https://doi.org/10.1140/epjc/s10052-017-4816-7
Regular Article - Theoretical Physics
Photon radiation in 
hadrons at low energies with carlomat_3.1
1
Deutsches Elektronen–Synchrotron (DESY), Platanenallee 6, 15738, Zeuthen, Germany
2
Humboldt–Universität zu Berlin, Institut für Physik, Newtonstrasse 15, 12489, Berlin, Germany
3
Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40007, Katowice, Poland
* e-mail: karol.kolodziej@us.edu.pl
Received:
11
January
2017
Accepted:
7
April
2017
Published online:
20
April
2017
We present a sample of results for the cross sections of several processes of low energetic 
annihilation into final states containing pions accompanied by one or two photons, or a light lepton pair. The results, which have been obtained with a new version of a multipurpose Monte Carlo program carlomat, labelled 3.1, demonstrate new capabilities of the program which, among others, include a possibility of taking into account either the initial or final state radiation separately, or both at a time, and a possibility of inclusion of the electromagnetic charged pion form factor for processes with charged pion pairs. We also discuss some problems related to the U(1) electromagnetic gauge invariance.
© The Author(s), 2017
