Measurements of the tau Mass and Mass Difference of the tau^+ and tau^- at BABAR
Journal Article
·
· Phys.Rev.D80:092005,2009
OSTI ID:968505
The authors present the result of a precision measurement of the mass of the {tau} lepton, M{sub {tau}}, based on 423 fb{sup -1} of data recorded at the {Upsilon}(4S) resonance with the BABAR detector. Using a pseudomass endpoint method, they determine the mass to be 1776.68 {+-} 0.12(stat) {+-} 0.41(syst) MeV. They also measure the mass difference between the {tau}{sup +} and {tau}{sup -}, and obtain (M{sub {tau}{sup +}} - M{sub {tau}{sup -}})/M{sub AVG}{sup {tau}} = (-3.4 {+-} 1.3(stat) {+-} 0.3(syst)) x 10{sup -4}, where M{sub AVG}{sup {tau}} is the average value of M{sub {tau}{sup +}} and M{sub {tau}{sup -}}.
- Research Organization:
- Stanford Linear Accelerator Center (SLAC)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 968505
- Report Number(s):
- SLAC-PUB-13791; arXiv:0909.3562
- Journal Information:
- Phys.Rev.D80:092005,2009, Journal Name: Phys.Rev.D80:092005,2009
- Country of Publication:
- United States
- Language:
- English
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