Target and beam-target spin asymmetries in exclusive π + and π − electroproduction with 1.6- to 5.7-GeV electrons

Abstract : Beam-target double spin asymmetries and target single-spin asymmetries in exclusive $\pi^+$ and $\pi^-$ electroproduction were obtained from scattering of 1.6 to 5.7 GeV longitudinally polarized electrons from longitudinally polarized protons (for $\pi^+$) and deuterons (for $\pi^-$) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. The kinematic range covered is $1.11.5$ GeV. Very large target-spin asymmetries are observed for $W>1.6$ GeV. When combined with cross section measurements, the present results will provide powerful constraints on nucleon resonance amplitudes at moderate and large values of $Q^2$, for resonances with masses as high as 2.3 GeV.

http://hal.in2p3.fr/in2p3-01332574
Contributor : Sophie Heurteau <>
Submitted on : Thursday, June 16, 2016 - 11:03:58 AM
Last modification on : Monday, February 10, 2020 - 6:12:46 PM

Citation

E. Bosted, S. Biselli, S. Careccia, G. Dodge, R. Fersch, et al.. Target and beam-target spin asymmetries in exclusive π + and π − electroproduction with 1.6- to 5.7-GeV electrons. Physical Review C, American Physical Society, 2016, 94 (5), pp.055201. ⟨10.1103/PhysRevC.94.055201⟩. ⟨in2p3-01332574⟩

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