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Belous, K; Shapkin, M; Aihara, H; Asner, D M; Aulchenko, V; Bakich, A M; Bala, A; Bhuyan, B; Bobrov, A; Bondar, A; Bračko, M; Chekelian, V; Cheon, B G; Chilikin, K; Chistov, R; Cho, K; Chobanova, V; Choi, Y; Cinabro, D; Doležal, Z; Dutta, D; Eidelman, S; Epifanov, D; Ferber, T; Gaur, V; Ganguly, S; Gillard, R; Haba, J; Hoshi, Y; Iijima, T; Kichimi, H; Kiesling, C; Kim, D Y; Kim, J B; Kim, Y J; Kinoshita, K; Korpar, S; Križan, P; Krokovny, P; Kuzmin, A; Kwon, Y-J; Lee, S-H; Libby, J; Liventsev, D; Lukin, P; Miyata, H; Mizuk, R; Mohanty, G B; Mori, T; Mussa, R; Nakano, E; Nakao, M; Nayak, M; Ng, C; Nisar, N K; Nitoh, O; Pakhlova, G; Park, C W; Park, H; Park, H K; Pedlar, T K; Pestotnik, R; Piilonen, L E; Ritter, M; Rostomyan, A; Sahoo, H; Saito, T; Santel, D; Santelj, L; Sanuki, T; Schneider, O; Semmler, D; Shen, C P; Shwartz, B; Sohn, Y-S; Stanič, S; Starič, M; Steder, M; Tamponi, U; Tatishvili, G; Teramoto, Y; Trabelsi, K; Tsuboyama, T; Unno, Y; Usov, Y; Vahsen, S E; Vanhoefer, P; Varvell, K E; Vorobyev, V; Wagner, M N; Wang, C H; Wang, P; Watanabe, M; Williams, K M; Won, E; Yamaoka, J; Yamashita, Y; Yashchenko, S; Zhang, Z P; Zhilich, V
Physical review letters, 01/2014, Letnik: 112, Številka: 3Journal Article
The lifetime of the τ lepton is measured using the process e+ e- → τ+ τ- , where both τ leptons decay to 3πν(τ). The result for the mean lifetime, based on 711 fb(-1) of data collected with the Belle detector at the ϒ(4S) resonance and 60 MeV below, is τ=(290.17±0.53(stat)±0.33(syst))×10(-15) 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<7.0×10(-3) at 90% C.L.
