Separation of σL and σT in η electroproduction at the resonance S11 (1535)

Autor: C. Gössling, M. Merkwitz, V. Gerhardt, J. Gayler, W. Flauger, S.P. Goel, H. Wriedt, R. Haidan, F.W. Brasse, D. Poeck
Rok vydání: 1978
Předmět:
Zdroj: Nuclear Physics B. 139:37-44
ISSN: 0550-3213
DOI: 10.1016/0550-3213(78)90177-3
Popis: The ratio R = σ L σ T of longitudinal and transverse cross sections for the reaction ep → ep η at the resonance S 11 (1535) was measured at momentum transfers q 2 = 0.6 and 1 GeV 2 . The transverse part dominates the longitudinal part of the cross-section. Averaging from W = 1.49 GeV to W = 1.58 GeV we obtain R = 0.22±0.23 at q 2 = 0.6 GeV 2 and R = −0.16 ± 0.16 at q 2 = 1 GeV 2 .
Databáze: OpenAIRE