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Inclusive Sigma(-) and Lambda(1520) production in hadronic Z decays

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Inclusive Sigma(-) and Lambda(1520) production 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	Costa Mezquita, María José
dc.contributor.author	Ferrer Soria, Antonio
dc.contributor.author	Fuster Verdú, Juan A.
dc.contributor.author	García García, Carmen
dc.contributor.author	Gil Botella, Inés
dc.contributor.author	Hernández Rey, Juan José
dc.contributor.author	Higón Rodríguez, Emilio
dc.contributor.author	Oyanguren Campos, Arantza
dc.contributor.author	Salt Cairols, José
dc.contributor.author	Tortosa Martínez, Pablo
dc.date.accessioned	2014-03-28T13:46:43Z
dc.date.available	2014-03-28T13:46:43Z
dc.date.issued	2000
dc.identifier.citation	DELPHI Collaboration Alemany, R. Cabrera Urbán, Susana Castillo Giménez, María Victoria Cortina, E. Costa, M. Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gil, I. Hernández Rey, Juan José Higón Rodríguez, Emilio Oyanguren Campos, Arantza Salt Cairols, José ,Tortosa Martínez, Pablo, 2000 Inclusive Sigma(-) and Lambda(1520) production in hadronic Z decays Physics Letters B 475 3-4 429 447
dc.identifier.uri	http://hdl.handle.net/10550/33766
dc.description.abstract	Production of Sigma- and Lambda(1520) in hadronic Z decays has been measured using the DELPHI detector at LEP. The Sigma- is directly reconstructed as a charged track in the DELPHI microvertex detector and is identified by its Sigma -> n pi decay leading to a kink between the Sigma- and pi-track. The reconstruction of the Lambda(1520) resonance relies strongly on the particle identification capabilities of the barrel Ring Imaging Cherenkov detector and on the ionisation loss measurement of the TPC. Inclusive production spectra are measured for both particles. The production rates are measured to be <N_{Sigma-}/N_{Z}^{had}> = 0.081 +/- 0.002 +/- 0.010, <N_{Lambda(1520)}/N_{Z}^{had}> = 0.029 +/- 0.005 +/- 0.005. The production rate of the Lambda(1520) suggests that a large fraction of the stable baryons descend from orbitally excited baryonic states. It is shown that the baryon production rates in Z decays follow a universal phenomenological law related to isospin, strangeness and mass of the particles.
dc.relation.ispartof	Physics Letters B, 2000, vol. 475, num. 3-4, p. 429-447
dc.subject	Física nuclear
dc.subject	Partícules (Física nuclear)
dc.title	Inclusive Sigma(-) and Lambda(1520) production in hadronic Z decays
dc.type	journal article	es_ES
dc.date.updated	2014-03-28T13:46:43Z
dc.identifier.doi	10.1016/S0370-2693(00)00081-2
dc.identifier.idgrec	006695
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1016/S0370-2693(00)00081-2