The NA62 experiment collected a large sample of charged kaon decays in 2007 with a highly efficient trigger for decays into electrons. A measurement of the pi(0) electromagnetic transition form factor slope parameter from 1.11 x 10(6) fully reconstructed K-+/- -> pi(+/-) pi(0)(D) , pi(0)(D) -> e(+) e(-) gamma events is reported. The measured value a = (3.68 +/- 0.57) x 10(-2) is in good agreement with theoretical expectations and previous measurements and represents the most precise experimental determination of the slope in the time-like momentum transfer region.
Measurement of the Ï 0 electromagnetic transition form factor slope / Lazzeroni, C., Lurkin, N., Romano, A., The Na62 Collaboration, N., Blazek, T., Ceccucci, A., Danielsson, H., Falaleev, V., Gatignon, L., Goy Lopez, S., Hallgren, B., Maier, A., Peters, A., Piccini, M., Riedler, P., Frabetti, P.L., Gersabeck, E., Kekelidze, V., Madigozhin, D., Misheva, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 768:(2017), pp. 38-45. [10.1016/j.physletb.2017.02.042]
Measurement of the Ï0 electromagnetic transition form factor slope
IACOPINI, ENRICO;Lenti, M.;
2017
Abstract
The NA62 experiment collected a large sample of charged kaon decays in 2007 with a highly efficient trigger for decays into electrons. A measurement of the pi(0) electromagnetic transition form factor slope parameter from 1.11 x 10(6) fully reconstructed K-+/- -> pi(+/-) pi(0)(D) , pi(0)(D) -> e(+) e(-) gamma events is reported. The measured value a = (3.68 +/- 0.57) x 10(-2) is in good agreement with theoretical expectations and previous measurements and represents the most precise experimental determination of the slope in the time-like momentum transfer region.
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