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The tau-->nu tauetapi process in and beyond QCD

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dc.contributor.author	Bramón Planas, Albert
dc.contributor.author	Narison, Stephan
dc.contributor.author	Pich Zardoya, Antonio
dc.date.accessioned	2014-11-11T08:58:05Z
dc.date.available	2014-11-11T08:58:05Z
dc.date.issued	1987
dc.identifier.citation	Bramón Planas, Albert Narison, Stephan Pich Zardoya, Antonio 1987 The tau-->nu tauetapi process in and beyond QCD Physics Letters B 196 4 543 546
dc.identifier.uri	http://hdl.handle.net/10550/39700
dc.description.abstract	We estimate various sources of the tau-->nu tauetapi process by using QCD-duality sum rule information on the decay constants of standard and exotic mesons. We use the pi--> lnu l decay in order to constrain the effects of new interactions. We conclude from our analysis that in al cases, the tau-->nu tauetapi branching ration is small. We also point out that the present data on the tau-->nupi process already provide an upper limit of 0.1% on the etapi mode while the tau-->nu tauKK¯ data imply an upper limit of 0.5% if the a 0 (980)- meson is a four-quark state.
dc.language.iso	eng
dc.relation.ispartof	Physics Letters B, 1987, vol. 196, num. 4, p. 543-546
dc.subject	Física
dc.title	The tau-->nu tauetapi process in and beyond QCD
dc.type	journal article	es_ES
dc.date.updated	2014-11-11T08:58:05Z
dc.identifier.doi	10.1016/0370-2693(87)90817-3
dc.identifier.idgrec	081644
dc.rights.accessRights	open access	es_ES