First Measurement of the Double Spin Asymmetry in ^→e^→p → e ‘π⁺ in the Resonance Region

Authors

G. E. Dodge, Old Dominion UniversityFollow
K. V. Dharmawardane, Old Dominion University
T. A. Forest, Old Dominion University
C. E. Hyde-Wright, Old Dominion UniversityFollow
A. Klein, Old Dominion University
S. E. Kuhn, Old Dominion UniversityFollow
R. A. Niyazov, Old Dominion University
L. B. Weinstein, Old Dominion UniversityFollow
J. Yun, Old Dominion University
et. al.
CLAS Collaboration

Document Type

Article

Publication Date

2002

DOI

10.1103/PhysRevLett.88.082001

Publication Title

Physical Review Letters

Volume

88

Issue

8

Pages

1-6

Abstract

The double spin asymmetry in the ^→e^→p → e' π⁺n reaction has been measured for the first time in the resonance region for four-momentum transfer Q² = 0.35-1.5 GeV². Data were taken at Jefferson Lab with the CLAS detector using a 2.6 GeV polarized electron beam incident on a polarized solid NH₃ target. Comparison with predictions of phenomenological models shows strong sensitivity to resonance contributions. Helicity-1/2 transitions are found to be dominant in the second and third resonance regions. The measured asymmetry is consistent with a faster rise with Q² of the helicity asymmetry A₁ for the F₁₅(1680) resonance than expected from the analysis of the unpolarized data.

Comments

© 2002 American Physical Society

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Publisher's version available at: https://doi.org/10.1103/PhysRevLett.88.082001

Original Publication Citation

De Vita, R., Dodge, G.E., Hyde-Wright, C.E., Kuhn, S.E., Weinstein, L.B., Zhou, Z., et al., CLAS Collaboration (2002). First measurement of the double spin asymmetry in ^→e^→p → e ‘π⁺ in the resonance region. Physical Review Letters, 88(8), 1-6, Article 082001. https://doi.org/10.1103/PhysRevLett.88.082001

ORCID

0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde-Wright), 0000-0003-2243-6836 (Kuhn), 0000-0001-5416-2900 (Weinstein)

Repository Citation

Dodge, G. E.; Dharmawardane, K. V.; Forest, T. A.; Hyde-Wright, C. E.; Klein, A.; Kuhn, S. E.; Niyazov, R. A.; Weinstein, L. B.; Yun, J.; et. al.; and CLAS Collaboration, "First Measurement of the Double Spin Asymmetry in ^→e^→p → e ‘π⁺ in the Resonance Region" (2002). Physics Faculty Publications. 503.
https://digitalcommons.odu.edu/physics_fac_pubs/503