Impact of vector meson polarization on its interaction with matter

S. R. Gevorkyan; A. V. Guskov

doi:10.1140/epjc/s10052-023-12369-y

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2024) 84: 7
https://doi.org/10.1140/epjc/s10052-023-12369-y

Letter

Impact of vector meson polarization on its interaction with matter

S. R. Gevorkyan^a and A. V. Guskov

Joint Institute for Nuclear Research, 141980, Dubna, Russia

^a gevs@jinr.ru

Received: 27 October 2023
Accepted: 15 December 2023
Published online: 5 January 2024

Abstract

The production of unstable particles on different nuclei provides the possibility to determine the total cross section of the interaction of vector mesons $V = ρ, ω, φ, K^{* 0} (892), J / ψ$ $V=\rho ,\omega ,\varphi , K^{*0}(892),J/\psi$ etc. with nucleons. This interaction is defined by a set of amplitudes that correspond to the transverse (helicity $λ = \pm 1$ $\lambda =\pm 1$ ) or longitudinal ( $λ = 0$ $\lambda =0$ ) polarization of the vector meson. The total cross section for the interaction of transversely polarized vector mesons with nucleon $σ_{T} = σ (V_{T} N)$ $\sigma _T=\sigma (V_T N)$ has been extracted from the coherent photoproduction of vector mesons off nuclei, while the vector meson production in charge exchange reactions as $π^{\pm} (K^{\pm}) + A \to V^{0} (K^{* 0}) + A^{'}$ $\pi ^\pm (K^\pm )+A\rightarrow V^0(K^{*0})+A'$ provides the unique opportunity to obtain the not yet measured total cross section for longitudinally polarized vector meson interacting with nucleon $σ_{L} = σ (V_{L} N)$ $\sigma _L=\sigma (V_L N)$ . We shortly discuss the importance of the knowledge of $σ_{L}$ $\sigma _L$ and possibility to extract its value from experiments on nuclear target.

© The Author(s) 2024

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