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 ep → 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 ep → 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)

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