Measurement of the $τ$-lepton lifetime at Belle
Creators: name: Belle Collaboration
name: Belous, K.
name: Shapkin, M.
name: Sokolov, A.
name: Adachi, I.
name: Aihara, H.
name: Asner, D. M.
name: Aulchenko, V.
name: Bakich, A. M.
name: Bala, A.
name: Bhuyan, B.
name: Bobrov, A.
name: Bondar, A.
name: Bonvicini, G.
name: Bozek, A.
name: Bračko, M.
name: Browder, T. E.
name: Červenkov, D.
name: Chekelian, V.
name: Chen, A.
name: Cheon, B. G.
name: Chilikin, K.
name: Chistov, R.
name: Cho, K.
name: Chobanova, V.
name: Choi, Y.
name: Cinabro, D.
name: Dalseno, J.
name: Doležal, Z.
name: Dutta, D.
name: Eidelman, S.
name: Epifanov, D.
name: Farhat, H.
name: Fast, J. E.
name: Ferber, T.
name: Gaur, V.
name: Ganguly, S.
name: Garmash, A.
name: Gillard, R.
name: Goh, Y. M.
name: Golob, B.
name: Haba, J.
name: Hara, T.
name: Hayasaka, K.
name: Hayashii, H.
name: Hoshi, Y.
name: Hou, W. -S.
name: Iijima, T.
name: Inami, K.
name: Ishikawa, A.
name: Itoh, R.
name: Iwashita, T.
name: Jaegle, I.
name: Julius, T.
name: Kato, E.
name: Kichimi, H.
name: Kiesling, C.
name: Kim, D. Y.
name: Kim, H. J.
name: Kim, J. B.
name: Kim, M. J.
name: Kim, Y. J.
name: Kinoshita, K.
name: Ko, B. R.
name: Kodyš, P.
name: Korpar, S.
name: Križan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kuzmin, A.
name: Kwon, Y. -J.
name: Lange, J. S.
name: Lee, S. -H.
name: Libby, J.
name: Liventsev, D.
name: Lukin, P.
name: Matvienko, D.
name: Miyata, H.
name: Mizuk, R.
name: Mohanty, G. B.
name: Mori, T.
name: Mussa, R.
name: Nagasaka, Y.
name: Nakano, E.
name: Nakao, M.
name: Nayak, M.
name: Nedelkovska, E.
name: Ng, C.
name: Nisar, N. K.
name: Nishida, S.
name: Nitoh, O.
name: Ogawa, S.
name: Okuno, S.
name: Olsen, S. L.
name: Ostrowicz, W.
name: Pakhlova, G.
name: Park, C. W.
name: Park, H.
name: Park, H. K.
name: Pedlar, T. K.
name: Pestotnik, R.
name: Petrič, M.
name: Piilonen, L. E.
name: Ritter, M.
name: Röhrken, M.
name: Rostomyan, A.
name: Ryu, S.
name: Sahoo, H.
name: Saito, T.
name: Sakai, Y.
name: Sandilya, S.
name: Santel, D.
name: Santelj, L.
name: Sanuki, T.
name: Savinov, V.
name: Schneider, O.
name: Schnell, G.
name: Schwanda, C.
name: Semmler, D.
name: Senyo, K.
name: Seon, O.
name: Shebalin, V.
name: Shen, C. P.
name: Shibata, T. -A.
name: Shiu, J. -G.
name: Shwartz, B.
name: Sibidanov, A.
name: Simon, F.
name: Sohn, Y. -S.
name: Stanič, S.
name: Starič, M.
name: Steder, M.
name: Sumiyoshi, T.
name: Tamponi, U.
name: Tatishvili, G.
name: Teramoto, Y.
name: Trabelsi, K.
name: Tsuboyama, T.
name: Uchida, M.
name: Uehara, S.
name: Uglov, T.
name: Unno, Y.
name: Uno, S.
name: Usov, Y.
name: Vahsen, S. E.
name: Van Hulse, C.
name: Vanhoefer, P.
name: Varner, G.
name: Varvell, K. E.
name: Vinokurova, A.
name: Vorobyev, V.
name: Wagner, M. N.
name: Wang, C. H.
name: Wang, P.
name: Watanabe, M.
name: Watanabe, Y.
name: Williams, K. M.
name: Won, E.
name: Yamaoka, J.
name: Yamashita, Y.
name: Yashchenko, S.
name: Yook, Y.
name: Yuan, C. Z.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zupanc, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The lifetime of the $τ$-lepton is measured using the process $e^+e^-\rightarrowτ^+τ^-$, where both $τ$-leptons decay to $3πν_τ$. The result for the mean lifetime, based on $711\,\mathrm{fb}^{-1}$ of data collected with the Belle detector at the $Υ(4S)$ resonance and $60\,\mathrm{MeV}$ below, is $τ= (290.17 \pm 0.53(\mathrm{stat.}) \pm 0.33(\mathrm{syst.}))\cdot10^{-15}\,\mathrm{s}$. The first measurement of the lifetime difference between $τ^+$ and $τ^-$ is performed. The upper limit on the relative lifetime difference between positive and negative $τ$-leptons is $|Δτ| / τ&lt; 7.0 \times 10^{-3}$ at 90% CL.
description: 17 pages, 4 figures. Submitted to Phys. Rev. Lett