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, Null; 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.; Molokanova, N.; Movchan, S.; Potrebenikov, Y. U.; Shkarovskiy, S.; Zinchenko, A.; Rubin, P.; Baldini, W.; Cotta Ramusino, A.; Dalpiaz, P.; Fiorini, M.; Gianoli, A.; Norton, A.; Petrucci, F.; Savriã©, 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.; Retiãre, F.. - 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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