Determination of $\pi\pi$ scattering lengths from measurement of $\pi^+\pi^-$ atom lifetime

The DIRAC experiment at CERN has achieved a sizeable production of $\pi^+\pi^-$ atoms and has significantly improved the precision on its lifetime determination. From a sample of 21227 atomic pairs, a 4% measurement of the S-wave $\pi\pi$ scattering length difference $|a_0-a_2| = (.0.2533^{+0.0080}_...

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Detalles Bibliográficos
Autores principales: Adeva, B., Afanasyev, L., Benayoun, M., Benelli, A., Berka, Z., Brekhovskikh, V., Caragheorgheopol, G., Cechak, T., Chiba, M., Chliapnikov, P.V., Ciocarlan, C., Constantinescu, S., Costantini, S., Curceanu Petrascu, C., Doskarova, P., Dreossi, D., Drijard, D., Dudarev, A., Ferro-Luzzi, M., Fungueirino Pazos, J.L., Gallas Torreira, M., Gerndt, J., Gianotti, P., Goldin, D., Gomez, F., Gorin, A., Gorchakov, O., Guaraldo, C., Gugiu, M., Hansroul, M., Hons, Z., Hosek, R., Iliescu, M., Karpukhin, V., Kluson, J., Kobayashi, M., Kokkas, P., Komarov, V., Kruglov, V., Kruglova, L., Kulikov, A., Kuptsov, A., Kuroda, K.I., Lamberto, A., Lanaro, A., Lapshin, V., Lednicky, R., Leruste, P., Levi Sandri, P., Lopez Aguera, A., Lucherini, V., Maki, T., Manuilov, I., Marin, J., Narjoux, J.L., Nemenov, L., Nikitin, M., Nunez Pardo, T., Okada, K., Olchevsky, V., Pazos, A., Pentia, M., Penzo, A., Perreau, J.M., Plo, M., Ponta, T., Rappazzo, G.F., Riazantsev, A., Rodriguez, J.M., Rodriguez Fernandez, A., Romero Vidal, A., Ronjin, V.M., Rykalin, V., Saborido, J., Santamarina, C., Schacher, J., Schuetz, C., Sidorov, A., Smolik, J., Takeutchi, F., Tarasov, A., Tauscher, L., Tobar, M.J., Trojek, T., Trusov, S., Utkin, V., Vazquez Doce, O., Vlachos, S., Voskresenskaya, O., Vrba, T., Willmott, C., Yazkov, V., Yoshimura, Y., Zhabitsky, M., Zrelov, P.
Lenguaje:eng
Publicado: 2011
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2011.08.074
http://cds.cern.ch/record/1332520

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