Antoni Szczurek

Impact of inelastic corrections on $\gamma \gamma \to \gamma \gamma$ scattering from UPC at the LHC

Antoni Szczurek

The current theoretical estimations lead to cross-sectionsfor $AA \to \gamma \gamma AA$ which are somewhatsmaller than the measured ones by the ATLAS and CMS Collaborations,In our recent paper, we estimated the contribution of inelastic channels to the Light-by-Light (LbL) scattering in ultraperipheral …

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From photons to dikaon - theoretical insights into $K^+K^-$ production in nuclear collisions

Mariola Kłusek-Gawenda, Antoni Szczurek, N. Murali Krishna

The production of kaon pairs can proceed via photoproduction ($\gamma$-Pomeron interaction) or photon–photon fusion ($\gamma\gamma$). An important contribution to this process arises from the decays of scalar, tensor, and vector mesons. This study provides a comprehensive description of dikaon production at both …

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Probing the \(X(6900)\) via Two-photon Production in Ultraperipheral Collisions

Longjie Chen, Wolfgang M. Schäfer, Antoni Szczurek

Studies of the internal structure of hadrons have been a main focus in particle physics since perturbative Quantum Chromodynamics (p-QCD) was established as the theory of the strong interaction. While the constituent quark model provided a successful framework for the investigation of …

Two-photon transition form factor of the eta_c meson including relativistic and NNLO corrections

Izabela Babiarz, Melih A. Ozcelik, Chris A. Flett, Wolfgang M. Schäfer et autres

Numerical data of the transition form factor of eta_c that serve the reproducibility of results.

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Numerical data and plotting code for the fully charmed tetraquark two-photon decays and UPC cross sections

Longjie Chen, Wolfgang M. Schäfer, Antoni Szczurek

This dataset provides the raw numerical data and the code used for plotting the figures of the manuscript arXiv: 2605.22500. The data comprise the two-photon decay widths and ultraperipheral-collision production cross sections of fully charmed tetraquarks, computed within NRQCD factorization at leading …

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Production of π+π− pairs in diffractive photon-proton and in proton-proton collisions revisited, in particular concerning the Drell-Söding contribution

Piotr Lebiedowicz, Otto Nachtmann, Antoni Szczurek

A bstract We discuss the exclusive photoproduction of π + π − pairs in photon-proton and in proton-proton collisions at high energies. The ρ 0 , ω , f 2 (1270), and non-resonant (Drell-Söding) contributions are considered. The calculation is based on …

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Probing GPDs in exclusive electroproduction of dijets

Trambak Jyoti Chall, Marta Łuszczak, Wolfgang M. Schäfer, Antoni Szczurek

We summarize the formalism for calculating the exclusive dijet production in e p → e ′ j j p in collinear QCD factorization, using generalized parton distributions as the soft hadronic input modeled in the double distribution approach. We include all leading-order …

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Neutron emission from the photon-induced reactions in UPC of heavy ions - impact of new ALICE data

Antoni Szczurek, Pawel Jucha, Mariola Kłusek-Gawenda, K. Mazurek

We calculate the cross section for the production of a given number of neutrons in UPC of 208Pb+208 Pb. A simple model which takes into account the fact that only a part of the energy is available in the thermalized phase, proposed …

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Competition of χc(2P) quarkonia and continuum in e+e−→e+e−DD¯

Izabela Babiarz, Piotr Lebiedowicz, Wolfgang M. Schäfer, Antoni Szczurek

We discuss the production of DD¯ pairs in e+e− collisions, where D refers to either D0 or D+. The continuum mechanism with the t/u-channel vector-meson D* exchanges are considered. The results of the calculation depend on the parameter of the off-shell form-factor …

Impact of new results from ultraperipheral collisions on modeling the proton and neutron emission in photon-induced nuclear processes

P. Jucha, K. Mazurek, Antoni Szczurek, Krzysztof Pysz

Ultrarelativistic collisions of heavy ions provide a rich spectrum of possibilities to discuss the response of the nucleus to photons. Newly published neutron and proton multiplicities measured in the ALICE experiment in ultraperipheral collisions allow us to investigate the influence of the …

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Neutron emission from the photon-induced reactions in UPC of heavy ions - impact of new ALICE data

Antoni Szczurek, P. Jucha, Mariola Kłusek-Gawenda, K. Mazurek

We calculate the cross section for the production of a given number of neutrons in UPC of 208 Pb + 208 Pb. A simple model which takes into account the fact that only a part of the energy is available in the …

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Transition form-factor for $$\eta _Q$$ at NNLO in the strong coupling $$\alpha _s$$ and with all-order $$v^2$$ resummation

Izabela Babiarz, Chris A. Flett, Melih A. Ozcelik, Wolfgang M. Schäfer et autres

Abstract In this work, we discuss both relativistic and perturbative QCD corrections to the transition form-factor $$\mathcal{F}_{\eta _Q}{(t_1,t_2)}$$ F η Q ( t 1 , t 2 ) for the process $$\gamma ^*(q_1) \gamma ^*(q_2) \leftrightarrow \eta _Q(P)$$ γ ∗ ( q …

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