Beam spin asymmetry benchmark in the spinless meson electroproduction off the scalar target

Chueng Ryong Ji*, Ho Meoyng Choi, Andrew Lundeen, Bernard L.G. Bakker

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review


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.

Original languageEnglish
Article number(LC2019)049
Number of pages5
JournalProceedings of Science
Early online date19 May 2020
Publication statusPublished - 26 May 2020
Event2019 Light Cone - QCD on the Light Cone: From Hadrons to Heavy Ions, LC 2019 - Palaiseau, France
Duration: 16 Sept 201919 Sept 2019

Bibliographical note

Volume 374: Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions (LC2019)


∗This work was supported in part by the US Department of Energy under Grant No. DE-FG02-03ER41260 and by the National Research Foundation of Korea (NRF) under Grant No. NRF-2017R1D1A1B03033129. †Speaker.

FundersFunder number
US Department of Energy
U.S. Department of EnergyDE-FG02-03ER41260
National Research Foundation of KoreaNRF-2017R1D1A1B03033129


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