Measurements of the tau mass and the mass difference of the tau(+) and tau(-) at BABAR
. (2009) Measurements of the tau mass and the mass difference of the tau(+) and tau(-) at BABAR. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.80 (No.9). article no. v. ISSN 1550-7998 Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevD.80.092005
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(-).
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