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We calculate the cross section of J/psi plus jet inclusive production in gamma gamma collisions at next-to-leading order within the factorization formalism of nonrelativistic quantum chromodynamics (NRQCD) focusing on direct…

High Energy Physics - Phenomenology · Physics 2011-03-23 M. Klasen , B. A. Kniehl , L. N. Mihaila , M. Steinhauser

In this paper, we report on the calculation of the cross section of J/\Psi plus jet inclusive production in direct two-photon collisions at next-to-leading order within the factorization formalism of nonrelativistic quantum chromodynamics…

High Energy Physics - Phenomenology · Physics 2011-03-23 L. Mihaila

We systematically investigate the production of $J/\psi + \gamma$ in $\gamma\gamma$ collisions within nonrelativistic QCD (NRQCD) factorization, with the direct-photon channel calculated specifically up to the next-to-leading order in…

High Energy Physics - Phenomenology · Physics 2026-02-26 Ying-Zhao Jiang , Zhan Sun

We study the production of a J/psi meson in association with one or two jets in gamma gamma collisions concentrating on the direct-photon contribution, which is expected to be dominant for large J/psi-meson transverse momentum and/or large…

High Energy Physics - Phenomenology · Physics 2011-03-23 M. Klasen , B. A. Kniehl , L. Mihaila , M. Steinhauser

The production of J/Psi mesons in gamma gamma collisions allows for a test of factorization in color-octet processes as predicted by NRQCD and observed at the Tevatron. We calculate the cross sections for J/Psi production with direct and…

High Energy Physics - Phenomenology · Physics 2009-11-07 Michael Klasen

We calculate the next-to-leading order (NLO) quantum chromodynamics (QCD) correction to the exclusive process $\gamma+\gamma\to J/\psi+J/\psi$ in the framework of non-relativistic QCD (NRQCD) factorization formalism. The cross sections at…

High Energy Physics - Phenomenology · Physics 2020-06-11 Hao Yang , Zi-Qiang Chen , Cong-Feng Qiao

We investigate the inclusive production of prompt J/psi mesons in polarized hadron-hadron, photon-hadron, and photon-photon collisions in the factorization formalism of nonrelativistic quantum chromodynamics (NRQCD) providing all…

High Energy Physics - Phenomenology · Physics 2009-11-10 M. Klasen , B. A. Kniehl , L. Mihaila , M. Steinhauser

The production of J/Psi mesons in photon photon collisions allows for a test of factorization in color-octet processes as predicted by NRQCD and observed at the Tevatron. We calculate the cross sections for J/Psi production with direct and…

High Energy Physics - Phenomenology · Physics 2007-05-23 Michael Klasen

In this work, we present a next-to-leading-order (NLO) study of $J/\psi + \gamma$ production via photon-photon fusion in proton-proton ultraperipheral collisions (UPCs) at $\sqrt{s_{NN}} = 14$ TeV. The calculation is performed within the…

High Energy Physics - Phenomenology · Physics 2025-10-14 Meng-Kun Jia , Xiao-Bo Jin , Kui-Yong Liu , Guang-Zhi Xu

We study the production of a prompt J/psi meson in association with a prompt photon in ep deep-inelastic scattering within the factorisation formalism of non-relativistic quantum chromodynamics (NRQCD) and demonstrate that this process…

High Energy Physics - Phenomenology · Physics 2011-03-23 Bernd A. Kniehl , Caesar P. Palisoc

Within the framework of nonrelativistic-QCD factorization, we calculate both the next-to-leading-order relativistic and QCD corrections to prompt $J/\psi$ pair production, with feeddown from $\psi(2S)$ mesons, via photon-photon collisions…

High Energy Physics - Phenomenology · Physics 2024-04-16 Zhi-Guo He , Xiao-Bo Jin , Bernd A. Kniehl , Rong Li

We employ a small $x$ Color Glass Condensate (CGC)+ Non-Relativistic QCD (NRQCD) formalism to compute $J/\psi$ production at low $p_\perp$ in proton-proton collisions at collider energies. Very good agreement is obtained for total…

High Energy Physics - Phenomenology · Physics 2014-11-06 Yan-Qing Ma , Raju Venugopalan

We calculate the cross section of inclusive direct J/psi photoproduction at next-to-leading order within the factorization formalism of nonrelativistic quantum chromodynamics, for the first time including the full relativistic corrections…

High Energy Physics - Phenomenology · Physics 2010-11-19 Mathias Butenschoen , Bernd A. Kniehl

The prompt $J/\psi$ photoproduction within the non-relativistic QCD (NRQCD) framework at the future Circular Electron Positron Collider (CEPC) is studied, including the contributions from both direct and resolved photons. Employing…

High Energy Physics - Phenomenology · Physics 2021-02-03 Xi-Jie Zhan , Jian-Xiong Wang

Based on the factorization framework of nonrelativistic quantum chromodynamics, we study the associated $J/\psi+c+\bar{c}$ photoproduction process at next-to-leading order in $\alpha_s$ and leading order in the velocity expansion. The total…

High Energy Physics - Phenomenology · Physics 2024-05-10 Qi-Ming Feng , Cong-Feng Qiao

We calculate the cross sections of inclusive J/psi production in photoproduction and two-photon scattering, involving both direct and resolved photons, and in e^+e^- annihilation at next-to-leading order (NLO) within the factorization…

High Energy Physics - Phenomenology · Physics 2015-05-28 Mathias Butenschoen , Bernd A. Kniehl

We provide a detailed study of prompt double $J/\psi$ production within the non-relativistic QCD (NRQCD) framework in proton-proton collisions at the LHC. We confront the recent LHC data with the results obtained at leading-order (LO) in…

High Energy Physics - Phenomenology · Physics 2016-06-13 S. P. Baranov , Amir H. Rezaeian

The impact of Next-to-Leading Order (NLO) QCD corrections to the differential distributions of J/psi and Upsilon mesons produced inclusively in gamma-gamma collisions is discussed for the kinematical conditions of LEP II for DELPHI and at…

High Energy Physics - Phenomenology · Physics 2023-12-08 Yelyzaveta Yedelkina , Jean-Philippe Lansberg , Maxim Nefedov

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

We calculate the cross section for forward $\mathrm{J}/\psi$ production in proton-proton and minimum bias proton-lead collisions using the Color Glass Condensate (CGC) and Non-Relativistic QCD (NRQCD) formalism consistently with Deep…

High Energy Physics - Phenomenology · Physics 2024-09-04 Patricia Gimeno-Estivill , Tuomas Lappi , Heikki Mäntysaari
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