Measurement of the $\pi^0$ electromagnetic transition form factor slope

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 $1.11\times10^{6}$ fully reconstructed $K^\pm \to \pi^\pm \pi^0_D, \; \pi^...

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Detalles Bibliográficos
Autores principales: Lazzeroni, C., Lurkin, N., Romano, A., Blazek, T., Koval, M., 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., Molokanova, N., Movchan, S., Potrebenikov, Yu., Shkarovskiy, S., Zinchenko, A., Rubin, P., Baldini, W., Cotta Ramusino, A., Dalpiaz, P., Fiorini, M., Gianoli, A., Norton, A., Petrucci, F., Savrié, M., Wahl, H., Bizzeti, A., Bucci, F., Iacopini, E., Lenti, M., Veltri, M., Antonelli, A., Moulson, M., Raggi, M., Spadaro, T., Eppard, K., Hita-Hochgesand, M., Kleinknecht, K., Renk, B., Wanke, R., Winhart, A., Winston, R., Bolotov, V., Duk, V., Gushchin, E., Ambrosino, F., Di Filippo, D., Massarotti, P., Napolitano, M., Palladino, V., Saracino, G., Anzivino, G., Imbergamo, E., Piandani, R., Sergi, A., Cenci, P., Pepe, M., Costantini, F., Doble, N., Giudici, S., Pierazzini, G., Sozzi, M., Venditti, S., Balev, S., Collazuol, G., DiLella, L., Gallorini, S., Goudzovski, E., Lamanna, G., Mannelli, I., Ruggiero, G., Cerri, C., Fantechi, R., Kholodenko, S., Kurshetsov, V., Obraztsov, V., Semenov, V., Yushchenko, O., D'Agostini, G., Leonardi, E., Serra, M., Valente, P., Fucci, A., Salamon, A., Bloch-Devaux, B., Peyaud, B., Engelfried, J., Coward, D., Kozhuharov, V., Litov, L., Arcidiacono, R., Bifani, S., Biino, C., Dellacasa, G., Marchetto, F., Numao, T., Retière, F.
Lenguaje:eng
Publicado: 2016
Materias:
Particle Physics - Experiment
hep-ex
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2017.02.042
http://cds.cern.ch/record/2228265
Descripción
Sumario: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 $1.11\times10^{6}$ fully reconstructed $K^\pm \to \pi^\pm \pi^0_D, \; \pi^0_D \to e^+ e^- \, \gamma$ events is reported. The measured value $a = \left(3.68 \pm 0.57\right)\times 10^{-2}$ 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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