Measurement of the π0→e+e-γ Dalitz decay at the Mainz Microtron

Authors :: Adlarson, P.
Afzal, F.
Aguar-Bartolomé, P.
Ahmed, Z.
Akondi, C. S.
Annand, J. R.M.
Arends, H. J.
Bantawa, K.
Beck, R.
Berghäuser, H.
Biroth, M.
Borisov, N. S.
Braghieri, A.
Briscoe, W. J.
Cherepnya, S.
Cividini, F.
Collicott, C.
Costanza, S.
Denig, A.
Dieterle, M.
Downie, E. J.
Drexler, P.
Ferretti Bondy, M. I.
Fil'Kov, L. V.
Gardner, S.
Garni, S.
Glazier, D. I.
Glowa, D.
Gradl, W.
Gurevich, G. M.
Hamilton, D. J.
Hornidge, D.
Huber, G. M.
Jude, T. C.
Käser, A.
Kashevarov, V. L.
Kay, S.
Keshelashvili, I.
Kondratiev, R.
Korolija, M.
Krusche, B.
Kulikov, V. V.
Lazarev, A.
Linturi, J.
Lisin, V.
Livingston, K.
Macgregor, I. J.D.
Macrae, R.
Watts, D. P.
Werthmüller, Dominik
Publication Year :: 2017
Abstract: The Dalitz decay π0→e+e-γ has been measured in the γp→π0p reaction with the A2 tagged-photon facility at the Mainz Microtron, MAMI. The value obtained for the slope parameter of the π0 electromagnetic transition form factor, aπ=0.030±0.010tot, is in agreement with existing measurements of this decay and with recent theoretical calculations. The uncertainty obtained in the value of aπ is lower than in previous results based on the π0→e+e-γ decay.

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