EPJ Web Conf.
Volume 134, 2017Subnuclear Structure of Matter: Achievements and Challenges
|Number of page(s)||5|
|Published online||26 January 2017|
Magnetic Moments of Excited Baryons
II. Physikalisches Institut, Universität Gießen, Heinrich Buff Ring 16 35392, Gießen
Published online: 26 January 2017
In project A.3, the reaction γ p → π0γ’p has been studied using the TAPS photon spectrometer in the energy range √s= 1221-1331 MeV. Energy tagged photon beams have been produced with the Glasgow tagging spectrometer from electron beams provided by the MAMI-B accelerator. Angle and energy differential cross sections have been measured and compared to theoretical calculations. This comparison allows the magnetic moment of the Δ+ isobar to be extracted for the first time to μΔ+ = [2.7+1.3−1.0(stat)±1.5(syst)±3(theo)] μN. In an extension of the A3 project to the meson sector, the time-like transition form factor of the η meson has been measured with the Crystal Ball/TAPS detector system at MAMI-C.
© The Authors, published by EDP Sciences, 2017
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