| Autor: |
J. May, F.W. Brasse, M. Merkwitz, J. Valentin, J.C. Alder, A. Courau, W. Flauger, W. Fehrenbach, K.H. Frank, E. Chazelas, E. Ganssenauge, V. Korbel, G. Tristram, J. Gayler |
| Rok vydání: |
1972 |
| Předmět: |
|
| Zdroj: |
Nuclear Physics B. 46:573-592 |
| ISSN: |
0550-3213 |
| DOI: |
10.1016/0550-3213(72)90087-9 |
| Popis: |
Recent measurements on electroproduction of π0 mesons in the region of the first pion nucleon resonance at four momentum transfers of q2 = 0.6 and q2 = 1 GeV are extended to q2 = 1.56 GeV2. All the results are discussed in terms of angular coefficients and multipole amplitudes. Assuming that the angular distributions are dominated by the magnetic dipole M1+, the square of the magnetic dipole amplitude and its interference terms with the multipoles E0+, S0+, E1+, S1+ and M1− are determined. The results are compared with theoretical models. The dependence of |M1+|2 on the invariant mass W at different q2 is discussed by comparison with a standard Breit Wigner formula. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
