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Measurements of theτmass and the mass difference of theτ+andτ−atBABAR
- Source :
- Physical Review D. 80
- Publication Year :
- 2009
- Publisher :
- American Physical Society (APS), 2009.
-
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(-).
Details
- ISSN :
- 15502368 and 15507998
- Volume :
- 80
- Database :
- OpenAIRE
- Journal :
- Physical Review D
- Accession number :
- edsair.doi...........79ce049e16e5c5ddfcbe2cd5dbd425ea