Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 47: Hadronenstruktur und -spektroskopie

HK 47.8: Talk

Thursday, March 20, 2014, 18:45–19:00, HZ 1+2

Radiative corrections to charged pion-pair production — •Stefan Petschauer and Norbert Kaiser — Physik-Department, Technische Universität München, James-Franck-Straße 1, D-85747 Garching

We calculate the one-photon loop radiative corrections to the charged pion-pair production process π⁻γ→π⁺π⁻π⁻. In the low-energy region this reaction is governed by the chiral pion-pion interaction. Electromagnetic counterterms are included in order to remove the ultraviolet divergences generated by the photon-loops. Infrared finiteness of the virtual radiative corrections is achieved by including soft photon radiation below an energy cut-off. The purely electromagnetic interaction of the charged pions mediated by one-photon exchange is also taken into account. We present radiative corrections to the total cross sections as well as to the mass spectra. One finds that the effects are of the order of a few percent.

This work has been supported in part by DFG and NSFC (CRC110).