neelkamal Mallick

The process e^+ e^- to t \bar t H is considered in the kinematic end point region where the Higgs energy is close to its maximal energy. In perturbative QCD, using the loop expansion, the amplitudes are plagued by Coulomb singularities that…

High Energy Physics - Phenomenology · Physics 2009-11-11 Cailin Farrell , Andre H. Hoang