The impact of vector mesons polarization on meson-nucleon interaction

16th Workshop on High Energy Spin Physics

Gevorkyan, Sergey^1

LHEP, Joint Institute for Nuclear Research, Russia^1

关键词: Beam energies;    Helicities;    Jefferson Lab;    Measurements of;    Meson-nucleon interactions;    Photoproductions;    Transverse polarization;    Vector meson;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/678/1/012033/pdf
DOI  :  10.1088/1742-6596/678/1/012033

来源: IOP

【 摘 要 】

Production of unstable particles off nuclei allows to determine the total cross section of the unstable particle interaction with nucleons. The interaction of vector mesons V(ρ, ω, φ) with nucleons are defined by a set of amplitudes corresponding to the transverse polarization of the vector meson (helicity λ = 1) meson or longitudinal one (λ = 0). Whereas the total cross section for the interaction of the transversely polarized vector meson with nucleon σT= σ(VTN) can be extract from the coherent photoproduction, measurements of vector meson interaction with nucleon σL= σ(VLN). As a good tool for such investigation we proposed the photoproduction of ω mesons on the set of nuclei in the incoherent region. Such experiment can be done using the feasibility of the new experiment GlueX at Jefferson Lab, designed to study the photoproduction of mesons in a large beam energy range up to 12 GeV.