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We study a large-$p_T$ three-photon production in proton-proton collisions at the LHC. We use the leading order (LO) approximation of the parton Reggeization approach consistently merged with the next-to-leading order corrections originated…

High Energy Physics - Phenomenology · Physics 2024-02-20 Anton Karpishkov , Vladimir Saleev

In the article, we study the processes of single isolated photon production at the LHC energies in the framework of the Parton Reggeization Approach taking into account LO and NLO* contributions, the last one includes only tree-level…

High Energy Physics - Phenomenology · Physics 2024-08-28 Alexey Chernyshev , Vladimir Saleev

Recently, the ATLAS data of isolated three-photon production showed that the next-to-leading order (NLO) collinear factorization is not enough to describe experimental data. Therefore, one needs to calculate the cross section beyond the…

High Energy Physics - Phenomenology · Physics 2021-11-04 R. Kord Valeshabadi , M. Modarres , S. Rezaie

The hadroproduction of single isolated photon at high energies is studied within the framework of the NLO${}^\star$ approximation of the Parton Reggeization Approach based on the modified Multi-Regge limit of the hard scattering QCD…

High Energy Physics - Phenomenology · Physics 2024-12-31 Alexey Chernyshev , Vladimir Saleev

We study the associated $J/{\psi}$ and direct photon production in the high-energy factorization, as it is formulated in the parton Reggeization approach, using two different models for the hadronization of a heavy quark-antiquark pair into…

High Energy Physics - Phenomenology · Physics 2025-04-07 Lev Alimov , Anton Karpishkov , Vladimir Saleev

The hadroproduction of prompt isolated photon pairs at high energies is studied in the NLO* framework of the Parton Reggeization Approach. The real part of the NLO corrections is computed, and the procedure for the subtraction of double…

High Energy Physics - Phenomenology · Physics 2015-12-02 Maxim Nefedov , Vladimir Saleev

In this paper, we present the next-to-leading order predictions for three photon production in the Standard Model, matched to the parton shower using the MC@NLO formalism. We have studied the role of parton shower on various observables and…

High Energy Physics - Phenomenology · Physics 2014-12-12 M. K. Mandal , Prakash Mathews , V. Ravindran , Satyajit Seth

We consider the prompt photon production at modern high energy colliders in the framework of $k_T-$factorization approach. We compare our theoretical predictions with recent experimental data at HERA and Tevatron, empahasizing the…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. V. Lipatov , N. P. Zotov

The hadroproduction of the radially excited heavy-quarkonium states $\psi(2S)$ and $\Upsilon(3S)$ at high energies is studied in the parton reggeization approach and the factorization formalism of nonrelativistic QCD at lowest order in the…

High Energy Physics - Phenomenology · Physics 2016-09-20 B. A. Kniehl , M. A. Nefedov , V. A. Saleev

The prompt photon production in hadronic collisions has a long history of providing information on the substructure of hadrons and testing the perturbative techniques of QCD. Some valuable information about the parton densities in the…

High Energy Physics - Phenomenology · Physics 2017-03-14 Muhammad Goharipour , Hossein Mehraban

We present next-to-next-to-leading-order (NNLO) QCD corrections to the production of three isolated photons in hadronic collisions at the fully differential level. We employ qT subtraction within MATRIX and an efficient implementation of…

High Energy Physics - Phenomenology · Physics 2021-01-05 Stefan Kallweit , Vasily Sotnikov , Marius Wiesemann

The paper presents the results of calculations of the cross sections for the production of $DD$-pairs at centre-of-mass energies $\sqrt{s}=7$ and $13$ TeV in the parton Reggeization approach. The contribution of both single and double…

High Energy Physics - Phenomenology · Physics 2026-05-06 Lev Alimov , Vladimir Saleev

Heavy quarkonium production in the framework of the nonrelativistic quantum chromodynamics and leading order of the parton Reggeization approach at the Tevatron and LHC Colliders is discussed. The new results, which are reviewed in this…

High Energy Physics - Phenomenology · Physics 2014-10-24 Maxim Nefedov , Vladimir Saleev

We present a complete description of top quark pair production in association with a hard photon in the di-lepton decay channel. The calculation is performed at NLO QCD and includes all resonant and non-resonant Feynman diagrams,…

High Energy Physics - Phenomenology · Physics 2025-02-07 Daniel Stremmer , Malgorzata Worek

We cure the perturbative instability of the total-inclusive-photoproduction cross sections of vector $S$-wave quarkonia observed at high photon-proton-collision energies ($\sqrt{s_{\gamma p}}$) in Next-to-Leading Order (NLO)…

High Energy Physics - Phenomenology · Physics 2023-12-11 Jean-Philippe Lansberg , Maxim Nefedov , Melih A. Ozcelik

The ratio of the cross sections for inclusive isolated-photon production in $pp$ collisions at centre-of-mass energies of 13 and 8 TeV is measured using the ATLAS detector at the LHC. The integrated luminosities of the 13 TeV and 8 TeV…

High Energy Physics - Experiment · Physics 2019-05-31 ATLAS Collaboration

We calculate the photoproduction of heavy quarks in proton-proton collisions at RHIC, Tevatron and LHC energies. The integrated cross section and the rapidity distributions for open charm and bottom production are computed employing sound…

High Energy Physics - Phenomenology · Physics 2011-01-25 V. P. Goncalves , M. V. T. Machado

We study three and four jet production in hadronic collisions at next-to-leading order accuracy in massless QCD. We cross check results previously obtained by the BlackHat collaboration for the LHC with a centre-of-mass energy of sqrt(s)=7…

High Energy Physics - Phenomenology · Physics 2015-06-11 Simon Badger , Benedikt Biedermann , Peter Uwer , Valery Yundin

We calculate large mass diphoton exclusive photoproduction in the framework of collinear QCD factorization at next to leading order in {\alpha}s and at leading twist. Collinear divergences of the coefficient function are absorbed by the…

High Energy Physics - Phenomenology · Physics 2021-08-02 Oskar Grocholski , Bernard Pire , Paweł Sznajder , Lech Szymanowski , Jakub Wagner

Motivated by hints for a light Standard Model-like Higgs boson and a shift in experimental attention towards electroweak supersymmetry particle production at the CERN LHC, we update in this paper our precision predictions at next-to-leading…

High Energy Physics - Phenomenology · Physics 2013-10-11 Benjamin Fuks , Michael Klasen , David R. Lamprea , Marcel Rothering
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