Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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Ya. D. Krivenko-Emetov^1,2,3,*, B. I. Sydorenko<sup>2

1</sup> National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Kyiv, Ukraine
² Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
³ Taras Shevchenko National University of Kyiv, Kyiv, Ukraine

^*Corresponding author. E-mail address: y.kryvenko-emetov@kpi.ua

Abstract: In this work, within the framework of the Glauber - Sitenko approximation, we present an analysis of the differential cross section for deuteron breakup with proton emission in the reaction H(d, p)X at small proton emission angles (θ_p < 7 μrad). The study employs several parameterizations of the deuteron wave function, including the single-Gaussian, the multi-Gaussian K2 parameterization, and models based on the Av18 and Nijm I nucleon-nucleon potentials. Particular attention is paid to the effects of small longitudinal components of the transferred momentum (|Q_z| ≤ 0.5 GeV/c in the laboratory frame) and the transverse momentum of the proton-neutron pair (p_⊥ = (p_x, 0) ≤ 0.5 GeV/c) in the antilaboratory reference frame. The results are compared with available experimental data, especially in the region of longitudinal momenta k_z = p₃^* = 0.25 – 0.5 GeV/c (in the antilaboratory frame), where quark effects are expected to become significant. Calculations show an increase in the differential cross section with increasing transverse momentum, as well as a small shift – and a noticeable enhancement – of the cross section maximum when the longitudinal component Q_z is included.

Keywords: deuteron, diffractive breakup, relativistic effects, quark structure, differential cross section, Glauber - Sitenko approach, longitudinal momentum, transverse momentum, dibaryon, d^*(2380).

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