Heavy quarkonium production in Z decays

We report measurements of the inclusive production of heavy quarkonium states in Z decays based on the analysis of 3.6 million hadronic events collected by the L3 detector at LEP. The measurement of inclusive J production and an improved 95% confidence level upper limit on Υ production are presented...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, Lacentre, Pablo E., L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 1999
Materias:
Ciencias Exactas
Física
quarkonium production
Z decays
L3 detector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/78058
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-78058
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
quarkonium production
Z decays
L3 detector
spellingShingle Ciencias Exactas
Física
quarkonium production
Z decays
L3 detector
Dova, María Teresa
Lacentre, Pablo E.
L3 Collaboration
Heavy quarkonium production in Z decays
topic_facet Ciencias Exactas
Física
quarkonium production
Z decays
L3 detector
description We report measurements of the inclusive production of heavy quarkonium states in Z decays based on the analysis of 3.6 million hadronic events collected by the L3 detector at LEP. The measurement of inclusive J production and an improved 95% confidence level upper limit on Υ production are presented. In addition, two independent measurements of the ratio, fp , of prompt J mesons to those from B decay are made using two different isolation cuts to separate prompt J mesons from J mesons produced in the decays of b hadrons. The results are: <math><mtext>Br</mtext><mtext>(</mtext><mtext>Z</mtext><mtext>→</mtext><mtext>J</mtext><mtext>+</mtext><mtext>X</mtext><mtext>)=(3.21±0.21</mtext><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat.)</mtext><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><msup><mi></mi><mn>+0.19</mn></msup><msub><mi></mi><mn>−0.28</mn></msub><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(sys.)</mtext><mtext>)×10</mtext><msup><mi></mi><mn>−3</mn></msup></math>, Br(Z→ϒ(1S)+X)<4.4×10−5, <math><mtext>f</mtext><msub><mi></mi><mn><mtext>p</mtext></mn></msub><mtext>=(7.1±2.1</mtext><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat.)</mtext><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><mtext>±1.2</mtext><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(sys.)</mtext><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><msup><mi></mi><mn>+1.5</mn></msup><msub><mi></mi><mn>−0.8</mn></msub><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(theo.)</mtext><mtext>)×10</mtext><msup><mi></mi><mn>−2</mn></msup></math>.
format Articulo
Articulo
author Dova, María Teresa
Lacentre, Pablo E.
L3 Collaboration
author_facet Dova, María Teresa
Lacentre, Pablo E.
L3 Collaboration
author_sort Dova, María Teresa
title Heavy quarkonium production in Z decays
title_short Heavy quarkonium production in Z decays
title_full Heavy quarkonium production in Z decays
title_fullStr Heavy quarkonium production in Z decays
title_full_unstemmed Heavy quarkonium production in Z decays
title_sort heavy quarkonium production in z decays
publishDate 1999
url http://sedici.unlp.edu.ar/handle/10915/78058
work_keys_str_mv AT dovamariateresa heavyquarkoniumproductioninzdecays
AT lacentrepabloe heavyquarkoniumproductioninzdecays
AT l3collaboration heavyquarkoniumproductioninzdecays
bdutipo_str Repositorios
_version_ 1764820485330173953

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