We discuss the electroproduction of a spinless meson, i.e. pseudoscalar (0−+) or scalar (0++) meson, off the scalar target. The most general formulation of the differential cross section for the 0−+ or 0++ meson process involves only one or two hadronic form factors, respectively, on a scalar target. The Rosenbluth-type separation of the differential cross section provides the explicit relation between the hadronic form factors and the different parts of the differential cross section in a completely model-independent manner. The absence of the beam spin asymmetry for the pseudoscalar meson production provides a benchmark for the experimental data analysis. The measurement of the beam spin asymmetry for the scalar meson production may also provide a unique opportunity not only to explore the imaginary part of the hadronic amplitude in the general formulation but also to examine the significance of the chiral-odd generalized parton distribution (GPD) contribution in the leading-twist GPD formulation.
|Number of pages||5|
|Journal||Proceedings of Science|
|Early online date||19 May 2020|
|Publication status||Published - 26 May 2020|
|Event||2019 Light Cone - QCD on the Light Cone: From Hadrons to Heavy Ions, LC 2019 - Palaiseau, France|
Duration: 16 Sep 2019 → 19 Sep 2019