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The particle production in photon-photon ($\gamma \gamma$) interactions present in electron-ion collisions is investigated. We present calculations for the total cross sections and event rates related to the production of light mesons…

高能物理 - 唯象学 · 物理学 2024-09-04 Carlos A. Bertulani , Reinaldo Francener , Victor P. Goncalves , Juciene T. de Souza

The photoproduction of bottomonium-like states $Z_{b}(10610)$ and $Z_{b}(10650)$ via $\gamma p$ scattering is studied within an effectiv Lagrangian approach and the vector-meson-dominance model. The Regge model is employed to calculate the…

高能物理 - 唯象学 · 物理学 2021-08-06 Xiao-Yun Wang , Wei Kou , Qing-Yong Lin , Ya-Ping Xie , Xurong Chen , Alexey Guskov

Photonuclear reactions are induced by the strong electromagnetic field generated by ultrarelativistic heavy-ion collisions. These processes have been extensively studied in ultraperipheral collisions, where the impact parameter is larger…

核实验 · 物理学 2024-02-21 Afnan Shatat

The production of the heavy $(c\bar{c})$-quarkonium, $(c\bar{b})$-quarkonium and $(b\bar{b})$-quarkonium states ($(Q\bar{Q'})$-quarkonium for short), via the $W^+$ semi-inclusive decays, has been systematically studied within the framework…

高能物理 - 唯象学 · 物理学 2015-03-19 Qi-Li Liao , Xing-Gang Wu , Jun Jiang , Zhi Yang , Zhen-Yun Fang

We improve the pNRQCD approach to annihilation processes of heavy quarkonium and make first pNRQCD predictions for exclusive electromagnetic production of heavy quarkonium. We consider strongly coupled quarkonia, i.e., quarkonia that are…

高能物理 - 唯象学 · 物理学 2020-04-20 Nora Brambilla , Hee Sok Chung , Daniel Müller , Antonio Vairo

In this preprint we analyze the inclusive photoproduction of heavy charmonia-bottomonia pairs in the Color Glass Condensate framework and demonstrate that the cross-section of the process is sensitive to dipole and quadrupole forward…

高能物理 - 唯象学 · 物理学 2024-01-30 Marat Siddikov

Using the two-component model that includes charmonium production from initial nucleon-nucleon hard scattering and regeneration in the produced quark-gluon plasma, we study $J/\psi$ production in heavy ion collisions at SPS, RHIC and LHC.…

核理论 · 物理学 2015-05-27 Taesoo Song , Kyong Chol Han , Che Ming Ko

We investigate the recently reported threshold enhancement in top-antitop production at the LHC in a finite, gauge-covariant, entire-function-regulated nonlocal quantum field theory framework. Our results demonstrate that the observed…

综合物理 · 物理学 2026-05-08 E. J. Thompson

We study the photoproduction of exclusive $2\pi^+2\pi^-$ mesons in ultra-peripheral heavy-ion collisions at RHIC and LHC energies. Predictions in photon-nucleus interactions are calculated for various resonances at central and forward…

高能物理 - 唯象学 · 物理学 2020-08-26 Mariola Klusek-Gawenda , J. Daniel Tapia Takaki

Nuclear suppression of charmonium production in proton-nucleus interactions is poorly understood, what restrains our attempts to single out unusual effects in heavy ion collisions. We develop a phenomenological approach, based on the…

高能物理 - 唯象学 · 物理学 2008-02-03 B. Z. Kopeliovich

The exclusive $\Upsilon$ photoproduction in proton-proton and proton - nucleus collisions at LHC energies is investigated using the color dipole formalism and considering different models for the $\Upsilon$ wave function and forward dipole…

高能物理 - 唯象学 · 物理学 2015-06-22 V. P. Goncalves , B. D. Moreira , F. S. Navarra

We study heavy quarkonium within the light-front Hamiltonian formalism. Our effective Hamiltonian is based on the holographic QCD confining potential and the one-gluon exchange interaction with a running coupling. The obtained spectra are…

核理论 · 物理学 2017-09-13 Yang Li

The quarkonium plus photon production in coherent hadron-hadron interactions at the LHC is studied using the non-relativistic QCD factorization formalism. We investigate a set of kinematic distributions and compute the total cross sections…

高能物理 - 唯象学 · 物理学 2018-04-27 M. M. Machado , G. Gil da Silveira

We study the possibility to probe the unpolarized and linearly polarized transverse momentum- dependent gluon distributions in unpolarized pp collision in charmonium and bottomonium produc- tion, employing non-relativistic QCD (NRQCD) based…

高能物理 - 唯象学 · 物理学 2017-03-08 Asmita Mukherjee , Sangem Rajesh

In a recent publication we have calculated elastic charmonium production in ep collisions employing realistic charmonia wave functions and dipole cross sections and have found good agreement with the data in a wide range of s and Q^2. Using…

高能物理 - 唯象学 · 物理学 2009-11-07 Yu. P. Ivanov , B. Z. Kopeliovich , A. V. Tarasov , J. Huefner

We discuss the theory of inclusive production of heavy quarkonium, the comparison between theory and experiment, and the expected nuclear effects in cold nuclear targets. We also present predictions, based on Nonrelativistic QCD (NRQCD),…

高能物理 - 唯象学 · 物理学 2007-05-23 Geoffrey T. Bodwin , Jungil Lee , Ramona Vogt

We report on our recent investigations in photonuclear production of heavy quarks and vector meson in ultraperipheral heavy ion collisions. In particular, our theoretical predictions are compared with the recent experimental measurements on…

高能物理 - 唯象学 · 物理学 2008-11-26 V. P. Goncalves , M. V. T. Machado

A constituent parton picture of hadrons with logarithmic confinement naturally arises in weak coupling light-front QCD. Confinement provides a mass gap that allows the constituent picture to emerge. The effective renormalized Hamiltonian is…

高能物理 - 唯象学 · 物理学 2009-10-28 Martina M. Brisudova , Robert J. Perry , Kenneth G. Wilson

The photonuclear production of vector mesons in ultraperipheral heavy ion collisions is investigated within the QCD color dipole picture, with particular emphasis on the saturation model. The integrated cross section and the rapidity…

高能物理 - 唯象学 · 物理学 2011-09-13 V. P. Goncalves , M. V. T. Machado

In relativistic heavy ion collisions, top quarks can be produced by photon-gluon fusion when a photon from the Weizs\"acker-Williams virtual photon field of one nucleus interacts with a gluon in the other nucleus. Photoproduction with heavy…

高能物理 - 唯象学 · 物理学 2009-01-07 Spencer R. Klein , Joakim Nystrand , Ramona Vogt