Year: 2004
Type: article
Abstract: The goal of the DIRAC experiment at CERN is to measure with high precision the lifetime of the $π^+π^-$ atom ($A_{2π}$), which is of order $3\times10^{-15}$ s, and thus to determine the s-wave $ππ$-scattering lengths difference $|a_{0}-a_{2}|$. $A_{2π}$ atoms are detected through the characteristic features of $π^+π^-$ pairs from the atom break-up (ionization) in the target. We report on a first high statistics atomic data sample obtained from p Ni interactions at 24 GeV/$c$ proton momentum and present the methods to separate the signal from the background.
Authors: B Adeva, L Afanasyev, M Benayoun, A Benelli, Z Berka, V Brekhovskikh, G Caragheorgheopol, T Cechak, M Chiba, S Constantinescu, S Costantini, 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, N Kalinina, 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
Institutions: Universidade de Santiago de Compostela, Joint Institute for Nuclear Research, Centre National de la Recherche Scientifique, University of Basel, Czech Technical University in Prague, Institute for High Energy Physics, Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, Tokyo Metropolitan University, University of Bern, European Organization for Nuclear Research, University of Trieste, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, University of Ioannina, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, High Energy Accelerator Research Organization, Lomonosov Moscow State University, FZU - Institute of Physics of the Czech Academy of Sciences, Kyoto Sangyo University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, CERN, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Grantová Agentura České Republiky, Russian Foundation for Basic Research, Joint Institute for Nuclear Research, Xunta de Galicia, Istituto Nazionale di Fisica Nucleare, University of Ioannina, Japan Society for the Promotion of Science, Institut National de Physique Nucléaire et de Physique des Particules
Awards: Test of non-perturbative QCD by means of the measurement of Kπ scattering length -Extension of DIRAC experiment-, Lifetime measurement of pi^+pi^- atoms to test low energy QCD predictions, A Test of QCD at Low Energy by measuring a Lifetime of Di-mesonic Atoms, A test of QCD by measuring a life-time of hadoronic atoms., Test of QCD by means of the measurement of the pion scattering length, G5145095339, A double pulse separator for a lifetime measurement of pionic atoms., Measurement of the scattering length of pions and the test of QCD, A test of QCD at low energy
OpenAlex ID: W972166173