Transverse Beam Spin Asymmetries in Forward-Angle Elastic Electron-Proton Scattering

D. S. Armstrong; Angela Biselli

doi:10.1103/PhysRevLett.99.092301

Transverse Beam Spin Asymmetries in Forward-Angle Elastic Electron-Proton Scattering

D. S. Armstrong, Angela Biselli

Fairfield University

Research output: Contribution to journal › Article › peer-review

Abstract

We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely polarized 3 GeV electrons from unpolarized protons at Q2=0.15, 0.25 (GeV/c)2. The results are inconsistent with calculations solely using the elastic nucleon intermediate state and generally agree with calculations with significant inelastic hadronic intermediate state contributions. An provides a direct probe of the imaginary component of the 2γ exchange amplitude, the complete description of which is important in the interpretation of data from precision electron-scattering experiments.

Original language	American English
Journal	Physical Review Letters
Volume	99
DOIs	https://doi.org/10.1103/PhysRevLett.99.092301
State	Published - Jan 1 2007

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Physical Sciences and Mathematics
Physics

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Transverse Beam Spin Asymmetries in Forward-Angle Elastic ElectroFinal published version, 248 KBLicense: CC BY

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title = "Transverse Beam Spin Asymmetries in Forward-Angle Elastic Electron-Proton Scattering",

abstract = " We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely polarized 3 GeV electrons from unpolarized protons at Q2=0.15, 0.25 (GeV/c)2. The results are inconsistent with calculations solely using the elastic nucleon intermediate state and generally agree with calculations with significant inelastic hadronic intermediate state contributions. An provides a direct probe of the imaginary component of the 2γ exchange amplitude, the complete description of which is important in the interpretation of data from precision electron-scattering experiments.",

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N2 - We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely polarized 3 GeV electrons from unpolarized protons at Q2=0.15, 0.25 (GeV/c)2. The results are inconsistent with calculations solely using the elastic nucleon intermediate state and generally agree with calculations with significant inelastic hadronic intermediate state contributions. An provides a direct probe of the imaginary component of the 2γ exchange amplitude, the complete description of which is important in the interpretation of data from precision electron-scattering experiments.

AB - We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely polarized 3 GeV electrons from unpolarized protons at Q2=0.15, 0.25 (GeV/c)2. The results are inconsistent with calculations solely using the elastic nucleon intermediate state and generally agree with calculations with significant inelastic hadronic intermediate state contributions. An provides a direct probe of the imaginary component of the 2γ exchange amplitude, the complete description of which is important in the interpretation of data from precision electron-scattering experiments.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/23

U2 - 10.1103/PhysRevLett.99.092301

DO - 10.1103/PhysRevLett.99.092301

M3 - Article

VL - 99

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Transverse Beam Spin Asymmetries in Forward-Angle Elastic Electron-Proton Scattering

Abstract

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