Inclusive charm production in two-photon collisions at LEP

The cross section of charm production in γγ collisions <math><mtext>σ(e</mtext><msup><mi></mi><mn>+</mn></msup><mtext>e</mtext><msup><mi></mi><mn>−</mn></msup><mtext>→e</mtext><msup&g...

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Detalhes bibliográficos
Autores: Dova, María Teresa, Lacentre, Pablo E., L3 Collaboration
Formato: artículo
Estado:Versión publicada
Fecha de publicación:1999
País:Argentina
Recursos:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/78057
Acesso em linha:http://sedici.unlp.edu.ar/handle/10915/78057
Access Level:acceso abierto
Palavra-chave:Ciencias Exactas
Física
two-photon collision
L3 detector
semileptonic decays
Descrição
Resumo:The cross section of charm production in γγ collisions <math><mtext>σ(e</mtext><msup><mi></mi><mn>+</mn></msup><mtext>e</mtext><msup><mi></mi><mn>−</mn></msup><mtext>→e</mtext><msup><mi></mi><mn>+</mn></msup><mtext>e</mtext><msup><mi></mi><mn>−</mn></msup><mtext>c</mtext><mtext>c</mtext><mtext>̄</mtext><mtext>X)</mtext></math> is measured at LEP with the L3 detector at centre-of-mass energies from 91 GeV to 183 GeV. Charmed hadrons are identified by electrons and muons from semileptonic decays. The direct process <math><mtext>γγ→c</mtext><mtext>c</mtext><mtext>̄</mtext></math> is found to be insufficient to describe the data. The measured cross section values and event distributions require contributions from resolved processes, which are sensitive to the gluon density in the photon.