Measurement of the average lifetime of b-hadrons in Z decays
- Autores
- Dova, María Teresa; L3 Collaboration
- Año de publicación
- 1998
- Idioma
- español castellano
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present a measurement of the average b-hadron lifetime t at the eqey collider LEP. Using hadronic Z decays b collected in the period from 1991 to 1994, two independent analyses have been performed. In the first one, the b-decay position is reconstructed as a secondary vertex of hadronic b-decay particles. The second analysis is an updated measurement of t using the impact parameter of leptons with high momentum and high transverse momentum. The combined result is In addition, we measure the average charged b-decay multiplicity 〈nb〉and the normalized average b-energy 〈xE〉b at LEP to be
Facultad de Ciencias Exactas - Materia
-
Ciencias Exactas
Física
b-hadron lifetime
colider LEP
Z decays - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/77896
Ver los metadatos del registro completo
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Measurement of the average lifetime of b-hadrons in Z decaysDova, María TeresaL3 CollaborationCiencias ExactasFísicab-hadron lifetimecolider LEPZ decaysWe present a measurement of the average b-hadron lifetime t at the eqey collider LEP. Using hadronic Z decays b collected in the period from 1991 to 1994, two independent analyses have been performed. In the first one, the b-decay position is reconstructed as a secondary vertex of hadronic b-decay particles. The second analysis is an updated measurement of t using the impact parameter of leptons with high momentum and high transverse momentum. The combined result is <math><mtext>τ</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>=[1549±9</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat)</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>±15</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(syst)]</mtext><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><mtext>fs</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>.</mtext></math> In addition, we measure the average charged b-decay multiplicity 〈nb〉and the normalized average b-energy 〈xE〉b at LEP to be <math><mtext>〈n</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>〉=4.90±0.04</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat)±0.11</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(syst),</mtext><mspace sp="1" width="2px" linebreak="nobreak" is="true"></mspace><mtext>〈x</mtext><msub><mi></mi><mn>E</mn></msub><mtext>〉</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>=0.709±0.004</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat+syst).</mtext></math>Facultad de Ciencias Exactas1998-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf220-232http://sedici.unlp.edu.ar/handle/10915/77896spainfo:eu-repo/semantics/altIdentifier/issn/0370-2693info:eu-repo/semantics/altIdentifier/doi/10.1016/S0370-2693(97)01379-8info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:53:19Zoai:sedici.unlp.edu.ar:10915/77896Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:53:19.388SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Measurement of the average lifetime of b-hadrons in Z decays |
| title |
Measurement of the average lifetime of b-hadrons in Z decays |
| spellingShingle |
Measurement of the average lifetime of b-hadrons in Z decays Dova, María Teresa Ciencias Exactas Física b-hadron lifetime colider LEP Z decays |
| title_short |
Measurement of the average lifetime of b-hadrons in Z decays |
| title_full |
Measurement of the average lifetime of b-hadrons in Z decays |
| title_fullStr |
Measurement of the average lifetime of b-hadrons in Z decays |
| title_full_unstemmed |
Measurement of the average lifetime of b-hadrons in Z decays |
| title_sort |
Measurement of the average lifetime of b-hadrons in Z decays |
| dc.creator.none.fl_str_mv |
Dova, María Teresa L3 Collaboration |
| author |
Dova, María Teresa |
| author_facet |
Dova, María Teresa L3 Collaboration |
| author_role |
author |
| author2 |
L3 Collaboration |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Física b-hadron lifetime colider LEP Z decays |
| topic |
Ciencias Exactas Física b-hadron lifetime colider LEP Z decays |
| dc.description.none.fl_txt_mv |
We present a measurement of the average b-hadron lifetime t at the eqey collider LEP. Using hadronic Z decays b collected in the period from 1991 to 1994, two independent analyses have been performed. In the first one, the b-decay position is reconstructed as a secondary vertex of hadronic b-decay particles. The second analysis is an updated measurement of t using the impact parameter of leptons with high momentum and high transverse momentum. The combined result is <math><mtext>τ</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>=[1549±9</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat)</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>±15</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(syst)]</mtext><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><mtext>fs</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>.</mtext></math> In addition, we measure the average charged b-decay multiplicity 〈nb〉and the normalized average b-energy 〈xE〉b at LEP to be <math><mtext>〈n</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>〉=4.90±0.04</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat)±0.11</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(syst),</mtext><mspace sp="1" width="2px" linebreak="nobreak" is="true"></mspace><mtext>〈x</mtext><msub><mi></mi><mn>E</mn></msub><mtext>〉</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>=0.709±0.004</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat+syst).</mtext></math> Facultad de Ciencias Exactas |
| description |
We present a measurement of the average b-hadron lifetime t at the eqey collider LEP. Using hadronic Z decays b collected in the period from 1991 to 1994, two independent analyses have been performed. In the first one, the b-decay position is reconstructed as a secondary vertex of hadronic b-decay particles. The second analysis is an updated measurement of t using the impact parameter of leptons with high momentum and high transverse momentum. The combined result is <math><mtext>τ</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>=[1549±9</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat)</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>±15</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(syst)]</mtext><mspace sp="0.4" width="2px" linebreak="nobreak" is="true"></mspace><mtext>fs</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>.</mtext></math> In addition, we measure the average charged b-decay multiplicity 〈nb〉and the normalized average b-energy 〈xE〉b at LEP to be <math><mtext>〈n</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>〉=4.90±0.04</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat)±0.11</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(syst),</mtext><mspace sp="1" width="2px" linebreak="nobreak" is="true"></mspace><mtext>〈x</mtext><msub><mi></mi><mn>E</mn></msub><mtext>〉</mtext><msub><mi></mi><mn><mtext>b</mtext></mn></msub><mtext>=0.709±0.004</mtext><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>(stat+syst).</mtext></math> |
| publishDate |
1998 |
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1998-01-01 |
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