| dc.creator | Dova, María Teresa | |
| dc.creator | L3 Collaboration | |
| dc.date | 2001-05-17 | |
| dc.date | 2019-06-05T17:45:43Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/75889 | |
| dc.identifier | issn:0370-2693 | |
| dc.description | Using data collected with the L3 detector near the Z resonance, corresponding to an integrated luminosity of 150 pb−1, the branching fractions of the tau lepton into electron and muon are measured to be B(τ → eν ̄eντ ) = (17.806 ± 0.104 (stat.) ± 0.076 (syst.))%, B(τ → μν ̄μντ ) = (17.342±0.110 (stat.)±0.067 (syst.))%. From these results the ratio of the charged current coupling constants of the muon and the electron is determined to be gμ/ge = 1.0007 ± 0.0051. Assuming electron-muon universality, the Fermi constant is measured in tau lepton decays as GF = (1.1616± 0.0058) × 10−5 GeV−2. Furthermore, the coupling constant of the strong interaction at the tau mass scale is obtained as αs(m2 τ ) = 0.322 ± 0.009 (exp.) ± 0.015 (theory). | |
| dc.description | Facultad de Ciencias Exactas | |
| dc.format | application/pdf | |
| dc.format | 47-60 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Ciencias Exactas | |
| dc.subject | Física | |
| dc.subject | L3 detector | |
| dc.subject | tau lepton | |
| dc.subject | electron and muon | |
| dc.title | Measurement of the tau branching fractions into leptons | |
| dc.type | Articulo | |
| dc.type | Articulo | |
