Measurement of the pi(0) -> e(+) e(-) gamma Dalitz decay at the Mainz Microtron

A2 Collaboration MAMI, P. Adlarson*, F. Afzal, P. Aguar-Bartolome, Z. Ahmed, C. S. Akondi, J. R. M. Annand, H. J. Arends, K. Bantawa, R. Beck, H. Berghaeuser, M. Biroth, N. S. Borisov, A. Braghieri, W. J. Briscoe, S. Cherepnya, F. Cividini, C. Collicott, S. Costanza, A. DenigM. Dieterle, E. J. Downie, P. Drexler, M. I. Ferretti Bondy, L. V. Fil'kov, S. Gardner, S. Garni, D. I. Glazier, D. Glowa, W. Gradl, G. M. Gurevich, D. J. Hamilton, D. Hornidge, G. M. Huber, T. C. Jude, A. Kaeser, V. L. Kashevarov, S. Kay, I. Keshelashvili, R. Kondratiev, M. Korolija, B. Krusche, V. V. Kulikov, A. Lazarev, J. Linturi, V. Lisin, K. Livingston, C. Mullen, M. H. Sikora, D. P. Watts, L. A. Zana

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The Dalitz decay pi(0) -> e(+) e(-) gamma has been measured in the gamma p -> pi(0) p reaction with the A2 tagged-photon facility at the Mainz Microtron, MAMI. The value obtained for the slope parameter of the pi(0) electromagnetic transition form factor, a(pi) = 0.030 +/- 0.010(tot), is in agreement with existing measurements of this decay and with recent theoretical calculations. The uncertainty obtained in the value of a(pi) is lower than in previous results based on the pi(0) -> e(+) e(-) gamma decay.

Original languageEnglish
Article number025202
Number of pages10
JournalPhysical Review C
Volume95
Issue number2
DOIs
Publication statusPublished - 9 Feb 2017

Keywords

  • TAGGED PHOTON SPECTROMETER
  • TRANSITION FORM-FACTOR
  • DISPERSIVE ANALYSIS
  • DARK PHOTON
  • MAMI-B
  • MESONS
  • SEARCH
  • TAPS
  • PI-0

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