RT Journal Article
T1 Determination of ππ scattering lengths from measurement of π+π− atom lifetime
A1 Adeva Andany, Bernardo
A1 Afanasyev, L.
A1 Benayoun, Maurice
A1 Benelli, Angela
A1 Berka, Z.
A1 Brekhovskikh, V.
A1 Caragheorgheopol, G.
A1 Čechák, Thomas
A1 Chiba, Masami
A1 Chliapnikov, P. V.
A1 Ciocarlan, C.
A1 Constantinescu, Serban
A1 Costantini, Silvia
A1 Curceanu (Petrascu), C.
A1 Doskarova, P.
A1 Dreossi, Diego
A1 Drijard, Daniel
A1 Dudarev, A.
A1 Ferro-Luzzi, Massi
A1 Fungueiriño Pazos, J. L.
A1 Gallas Torreira, María Mercedes
A1 Gómez Rodríguez, Faustino
A1 López Aguera, María de los Ángeles
A1 Núñez Pardo, T.
A1 Pazos, Antonio
A1 Pló Casasús, Máximo
A1 Molina Rodriguez, Juan
A1 Rodríguez Fernández, A.
A1 Saborido Silva, Juan José
A1 Santamarina Ríos, Cibrán
A1 Tobar Vidal, María José
A1 Vázquez Doce, Otón
A1 Zrelov, Petr V.
K1 DIRAC experiment
K1 Elementary atom
K1 Pionium atom
K1 Pion scattering
AB The DIRAC experiment at CERN has achieved a sizeable production of π π 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 ππ scattering length difference  |a0−a2| = (0.2533+0.0080−0.0078|stat+0.0078−0.0073|syst)M_pi−^{1} has been attained, providing an important test of Chiral Perturbation Theory
PB Elsevier
YR 2011
FD 2011-09-03
LK https://hdl.handle.net/10347/45014
UL https://hdl.handle.net/10347/45014
LA eng
NO B. Adeva, L. Afanasyev, M. Benayoun, A. Benelli, Z. Berka, V. Brekhovskikh, G. Caragheorgheopol, T. Cechak, M. Chiba, P.V. Chliapnikov, C. Ciocarlan, S. Constantinescu, S. Costantini, C. Curceanu (Petrascu), P. Doskarova, D. Dreossi, D. Drijard, A. Dudarev, M. Ferro-Luzzi, J.L. Fungueiriño Pazos, M. Gallas Torreira, J. Gerndt, P. Gianotti, D. Goldin, F. Gomez, A. Gorin, O. Gorchakov, C. Guaraldo, M. Gugiu, M. Hansroul, Z. Hons, R. Hosek, M. Iliescu, V. Karpukhin, J. Kluson, M. Kobayashi, P. Kokkas, V. Komarov, V. Kruglov, L. Kruglova, A. Kulikov, A. Kuptsov, K.I. Kuroda, A. Lamberto, A. Lanaro, V. Lapshin, R. Lednicky, P. Leruste, P. Levi Sandri, A. Lopez Aguera, V. Lucherini, T. Maki, I. Manuilov, J. Marin, J.L. Narjoux, L. Nemenov, M. Nikitin, T. Nunez Pardo, K. Okada, V. Olchevskii, A. Pazos, M. Pentia, A. Penzo, J.M. Perreau, M. Plo, T. Ponta, G.F. Rappazzo, A. Riazantsev, J.M. Rodriguez, A. Rodriguez Fernandez, A. Romero Vidal, V.M. Ronjin, V. Rykalin, J. Saborido, C. Santamarina, J. Schacher, C. Schuetz, A. Sidorov, J. Smolik, F. Takeutchi, A. Tarasov, L. Tauscher, M.J. Tobar, T. Trojek, S. Trusov, V. Utkin, O. Vázquez Doce, S. Vlachos, O. Voskresenskaya, T. Vrba, C. Willmott, V. Yazkov, Y. Yoshimura, M. Zhabitsky, P. Zrelov, Determination of ππ scattering lengths from measurement of π+π− atom lifetime, Physics Letters B, Volume 704, Issues 1–2, 2011, Pages 24-29, ISSN 0370-2693, https://doi.org/10.1016/j.physletb.2011.08.074
NO We are indebted to CERN for continuous support and the PS team for the excellent performance of the accelerator. We acknowledge the computing help from CESGA (Spain). This work was funded by CERN, INFN (Italy), INCITE and MICINN (Spain), IFIN-HH (Romania), the Ministry of Education and Science and RFBR grant 01-02-17756-a (Russia), the Grant-in-Aid from JSPS and Sentanken-grant from Kyoto Sangyo University (Japan)
DS Minerva
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