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; A M Bakich; E Barberio; A Bay; I Bedny; U Bitenc; I Bizjak; S Blyth; A Bondar; A Bozek; M Bracko; T E Browder; M-C Chang; A Chen; K-F Chen; W T Chen; B G Cheon; R Chistov; Y Choi; Y K 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; J H Kang; P Kapusta; N Katayama; T Kawasaki; H R Khan; H Kichimi; Y J Kim; P Krizan; P Krokovny; R Kulasiri; R Kumar; C C Kuo; A Kuzmin; Y-J Kwon; J Lee; M J Lee; S E 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; S L Olsen; Y Onuki; H Ozaki; P Pakhlov; G Pakhlova; H Park; K S Park; R Pestotnik; L E Piilonen; A Poluektov; Y Sakai; N Satoyama; O Schneider; J Schümann; R Seidl; K Senyo; M E Sevior; H Shibuya; B Shwartz; J B Singh; A Somov; N Soni; S Stanic; M Staric; H Stoeck; S Y Suzuki; F Takasaki; K Tamai; M Tanaka; G N Taylor; Y Teramoto; X C 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; C H Wang; Y Watanabe; E Won; Q L Xie; B D Yabsley; A Yamaguchi; Y Yamashita; M Yamauchi; Z P Zhang; V Zhilich; V Zhulanov; A Zupanc; Belle Collaboration

doi:10.1103/PhysRevLett.99.011801

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

Phys Rev Lett. 2007 Jul 6;99(1):011801. doi: 10.1103/PhysRevLett.99.011801. Epub 2007 Jul 6.

Authors

K Belous¹, M Shapkin, A Sokolov, K Abe, K Abe, I Adachi, H Aihara, D Anipko, K Arinstein, V Aulchenko, T Aushev, A M Bakich, E Barberio, A Bay, I Bedny, U Bitenc, I Bizjak, S Blyth, A Bondar, A Bozek, M Bracko, T E Browder, M-C Chang, A Chen, K-F Chen, W T Chen, B G Cheon, R Chistov, Y Choi, Y K 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, J H Kang, P Kapusta, N Katayama, T Kawasaki, H R Khan, H Kichimi, Y J Kim, P Krizan, P Krokovny, R Kulasiri, R Kumar, C C Kuo, A Kuzmin, Y-J Kwon, J Lee, M J Lee, S E 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, S L Olsen, Y Onuki, H Ozaki, P Pakhlov, G Pakhlova, H Park, K S Park, R Pestotnik, L E Piilonen, A Poluektov, Y Sakai, N Satoyama, O Schneider, J Schümann, R Seidl, K Senyo, M E Sevior, H Shibuya, B Shwartz, J B Singh, A Somov, N Soni, S Stanic, M Staric, H Stoeck, S Y Suzuki, F Takasaki, K Tamai, M Tanaka, G N Taylor, Y Teramoto, X C 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, C H Wang, Y Watanabe, E Won, Q L Xie, B D Yabsley, A Yamaguchi, Y Yamashita, M Yamauchi, Z P Zhang, V Zhilich, V Zhulanov, A Zupanc; Belle Collaboration

Affiliation

¹ Institute of High Energy Physics, Protvino.

PMID: 17678147
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.