| dc.creator | Dova, María Teresa | |
| dc.creator | L3 Collaboration | |
| dc.date | 2000-02-10 | |
| dc.date | 2019-07-15T17:26:21Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/78160 | |
| dc.identifier | issn:0370-2693 | |
| dc.description | The three different helicity states of W± bosons, produced in the reaction <math><mtext>e</mtext><msup><mi></mi><mn>+</mn></msup><mtext>e</mtext><msup><mi></mi><mn>−</mn></msup><mtext>→</mtext><mtext>W</mtext><msup><mi></mi><mn>+</mn></msup><mtext>W</mtext><msup><mi></mi><mn>−</mn></msup><mtext>→</mtext><mtext>ℓνq</mtext><mtext>q</mtext><mtext>̄</mtext></math> are studied using leptonic and hadronic W decays at √s = 183 GeV and 189 GeV. The W polarisation is also measured as a function of the scattering angle between the W- and the direction of the e- beam. The analysis demonstrates that W bosons are produced with all three helicities, the longitudinal and the two transverse states. Combining the results from the two center-of-mass energies and with leptonic and hadronic W decays, the fraction of longitudinally polarised W± bosons is measured to be 0.261 ± 0.051 (stat.) ± 0.016 (syst.) in agreement with the expectation from the Standard Model. | |
| dc.description | Facultad de Ciencias Exactas | |
| dc.format | application/pdf | |
| dc.format | 194-204 | |
| 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 | standar model | |
| dc.subject | W boson | |
| dc.subject | W polarisation | |
| dc.subject | W decay | |
| dc.title | Direct observation of longitudinally polarised W± bosons | |
| dc.type | Articulo | |
| dc.type | Articulo | |
