Neutral-current four-fermion production in e<sup>+</sup>e<sup>−</sup> interactions at LEP
Neutral-current four-fermion production, e<sup>+</sup>e<sup>-</sup> → f ̄f f' ̄ f', is studied in 0.7 fb<sup>−1</sup> of data collected with the L3 detector at LEP at centre-of-mass energies √s = 183–209 GeV. Four final states are considered: q ̄qν ̄ν, q...
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| Autores principales: | , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2005
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/79452 |
| Aporte de: |
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I19-R120-10915-79452 |
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dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física L3 detector fermiones Electromagnetismo |
| spellingShingle |
Ciencias Exactas Física L3 detector fermiones Electromagnetismo Dova, María Teresa L3 Collaboration Neutral-current four-fermion production in e<sup>+</sup>e<sup>−</sup> interactions at LEP |
| topic_facet |
Ciencias Exactas Física L3 detector fermiones Electromagnetismo |
| description |
Neutral-current four-fermion production, e<sup>+</sup>e<sup>-</sup> → f ̄f f' ̄ f', is studied in 0.7 fb<sup>−1</sup> of data collected with the L3 detector at LEP at centre-of-mass energies √s = 183–209 GeV. Four final states are considered: q ̄qν ̄ν, q ̄qℓ<sup>+</sup>ℓ<sup>-</sup>, ℓ<sup>+</sup>ℓ<sup>-</sup>ℓ'<sup>+</sup>ℓ'<sup>-</sup> and ℓ<sup>+</sup>ℓ<sup>-</sup>ν ̄ν, where ℓ denotes either an electron or a muon. Their cross sections are measured and found to agree with the Standard Model predictions. In addition, the e<sup>+</sup>e<sup>-</sup> → Zγ <sup>∗</sup> → f ̄f f' ̄ f' process is studied and its total cross section at the average centre- of-mass energy (√s) = 196.6 GeV is found to be 0.29 ± 0.05 ± 0.03 pb, where the first uncertainty is statistical and the second systematic, in agreement with the Standard Model prediction of 0.22 pb. Finally, the mass spectra of the qq ̄ℓ<sup>+</sup>ℓ<sup>-</sup> final states are analysed to search for the possible production of a new neutral heavy particle, for which no evidence is found. |
| format |
Articulo Articulo |
| author |
Dova, María Teresa L3 Collaboration |
| author_facet |
Dova, María Teresa L3 Collaboration |
| author_sort |
Dova, María Teresa |
| title |
Neutral-current four-fermion production in e<sup>+</sup>e<sup>−</sup> interactions at LEP |
| title_short |
Neutral-current four-fermion production in e<sup>+</sup>e<sup>−</sup> interactions at LEP |
| title_full |
Neutral-current four-fermion production in e<sup>+</sup>e<sup>−</sup> interactions at LEP |
| title_fullStr |
Neutral-current four-fermion production in e<sup>+</sup>e<sup>−</sup> interactions at LEP |
| title_full_unstemmed |
Neutral-current four-fermion production in e<sup>+</sup>e<sup>−</sup> interactions at LEP |
| title_sort |
neutral-current four-fermion production in e<sup>+</sup>e<sup>−</sup> interactions at lep |
| publishDate |
2005 |
| url |
http://sedici.unlp.edu.ar/handle/10915/79452 |
| work_keys_str_mv |
AT dovamariateresa neutralcurrentfourfermionproductioninesupsupesupsupinteractionsatlep AT l3collaboration neutralcurrentfourfermionproductioninesupsupesupsupinteractionsatlep |
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Repositorios |
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1764820486765674499 |