This item is non-discoverable
Loading...
Non-discoverable
Target and beam-target spin asymmetries in exclusive pion electroproduction for Q2>1 GeV2. I. ep→eπ+n
Bosted, PE Amaryan, MJ Anefalos Pereira, S Avakian, H Badui, RA Ball, J Baltzell, NA Battaglieri, M Batourine, V Bedlinskiy, I
Bosted, PE
Amaryan, MJ
Anefalos Pereira, S
Avakian, H
Badui, RA
Ball, J
Baltzell, NA
Battaglieri, M
Batourine, V
Bedlinskiy, I
Citations
Altmetric:
Genre
Pre-print
Date
2017-03-20
Advisor
Committee member
Group
Department
Permanent link to this record
Collections
Research Projects
Organizational Units
Journal Issue
DOI
10.1103/PhysRevC.95.035206
Abstract
© 2017 American Physical Society. Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive π+ electroproduction reaction γ∗p→nπ+. The results were obtained from scattering of 6-GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Laboratory. The kinematic range covered is 1.1<W<3 GeV and 1<Q2<6GeV2. Results were obtained for about 6000 bins in W, Q2, cos(θ∗), and φ∗. Except at forward angles, very large target-spin asymmetries are observed over the entire W region. Reasonable agreement is found with phenomenological fits to previous data for W<1.6 GeV, but very large differences are seen at higher values of W. A generalized parton distributions (GPD)-based model is in poor agreement with the data. When combined with cross-sectional measurements, the present results provide powerful constraints on nucleon resonance amplitudes at moderate and large values of Q2, for resonances with masses as high as 2.4 GeV.
Description
Citation
Citation to related work
American Physical Society (APS)
Has part
Physical Review C
ADA compliance
For Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu