Inclusive Σ<SUP>+</SUP> and Σ<SUP>0</SUP> production in hadronic Z decays

We report on measurements of the inclusive production rate of Σ+ and Σ0 baryons in hadronic Z decays collected with the L3 detector at LEP. The Σ+ baryons are detected through the decay Σ+→pπ0, while the Σ0 baryons are detected via the decay mode Σ0→Λγ. The average numbers of Σ+ and Σ0 per hadronic...

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Detalles Bibliográficos
Autores: Dova, María Teresa, L3 Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2000
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/75555
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/75555
Access Level:acceso abierto
Palabra clave:Ciencias Exactas
Física
production in hadronic Z decays
baryons
L3 detector at LEP
Descripción
Sumario:We report on measurements of the inclusive production rate of Σ+ and Σ0 baryons in hadronic Z decays collected with the L3 detector at LEP. The Σ+ baryons are detected through the decay Σ+→pπ0, while the Σ0 baryons are detected via the decay mode Σ0→Λγ. The average numbers of Σ+ and Σ0 per hadronic Z decay are measured to be: <math><mtext>N</mtext><msub><mi></mi><mn><mtext>Σ</mtext><msup><mi></mi><mn>+</mn></msup></mn></msub><mtext>+</mtext><mtext>N</mtext><msub><mi></mi><mn><mtext>Σ</mtext><mtext>̄</mtext><msup><mi></mi><mn>+</mn></msup></mn></msub><mtext>=0.114±0.011</mtext><msub><mi></mi><mn><mtext>stat</mtext></mn></msub><mtext>±0.009</mtext><msub><mi></mi><mn><mtext>syst</mtext></mn></msub></math> <math><mtext>N</mtext><msub><mi></mi><mn><mtext>Σ</mtext><msup><mi></mi><mn>0</mn></msup></mn></msub><mtext>+</mtext><mtext>N</mtext><msub><mi></mi><mn><mtext>Σ</mtext><mtext>̄</mtext><msup><mi></mi><mn>0</mn></msup></mn></msub><mtext>=0.095±0.015</mtext><msub><mi></mi><mn><mtext>stat</mtext></mn></msub><mtext>±0.013</mtext><msub><mi></mi><mn><mtext>syst</mtext></mn></msub><mspace sp="0.2" width="2px" linebreak="nobreak" is="true"></mspace><mtext>.</mtext></math> These rates are found to be higher than the predictions from Monte Carlo hadronization models and analytical parameterizations of strange baryon production.

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