Search for the electric dipole moment of the τ lepton

K. Inami, K. Abe, K. Abe, R. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, P. K. Behera, I. Bizjak, A. Bondar, T. E. Browder, P. ChangY. Chao, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, L. Y. Dong, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, C. Hagner, F. Handa, T. Hara, H. Hayashii, M. Hazumi, I. Higuchi, T. Higuchi, T. Hokuue, Y. Hoshi, W. S. Hou, H. C. Huang, T. Igaki, T. Iijima, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, H. O. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, S. Korpar, P. Krokovny, R. Kulasiri, A. Kuzmin, Y. J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, D. Liventsev, R. S. Lu, J. Macnaughton, F. Mandl, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, H. Miyake, H. Miyata, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, S. Nishida, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Park, K. S. Park, L. S. Peak, J. P. Perroud, L. E. Piilonen, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, O. Schneider, S. Semenov, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starǐ, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, Y. Watanabe, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, Y. Yusa, Z. P. Zhang, V. Zhilich, D. Žontar

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

We have searched for a CP violation signature arising from an electric dipole moment (dτ) of the τ lepton in the e+e- → τ+τ- reaction. Using an optimal observable method and 29.5 fb-1 of data collected with the Belle detector at the KEKB collider at √s= 10.58 GeV, we find Re(dτ) = (1.15 ± 1.70) × 10-17 ecm and Im(dτ) = (-0.83 ± 0.86) × 10-17 ecm and set the 95% confidence level limits -2.2 x 10-17 < Re(dτ) < 4.5 × 10-17 ecm and -2.5 x 10-17 < Im(dτ) < 0.8 x 10-17 ecm.

Original languageEnglish
Pages (from-to)16-26
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume551
Issue number1-2
DOIs
Publication statusPublished - Jan 2 2003
Externally publishedYes

Keywords

  • CP violation
  • Electric dipole moment
  • Optimal observable
  • Tau

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Inami, K., Abe, K., Abe, K., Abe, R., Abe, T., Adachi, I., Aihara, H., Akatsu, M., Asano, Y., Aso, T., Aulchenko, V., Aushev, T., Bakich, A. M., Ban, Y., Banas, E., Behera, P. K., Bizjak, I., Bondar, A., Browder, T. E., ... Žontar, D. (2003). Search for the electric dipole moment of the τ lepton. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 551(1-2), 16-26. https://doi.org/10.1016/S0370-2693(02)02984-2