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T: Fachverband Teilchenphysik

T 39: Eingeladene Vorträge 1

T 39.5: Eingeladener Vortrag

Dienstag, 10. März 2015, 15:45–16:15, M.10.12 (HS 14)

Transition form factors and distribution amplitudes of pseudoscalar mesons — •Nils Offen — Institute for theoretical physics, University of Regensburg

Hard exclusive processes are dominated by wave functions at small transverse separation, the so called distribution amplitudes. The π→γ and η^(′)→γ transitions constitute gold plated modes to extract or at least constrain these distribution amplitudes.

Experimental data from the Belle and Babar collaboration in recent years has given rise to a flurry of theoretical activity, debating if the theoretical uncertainties in hadronic hard exclusive reactions are under control.

I will present recent calculations at next to leading order including SU(3) flavour violation and anomalous contributions. A comparison with experimental data and a discussion of occurring theoretical issues will be given.