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Matvienko, D. Santel, D. Semmler, D. \\v{C}ervenkov, D. Y. Kim, E. Kato, E. Nakano, E. Nedelkovska, E. Won, F. Simon, G. B. Mohanty, G. Bonvicini, G. Pakhlova, G. Schnell, G. Tatishvili, G. Varner, H. Aihara, H. Farhat, H. Hayashii, H. J. Kim, H. Kichimi, H. K. Park, H. Miyata, H. Park, H. Sahoo, I. Adachi, I. Jaegle, J. B. Kim, J. Dalseno, J. E. Fast, J.-G. Shiu, J. Haba, J. Libby, J. S. Lange, J. Yamaoka, K. Chilikin, K. Cho, K. E. Varvell, K. Hayasaka, K. Inami, K. Kinoshita, K. M. Williams, K. Senyo, K. Trabelsi, L. E. Piilonen, L. Santelj, M. Bra\\v{c}ko, M. J. Kim, M. Nakao, M. Nayak, M. N. Wagner, M. Petri\\v{c}, M. Ritter, M. R\\\"ohrken, M. Shapkin, M. Stari\\v{c}, M. Steder, M. Uchida, M. Watanabe, N. K. Nisar, O. Nitoh, O. Schneider, O. Seon, P. Kody\\v{s}, P. Kri\\v{z}an, P. Krokovny, P. Lukin, P. Vanhoefer, P. Wang, R. Chistov, R. Gillard, R. Itoh, R. Mizuk, R. Mussa, R. Pestotnik, S. Eidelman, S. E. Vahsen, S. Ganguly, S.-H. Lee, S. Korpar, S. L. Olsen, S. Nishida, S. Ogawa, S. Okuno, S. Ryu, S. Sandilya, S. Stani\\v{c}, S. Uehara, S. Uno, S. Yashchenko, T.-A. Shibata, T. E. Browder, T. Ferber, T. Hara, T. Iijima, T. Iwashita, T. Julius, T. K. Pedlar, T. Kuhr, T. Mori, T. Saito, T. Sanuki, T. Sumiyoshi, T. Tsuboyama, T. Uglov, U. Tamponi, V. Aulchenko, V. Chekelian, V. Chobanova, V. Gaur, V. Savinov, V. Shebalin, V. Vorobyev, V. Zhilich, W. Ostrowicz, W.-S. Hou, Y. Choi, Y. Hoshi, Y. J. Kim, Y.-J. Kwon, Y. M. Goh, Y. Nagasaka, Y. Sakai, Y.-S. Sohn, Y. Teramoto, Y. Unno, Y. Usov, Y. Watanabe, Y. Yamashita, Y. Yook, Z. Dole\\v{z}al, Z. P. Zhang","submitted_at":"2013-10-31T13:55:26Z","abstract_excerpt":"The lifetime of the $\\tau$-lepton is measured using the process $e^+e^-\\rightarrow\\tau^+\\tau^-$, where both $\\tau$-leptons decay to $3\\pi\\nu_\\tau$. The result for the mean lifetime, based on $711\\,\\mathrm{fb}^{-1}$ of data collected with the Belle detector at the $\\Upsilon(4S)$ resonance and $60\\,\\mathrm{MeV}$ below, is $\\tau = (290.17 \\pm 0.53(\\mathrm{stat.}) \\pm 0.33(\\mathrm{syst.}))\\cdot10^{-15}\\,\\mathrm{s}$. The first measurement of the lifetime difference between $\\tau^+$ and $\\tau^-$ is performed. 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