Measurement of the e+e−→Zγγ cross section and determination of quartic gauge boson couplings at LEP

A first measurement of the cross section of the process e+e−→Zγγ is reported using a total integrated luminosity of 231 pby1 collected with the L3 detector at centre-of-mass energies of 182.7 GeV and 188.7 GeV. By selecting hadronic events with two isolated photons the eqeyTMZgg cross section is mea...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2000
Materias:
Ciencias Exactas
quartic gauge boson
LEP
L3 detector
Física
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/75656
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-75656
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
quartic gauge boson
LEP
L3 detector
Física
spellingShingle Ciencias Exactas
quartic gauge boson
LEP
L3 detector
Física
Dova, María Teresa
L3 Collaboration
Measurement of the e+e−→Zγγ cross section and determination of quartic gauge boson couplings at LEP
topic_facet Ciencias Exactas
quartic gauge boson
LEP
L3 detector
Física
description A first measurement of the cross section of the process e+e−→Zγγ is reported using a total integrated luminosity of 231 pby1 collected with the L3 detector at centre-of-mass energies of 182.7 GeV and 188.7 GeV. By selecting hadronic events with two isolated photons the eqeyTMZgg cross section is measured to be <math><mtext>0.49</mtext><msup><mi></mi><mn>+0.20</mn></msup><msub><mi></mi><mn>−0.17</mn></msub><mtext>±0.04</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>pb</mtext></math> at 182.7 GeV and <math><mtext>0.47±0.10±0.04</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>pb</mtext></math> at 188.7 GeV. The measurements are consistent with Standard Model expectations. Limits on Quartic Gauge Boson Couplings aa0/Λ2 and ac/Λ2 of <math><mtext>−0.009</mtext><mspace sp="0.3" width="2px" linebreak="nobreak" is="true"></mspace><mtext>GeV</mtext><msup><mi></mi><mn>−2</mn></msup><mtext>&lt;a</mtext><msub><mi></mi><mn>0</mn></msub><mtext>/Λ</mtext><msup><mi></mi><mn>2</mn></msup><mtext>&lt;0.008</mtext><mspace sp="0.3" width="2px" linebreak="nobreak" is="true"></mspace><mtext>GeV</mtext><msup><mi></mi><mn>−2</mn></msup></math> and <math><mtext>−0.007</mtext><mspace sp="0.3" width="2px" linebreak="nobreak" is="true"></mspace><mtext>GeV</mtext><msup><mi></mi><mn>−2</mn></msup><mtext>&lt;a</mtext><msub><mi></mi><mn>c</mn></msub><mtext>/Λ</mtext><msup><mi></mi><mn>2</mn></msup><mtext>&lt;0.013</mtext><mspace sp="0.3" width="2px" linebreak="nobreak" is="true"></mspace><mtext>GeV</mtext><msup><mi></mi><mn>−2</mn></msup></math> are derived at 95% confidence level.
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title Measurement of the e+e−→Zγγ cross section and determination of quartic gauge boson couplings at LEP
title_short Measurement of the e+e−→Zγγ cross section and determination of quartic gauge boson couplings at LEP
title_full Measurement of the e+e−→Zγγ cross section and determination of quartic gauge boson couplings at LEP
title_fullStr Measurement of the e+e−→Zγγ cross section and determination of quartic gauge boson couplings at LEP
title_full_unstemmed Measurement of the e+e−→Zγγ cross section and determination of quartic gauge boson couplings at LEP
title_sort measurement of the e+e−→zγγ cross section and determination of quartic gauge boson couplings at lep
publishDate 2000
url http://sedici.unlp.edu.ar/handle/10915/75656
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AT l3collaboration measurementoftheeezngcrosssectionanddeterminationofquarticgaugebosoncouplingsatlep
bdutipo_str Repositorios
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