Published January 1999
| Version v1
Journal article
Electroproduction of the Δ(1232) Resonance at High Momentum Transfer
Creators
- Frolov, V.V.1
- Adams, G.S.1
- Davidson, R.M.1
- Klusman, M.1
- Mukhopadhyay, N.C.1
- Napolitano, J.1
- Nozar, M.1
- Price, J.W.1
- Stoler, P.1
- Witkowski, M.1
- Bosted, P.2
- Armstrong, C.S.3
- Meekins, D.3
- Assamagan, K.4
- Avery, S.4
- Baker, O.K.4
- Eden, T.4
- Gaskell, D.4
- Gueye, P.4
- Hinton, W.4
- Keppel, C.4
- Madey, R.4
- Niculescu, G.4
- Niculescu, I.4
- Tang, L.4
- Ahmidouch, A.5
- Madey, R.5
- Kim, W.6
- Baker, O.K.7
- Burkert, V.7
- Carlini, R.7
- Dunne, J.7
- Ent, R.7
- Keppel, C.7
- Mack, D.7
- Mitchell, J.7
- Tang, L.7
- Wood, S.7
- Koltenuk, D.8
- Minehart, R.9
- Mkrtchyan, H.10
- Tadevosian, V.10
- 1. Physics Department, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States)
- 2. Physics Department, American University, Washington, D.C. 20016 (United States)
- 3. Department of Physics, College of William Mary, Williamsburg, Virginia 23187 (United States)
- 4. Physics Department, Hampton University, Hampton, Virginia 23668 (United States)
- 5. Physics Department, Kent State University, Kent, Ohio 44242 (United States)
- 6. Physics Department, Kyungpook National University, Taegu, South (Korea, Republic of)
- 7. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)
- 8. Physics Department, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
- 9. Physics Department, University of Virginia, Charlottesville, Virginia 22903 (United States)
- 10. Yerevan Physics Institute, Yerevan (Armenia)
Description
We studied the electroproduction of the Δ(1232) resonance via the reaction p(e,e'p)π0 at four-momentum transfers Q2=2.8 and 4.0 GeV2 . This is the highest Q2 for which exclusive resonance electroproduction has ever been observed. Decay angular distributions for Δ→pπ0 were measured over a wide range of barycentric energies covering the resonance. The N - Δ transition form factor G*M and ratios of resonant multipoles E1+/M1+ and S1+/M1+ were extracted from the decay angular distributions. These ratios remain small, indicating that perturbative QCD is not applicable for this reaction at these momentum transfers. copyright 1998 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 82
- Journal Issue
- 1
- Journal Page Range
- p. 45-48
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 30010875
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- DELTA BARYONS; DELTA-1232 BARYONS; ELECTRON-PROTON INTERACTIONS; ELECTROPRODUCTION; LINEAR MOMENTUM; MOMENTUM TRANSFER; PIONS NEUTRAL; QUANTUM CHROMODYNAMICS; RESONANCE PARTICLES
- Descriptors DEC
- BARYONS; BASIC INTERACTIONS; BOSONS; DELTA BARYONS; ELECTROMAGNETIC INTERACTIONS; ELECTRON-NUCLEON INTERACTIONS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; HADRONS; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; MESONS; N*BARYONS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PIONS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY