Published January 16, 2014 | Version v1
Journal article Metadata-only

Beam-helicity asymmetry in associated electroproduction of real photons ep→eγπN in the Δ-resonance region

Creators

  • 1. DESY, 22603 Hamburg (Germany)
  • 2. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843 (United States)
  • 3. School of Physics, Peking University, Beijing 100871 (China)
  • 4. DESY, 15738 Zeuthen (Germany)
  • 5. Istituto Nazionale di Fisica Nucleare, Sezione di Bari, 70124 Bari (Italy)

Description

The beam-helicity asymmetry in associated electroproduction of real photons, ep→eγπN, in the Δ(1232)-resonance region is measured using the longitudinally polarized Hera positron beam and an unpolarized hydrogen target. Azimuthal Fourier amplitudes of this asymmetry are extracted separately for two channels, ep→eγπ0p and ep→eγπ+n, from a data set collected with a recoil detector. All asymmetry amplitudes are found to be consistent with zero

Availability note (English)

Available from http://dx.doi.org/10.1007/JHEP01(2014)077; Available from http://repo.scoap3.org/record/972

Additional details

Identifiers

URL
https://repo.scoap3.org/record/972;
DOI
10.1007/JHEP01(2014)077;
arXiv
arXiv:1210.8115v2;

Publishing Information

Journal Title
Journal of High Energy Physics (Online)
Journal Volume
2014
Journal Issue
01
Journal Page Range
p. 77
ISSN
1029-8479

INIS

Country of Publication
Germany
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
47036134
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ASYMMETRY; ELECTRON-PROTON INTERACTIONS; ELECTROPRODUCTION; HELICITY; HERA STORAGE RING; HYDROGEN; PHOTONS; PIONS; POSITRON BEAMS; QUANTUM CHROMODYNAMICS
Descriptors DEC
BASIC INTERACTIONS; BEAMS; BOSONS; ELECTROMAGNETIC INTERACTIONS; ELECTRON-NUCLEON INTERACTIONS; ELEMENTARY PARTICLES; ELEMENTS; FIELD THEORIES; HADRONS; INTERACTIONS; LEPTON BEAMS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; MASSLESS PARTICLES; MESONS; NONMETALS; PARTICLE BEAMS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; STORAGE RINGS

Optional Information

Copyright
Copyright (c) OPEN ACCESS, © The Authors
Notes
PUBLISHER-ID: JHEP01(2014)077; OAI: oai:repo.scoap3.org:972
Collaborations
HERMES Collaboration
Funding organization
SCOAP3, CERN, Geneva (Switzerland)