Measurement of the tau lepton mass and an upper limit on the mass difference between tau( ) and tau(-)

K Belous; M Shapkin; A Sokolov; K Abe; K Abe; I Adachi; H Aihara; D Anipko; K Arinstein; V Aulchenko; T Aushev; AM Bakich; E Barberio; A Bay; I Bedny; U Bitenc; I Bizjak; S Blyth; A Bondar; A Bozek; M Bracko; TE Browder; M-C Chang; A Chen; K-F Chen; WT Chen; BG Cheon; R Chistov; Y Choi; YK Choi; S Cole; J Dalseno; A Drutskoy; S Eidelman; D Epifanov; S Fratina; M Fujikawa; N Gabyshev; T Gershon; G Gokhroo; B Golob; H Ha; J Haba; Y Hasegawa; K Hayasaka; H Hayashii; M Hazumi; D Heffernan; T Hokuue; Y Hoshi; S Hou; W-S Hou; T Iijima; K Ikado; A Imoto; K Inami; A Ishikawa; R Itoh; M Iwasaki; Y Iwasaki; H Kaji; JH Kang; P Kapusta; N Katayama; T Kawasaki; HR Khan; H Kichimi; YJ Kim; P Krizan; P Krokovny; R Kulasiri; R Kumar; CC Kuo; A Kuzmin; Y-J Kwon; J Lee; MJ Lee; SE Lee; T Lesiak; S-W Lin; D Liventsev; G Majumder; F Mandl; T Matsumoto; A Matyja; S McOnie; H Miyake; H Miyata; Y Miyazaki; R Mizuk; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; S Nishida; O Nitoh; S Ogawa; T Ohshima; S Okuno; SL Olsen; Y Onuki; H Ozaki; P Pakhlov; G Pakhlova; H Park; KS Park; R Pestotnik; LE Piilonen; A Poluektov; Y Sakai; N Satoyama; O Schneider; J Schuemann; R Seidl; K Senyo; ME Sevior; H Shibuya; B Shwartz; B Singh; A Somov; N Soni; S Stanic; M Staric; H Stoeck; SY Suzuki; F Takasaki; K Tamai; M Tanaka; GN Taylor; Y Teramoto; XC Tian; I Tikhomirov; K Trabelsi; T Tsuboyama; T Tsukamoto; S Uehara; T Uglov; K Ueno; S Uno; P Urquijo; Y Usov; G Varner; S Villa; A Vinokurova; CH Wang; Y Watanabe; E Won; QL Xie; BD Yabsley; A Yamaguchi; Y Yamashita; M Yamauchi; ZP Zhang; V Zhilich; V Zhulanov; A Zupanc

Journal article

Measurement of the tau lepton mass and an upper limit on the mass difference between tau( ) and tau(-)

K Belous, M Shapkin, A Sokolov, K Abe, K Abe, I Adachi, H Aihara, D Anipko, K Arinstein, V Aulchenko, T Aushev, AM Bakich, E Barberio, A Bay, I Bedny, U Bitenc, I Bizjak, S Blyth, A Bondar, A Bozek Show all

PHYSICAL REVIEW LETTERS | AMERICAN PHYSICAL SOC | Published : 2007

DOI: 10.1103/PhysRevLett.99.011801

Abstract

The mass of the tau lepton has been measured in the decay mode tau-->3pinutau using a pseudomass technique. The result obtained from 414 fb-1 of data collected with the Belle detector is Mtau=[1776.61+/-0.13(stat)+/-0.35(sys)] MeV/c2. The upper limit on the relative mass difference between positive and negative tau leptons is |Mtau+-Mtau-|/Mtau<2.8 x 10-4 at 90% confidence level.