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Search for promptly produced heavy quarkonium states in hadronic Z decays

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Search for promptly produced heavy quarkonium states in hadronic Z decays

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dc.contributor.author	DELPHI Collaboration
dc.contributor.author	Alemany Fernández, Reyes
dc.contributor.author	Cabrera Urbán, Susana
dc.contributor.author	Castillo Giménez, María Victoria
dc.contributor.author	Cortina Gil, Eduardo
dc.contributor.author	Ferrer Soria, Antonio
dc.contributor.author	Fuster Verdú, Juan A.
dc.contributor.author	García García, Carmen
dc.contributor.author	Hernández Rey, Juan José
dc.contributor.author	Higón Rodríguez, Emilio
dc.contributor.author	Lacasta Llácer, Carlos
dc.contributor.author	Martínez Vidal, Fernando
dc.contributor.author	Navas Concha, Sergio
dc.contributor.author	Salt Cairols, José
dc.date.accessioned	2014-04-01T08:23:46Z
dc.date.available	2014-04-01T08:23:46Z
dc.date.issued	1996
dc.identifier.citation	DELPHI Collaboration Alemany, R. Cabrera Urbán, Susana Castillo Giménez, María Victoria Cortina, E. Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Hernández Rey, Juan José Higón Rodríguez, Emilio Lacasta Llácer, Carlos Martínez Vidal, Fernando Navas, S. Salt Cairols, José 1996 Search for promptly produced heavy quarkonium states in hadronic Z decays Zeitschrift für Physik C-Particles and Fields 6 575 583
dc.identifier.uri	http://hdl.handle.net/10550/33906
dc.description.abstract	A search has been made for direct production of heavy quarkonium states in more than 3 million hadronicZ 0 decays in the 1991¿1994 DELPHI data. PromptJ/ψ, ψ(2S) andΓ candidates have been searched for through their leptonic decay modes using criteria based on the kinematics and decay vertex positions. New upper limits are set at the 90% confidence level forBr(Z 0→(Qq)X)/Br(Z 0→ hadrons) for various strong production mechanisms ofJ/ψ andΓ; these range down to 0.9×10−4. The limits are set in the presence of a small excess (∼1% statistical probability of a background fluctuation) in the sum of candidates from promptJ/ψ, ψ(2S),γ(1S),γ(2S) andγ(3S) relative to the estimated background.
dc.relation.ispartof	Zeitschrift für Physik C-Particles and Fields, 1996, vol. 6, p. 575-583
dc.subject	Física nuclear
dc.subject	Partícules (Física nuclear)
dc.title	Search for promptly produced heavy quarkonium states in hadronic Z decays
dc.type	journal article	es_ES
dc.date.updated	2014-04-01T08:23:46Z
dc.identifier.doi	10.1007/BF02907441
dc.identifier.idgrec	006589
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1007/BF02907441