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

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.

11 pages, 7 figures, 1 table

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Cited by in corpus (8)

• Modeling interactions of photons with pseudoscalar and vector mesons
• The hadronic light-by-light contribution to the muon's anomalous magnetic moment
• Measurement of the ${\pi }^0$ electromagnetic transition form factor slope
• Spacelike and timelike form factors for the $({\pi }^0,\eta ,{\eta }^{\prime })\to {\gamma }^{\ast }\gamma$ transitions in the light-front quark model
• Improved Standard-Model prediction for ${\pi }^0\to e^{+}{e}^{-}$
• Chiral anomaly and the pion properties in the light-front quark model
• The doubly virtual $({\pi }^0,\eta ,{\eta }^{\prime })\to {\gamma }^{\ast }{\gamma }^{\ast }$ transition form factors in the light-front quark model
• New high-statistics measurement of the ${\pi }^0\to e^{+}{e}^{-}\gamma$ Dalitz decay at the Mainz Microtron