Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Hadron Structure and Spectroscopy 3
HK 18.2: Vortrag
Montag, 23. März 2015, 17:30–17:45, T/SR19
Eperimental access to Transition Distribution Amplitudes with the PANDA experiment at FAIR — •Manuel Zambrana1,2, María Carmen Mora Espí2, Frank Maas1,2,3, Heybat Ahmadi2, Samer Ahmed1,2, Luigi Capozza2, Alaa Dbeyssi2, Malte Deiseroth1,2, Bertold Fröhlich1,2, Dmitry Khaneft1,2, Dexu Lin1,2, Cristina Morales2, Oliver Noll1,2, David Rodríguez Piñeiro2, Roserio Valente1,2, and Iris Zimmermann1,2 — 1Institut für Kernphysik, Johannes Gutenberg Universität, Mainz, Germany — 2Helmholtz-Institut Mainz, Germany — 3Prisma Cluster of Excellence, Mainz, Germany
We address the feasibility of accessing proton to pion Transition Distribution Amplitudes with the future PANDA detector at the FAIR facility. Assuming a factorized cross section, feasibility studies of measuring pp → e+e−π0 with PANDA have been performed at the center of mass energy squared s = 5 GeV2 and s=10 GeV2, in the kinematic region of four-momentum transfer 3.0 < q2 < 4.3 GeV2 and 5 < q2 < 9 GeV2, respectively, with a neutral pion scattered in the forward or backward cone |cosθπ0|> 0.5 in the pp center of mass frame. These include detailed simulations on signal reconstruction efficiency, rejection of the most severe background channel, i.e. pp → π+π−π0, and the feasibility of the measurement using a sample of 2 fb−1 of integrated luminosity. The “measured” cross sections with the simulations are used to test QCD factorization at the leading order by measuring scaling laws and fitting angular distributions.