RT Journal Article
T1 First measurement of the pi+pi- atom lifetime
A1 Romero Vidal, Antonio
A1 Santamarina Ríos, Cibrán
A1 Saborido Silva, Juan José
A1 Adeva Andany, Bernardo
A1 Gómez Rodríguez, Faustino
A1 López Aguera, María de los Ángeles
A1 Pló Casasús, Máximo
A1 Vázquez Regueiro, Pablo
A1 DIRAC Collaboration, 
AB The goal of the DIRAC experiment at CERN (PS212) is to measure the π+π− atom lifetime with 10% precision. Such a measurement would yield a precision of 5% on the value of the S-wave ππ scattering lengths combination |a0 − a2|. Based on part of the collected data we present a first result on the lifetime, τ = [2.91+0.49 −0.62] × 10−15 s, and discuss the major systematic errors. This lifetime corresponds to |a0 − a2| = 0.264+0.033 −0.020m−1 π .
PB Elsevier
SN 0370-2693
YR 2005
FD 2005-07-14
LK https://hdl.handle.net/10347/39244
UL https://hdl.handle.net/10347/39244
LA eng
NO B. Adeva, L. Afanasyev, M. Benayoun, A. Benelli, Z. Berka, V. Brekhovskikh, G. Caragheorgheopol, T. Cechak, M. Chiba, S. Constantinescu, C. Detraz, D. Dreossi, D. Drijard, A. Dudarev, I. Evangelou, M. Ferro-Luzzi, M.V. Gallas, J. Gerndt, R. Giacomich, P. Gianotti, D. Goldin, F. Gómez, A. Gorin, O. Gorchakov, C. Guaraldo, M. Hansroul, R. Hosek, M. Iliescu, V. Karpukhin, J. Kluson, M. Kobayashi, P. Kokkas, V. Komarov, V. Kruglov, L. Kruglova, A. Kulikov, A. Kuptsov, I. Kurochkin, K.-I. Kuroda, A. Lamberto, A. Lanaro, V. Lapshin, R. Lednicky, P. Leruste, P. Levi Sandri, A. Lopez Aguera, V. Lucherini, T. Maki, N. Manthos, I. Manuilov, L. Montanet, J.-L. Narjoux, L. Nemenov, M. Nikitin, T. Núñez Pardo, K. Okada, V. Olchevskii, A. Pazos, M. Pentia, A. Penzo, J.-M. Perreau, C. Petrascu, M. Pló, T. Ponta, D. Pop, G.F. Rappazzo, A. Rodriguez Fernandez, A. Romero, A. Ryazantsev, V. Rykalin, C. Santamarina, J. Saborido, J. Schacher, Ch.P. Schuetz, A. Sidorov, J. Smolik, F. Takeutchi, A. Tarasov, L. Tauscher, M.J. Tobar, S. Trusov, V. Utkin, O. Vázquez Doce, P. Vázquez, S. Vlachos, V. Yazkov, Y. Yoshimura, M. Zhabitsky, P. Zrelov, First measurement of the π+π− atom lifetime, Physics Letters B, Volume 619, Issues 1–2, 2005, Pages 50-60, ISSN 0370-2693, https://doi.org/10.1016/j.physletb.2005.05.045.
DS Minerva
RD 27 abr 2026