Determination of the number of light neutrino species from single photon production at LEP
A determination of the number of light neutrino families performed by measuring the cross section of single photon production in eqey collision near the Z resonance is reported. From an integrated luminosity of 100 pby1 , collected during the years 1991–94, we have observed 2091 single photon candid...
| Autores principales: | , |
|---|---|
| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1998
|
| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/74919 |
| Aporte de: |
| id |
I19-R120-10915-74919 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física light neutrino species photon LEP |
| spellingShingle |
Ciencias Exactas Física light neutrino species photon LEP Dova, María Teresa L3 Collaboration Determination of the number of light neutrino species from single photon production at LEP |
| topic_facet |
Ciencias Exactas Física light neutrino species photon LEP |
| description |
A determination of the number of light neutrino families performed by measuring the cross section of single photon production in eqey collision near the Z resonance is reported. From an integrated luminosity of 100 pby1 , collected during the years 1991–94, we have observed 2091 single photon candidates with an energy above 1 GeV in the polar angular region 458-u -1358. From a maximum likelihood fit to the single photon cross section, the Z decay width into invisible particles g is measured to be G s498"12 stat Ž . Ž. "12 sys MeV. Using the Standard Model couplings of neutrinos to the Z, the inv number of light neutrino species is determined to be N s2.98"0.07 stat Ž . Ž. "0.07 sys. |
| format |
Articulo Articulo |
| author |
Dova, María Teresa L3 Collaboration |
| author_facet |
Dova, María Teresa L3 Collaboration |
| author_sort |
Dova, María Teresa |
| title |
Determination of the number of light neutrino species from single photon production at LEP |
| title_short |
Determination of the number of light neutrino species from single photon production at LEP |
| title_full |
Determination of the number of light neutrino species from single photon production at LEP |
| title_fullStr |
Determination of the number of light neutrino species from single photon production at LEP |
| title_full_unstemmed |
Determination of the number of light neutrino species from single photon production at LEP |
| title_sort |
determination of the number of light neutrino species from single photon production at lep |
| publishDate |
1998 |
| url |
http://sedici.unlp.edu.ar/handle/10915/74919 |
| work_keys_str_mv |
AT dovamariateresa determinationofthenumberoflightneutrinospeciesfromsinglephotonproductionatlep AT l3collaboration determinationofthenumberoflightneutrinospeciesfromsinglephotonproductionatlep |
| bdutipo_str |
Repositorios |
| _version_ |
1764820484318298112 |