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

In this paper, 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 targe...

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Bibliographic Details
Published in:Physical review. D 2019-06, Vol.99 (11)
Main Authors: Ji, Chueng-Ryong, Choi, Ho-Meoyng, Lundeen, Andrew, Bakker, Bernard L. G.
Format: Article
Language:English
Subjects:
Astronomy & Astrophysics
NUCLEAR PHYSICS AND RADIATION PHYSICS
Physics
Online Access:Get full text
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Summary:In this paper, 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.
ISSN:2470-0010
2470-0029