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

doi:10.22323/1.374.0049

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

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

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 language	English
Article number	(LC2019)049
Number of pages	5
Journal	Proceedings of Science
Volume	374
Early online date	19 May 2020
DOIs	https://doi.org/10.22323/1.374.0049
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 Sept 2019 → 19 Sept 2019

Bibliographical note

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

Funding

∗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. ?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.

Funders	Funder number
US Department of Energy
U.S. Department of Energy	DE-FG02-03ER41260
National Research Foundation of Korea	NRF-2017R1D1A1B03033129

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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10.22323/1.374.0049

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title = "Beam spin asymmetry benchmark in the spinless meson electroproduction off the scalar target",

abstract = "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.",

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AU - Ji, Chueng Ryong

AU - Choi, Ho Meoyng

AU - Lundeen, Andrew

AU - Bakker, Bernard L.G.

N1 - Volume 374: Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions (LC2019)

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N2 - 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.

AB - 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.

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

Abstract

Bibliographical note

Funding

UN SDGs

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