| Autor: |
A. Sanchez Lorente, L. G. Tang, Anselm Esser, B. S. Schlimme, Sho Nagao, C. Rappold, S. Hirose, Concettina Sfienti, O. Borodina, T.R. Saito, M. Schoth, Hiroki Kanda, Osamu Hashimoto, Toshiyuki Gogami, M. Gómez Rodríguez, S. Sánchez Majos, U. Müller, C. Ayerbe Gayoso, V. Bozkurt, L. Debenjak, Ivica Friščić, M. O. Distler, Harald Merkel, Y. Fujii, Amur Margaryan, Michaela Thiel, Josef Pochodzalla, P. Bydžovský, Satoshi Nakamura, E. Kim, Simon Širca, R. Böhm, F. Schulz, Kyo Tsukada, Masashi Kaneta, Patrick Achenbach, Damir Bosnar, Joerg Reinhold |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Nuclear Physics A. 914:41-50 |
| ISSN: |
0375-9474 |
| DOI: |
10.1016/j.nuclphysa.2013.01.019 |
| Popis: |
The Mainz Microtron MAMI provides a continuous-wave unpolarized or spin-polarized electron beam with energies up to 1.6 GeV and high degrees of polarization. Electro-production of strange mesons is performed in the multi-spectrometer facility with the Kaos spectrometer for kaon detection and a high-resolution spectrometer for electron detection in plane or out of plane. Differential cross section measurements of exclusive p ( e , e ′ K + ) Λ , Σ 0 reactions at low four-momentum transfers in the nucleonʼs third resonance region have been done, followed by a measurement of the beam helicity asymmetry for p ( e → , e ′ K + ) Λ . These studies are important for the understanding of the effective coupling of photons to the hadrons and their resonances and electromagnetic form factors entering different effective Lagrangian models for photo- and electro-production of strangeness. The polarized structure function, extracted from the beam helicity asymmetry, shows an especially high sensitivity to model parameters. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect