Measurements of the τ mass and the mass difference of the τ + and τ - at BABAR
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Gershon,Paul Fraser Harrison,J. Ilic,T. E. Latham,G. B. Mohanty,E. M.T. Puccio,H. R. Band,X. R. Chen,Sridhara Dasu,K. T. Flood,Y. B. Pan,R. Prepost,C. O. Vuosalo,S. L. Wu +491 more
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In this paper, the authors measured the mass of the tau lepton, M-tau, based on data recorded at the Upsilon(4S) resonance with the BABAR detector and determined the mass to be 1776.68 +/- 0.41 MeV.Abstract:
We present the result from a precision measurement of the mass of the tau lepton, M-tau, based on 423 fb(-1) of data recorded at the Upsilon(4S) resonance with the BABAR detector. Using a pseudomass endpoint method, we determine the mass to be 1776.68 +/- 0.12(stat)+/- 0.41(syst) MeV. We also measure the mass difference between the tau(+) and tau(-), and obtain (M-tau(+)-M-tau(-))/M-AVG(tau)=(-3.4 +/- 1.3(stat)+/- 0.3(syst))x10(-4), where M-AVG(tau) is the average value of M-tau(+) and M-tau(-).read more
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Physics achievements from the Belle experiment
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