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Afanasyev, L. Kruglova, L. Nemenov, L. Tauscher, M. Chiba, M. Gugiu, M. Hansroul, M. Kobayashi, M. Nikitin, M. Pentia, M. Plo, M. Zhabitsky, O. Gorchakov, P. Chliapnikov, P. Federicova, P. Prusa, P. Zrelov, R. Lednicky, S. Aogaki, S. Horikawa, S. Trusov, T. Cechak, T. Trojek, T. Urban, T. Vrba, V. Brekhovskikh, V. Karpukhin, V. Kruglov, V. Olchevskii, V. Rykalin, V. Yazkov, Y. Allkofer, Y. Iwashita, Y. Yoshimura, Z. Hons","submitted_at":"2017-07-07T14:02:40Z","abstract_excerpt":"After having announced the statistically significant observation (5.6~$\\sigma$) of the new exotic $\\pi K$ atom, the DIRAC experiment at the CERN proton synchrotron presents the measurement of the corresponding atom lifetime, based on the full $\\pi K$ data sample: $\\tau = (5.5^{+5.0}_{-2.8}) \\cdot 10^{-15}s$. 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Anania, A. Benelli, A. Dudarev, A. Gorin, A. Kulikov, A. Kuptsov, A. Lamberto, A. Lanaro, A. Penzo, A. Romero Vidal, A. Ryazantsev, A. Sidorov, C. Amsler, C. Guaraldo, C. Marinas, D. Drijard, D. Dumitriu, D. Fluerasu, DIRAC Collaboration: B. Adeva, E. Kulish, F. Takeutchi, G. Rappazzo, J. Kluson, J. Martincik, J. Saborido, J. Schacher, J. Smolik, K. Gritsay, K. Okada, L. Afanasyev, L. Kruglova, L. Nemenov, L. Tauscher, M. Chiba, M. Gugiu, M. Hansroul, M. Kobayashi, M. Nikitin, M. Pentia, M. Plo, M. Zhabitsky, O. Gorchakov, P. Chliapnikov, P. Federicova, P. Prusa, P. Zrelov, R. Lednicky, S. Aogaki, S. Horikawa, S. Trusov, T. Cechak, T. Trojek, T. Urban, T. Vrba, V. Brekhovskikh, V. Karpukhin, V. Kruglov, V. Olchevskii, V. Rykalin, V. Yazkov, Y. Allkofer, Y. Iwashita, Y. Yoshimura, Z. 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