Beam spin asymmetry in the electroproduction of a pseudoscalar meson or a scalar meson off the scalar target

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

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    We discuss the electroproduction of a pseudoscalar (0-+) meson or a 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 number116008
    Pages (from-to)1-7
    Number of pages7
    JournalPhysical Review D
    Volume99
    Issue number11
    DOIs
    Publication statusPublished - 12 Jun 2019

    Funding

    We thank Prof. Kyungseon Joo for useful discussions on meson electroproduction processes. This work was supported by the U.S. Department of Energy (Grant No. DE-FG02-03ER41260). C. R. J. thanks the Jefferson Lab Theory Center for the hospitality during his visit in the midst of completing this work. H. M. C.’s work was in part supported by the National Research Foundation of Korea (NRF) (Grant No. NRF-2017R1D1A1B03033129). APPENDIX:

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