Limit on the tau neutrino mass

  • D. Cinabro
  • , S. Henderson
  • , K. Kinoshita
  • , T. Liu
  • , M. Saulnier
  • , R. Wilson
  • , H. Yamamoto
  • , A. J. Sadoff
  • , R. Ammar
  • , S. Ball
  • , P. Baringer
  • , D. Coppage
  • , N. Copty
  • , R. Davis
  • , N. Hancock
  • , M. Kelly
  • , N. Kwak
  • , H. Lam
  • , Y. Kubota
  • , M. Lattery
  • J. K. Nelson, S. Patton, D. Perticone, R. Poling, V. Savinov, S. Schrenk, R. Wang, M. S. Alam, I. J. Kim, B. Nemati, J. J. O'Neill, V. Romero, H. Severini, C. R. Sun, M. M. Zoeller, G. Crawford, R. Fulton, D. Fujino, K. K. Gan, H. Kagan, R. Kass, J. Lee, R. Malchow, F. Morrow, Y. Skovpen, M. Sung, C. White, J. Whitmore, P. Wilson, F. Butler

Research output: Contribution to journalArticlepeer-review

Abstract

A limit on the tau neutrino mass Mντ is obtained from a study of tau decays in the reaction e+e-→τ+τ- at center-of-mass energies ∼10.6 GeV. The result is based on an end-point analysis of the invariant mass spectrum of the decay products in the decay modes τ-→3h- 2h+ντ and τ-→2h-h+2π0ντ. The data sample used in this analysis contains 1.77×106 tau pairs, corresponding to an integrated luminosity of 1.92 fb-1, and is substantially larger than previous data samples used to place a limit on Mντ. The limit obtained for both five-hadron modes together is 32.6 MeV at 95% C.L.

Original languageEnglish (US)
Pages (from-to)3700-3704
Number of pages5
JournalPhysical review letters
Volume70
Issue number24
DOIs
StatePublished - 1993

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