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Measurement of the spin density matrix for the rho(0), K*(0)(892) and phi produced in Z(0) decays

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Measurement of the spin density matrix for the rho(0), K*(0)(892) and phi produced in Z(0) decays

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dc.contributor.author	DELPHI Collaboration
dc.contributor.author	Ferrer Soria, Antonio
dc.contributor.author	Higón Rodríguez, Emilio
dc.contributor.author	Castillo Giménez, María Victoria
dc.contributor.author	Martí García, Salvador
dc.date.accessioned	2014-08-06T07:25:55Z
dc.date.available	2014-08-06T07:25:55Z
dc.date.issued	1997
dc.identifier.citation	DELPHI Collaboration Ferrer Soria, Antonio Higón Rodríguez, Emilio Castillo Giménez, María Victoria Martí García, Salvador 1997 Measurement of the spin density matrix for the rho(0), K*(0)(892) and phi produced in Z(0) decays Physics Letters B 406 3 271 286
dc.identifier.uri	http://hdl.handle.net/10550/37358
dc.description.abstract	The spin density matrix elements for the ϱ0, K∗0(892) and F produced in hadronic Z0 decays are measured in the DELPHI detector. There is no evidence for spin alignment of the K∗0(892) and F in the region xp ≤ 0.3 (xp = ppbeam), where ϱ00 = 0.33 ± 0.05 and ϱ00 = 0.30 ± 0.04, respectively. In the fragmentation region, xp ≥ 0.4, there is some indication for spin alignment of the ϱ0 and K∗0(892), since ϱ00 = 0.43 ± 0.05 and ϱ00 = 0.46 ± 0.08, respectively. These values are compared with those found in meson-induced hadronic reactions. For the F, ϱ00 = 0.30 ± 0.04 for xp ≥ 0.4 and 0.55 ± 0.10 for xp ≥ 0.7. The off-diagonal spin density matrix element ϱ1-1 is consistent with zero in all cases.
dc.language.iso	eng
dc.relation.ispartof	Physics Letters B, 1997, vol. 406, num. 3, p. 271-286
dc.subject	Partícules (Física nuclear)
dc.subject	Detectors de radiació
dc.title	Measurement of the spin density matrix for the rho(0), K*(0)(892) and phi produced in Z(0) decays
dc.type	journal article	es_ES
dc.date.updated	2014-08-06T07:25:56Z
dc.identifier.doi	10.1016/S0370-2693(97)00758-2
dc.identifier.idgrec	006634
dc.rights.accessRights	open access	es_ES