NAGIOS: RODERIC FUNCIONANDO

Gamma(Z --> bb): A signature of hard mass terms for a heavy top

Repositori DSpace/Manakin

dc.contributor.author	Bernabeu Alberola, José
dc.contributor.author	Pich Zardoya, Antonio
dc.contributor.author	Santamaria, Arcadi
dc.date.accessioned	2014-11-11T12:35:39Z
dc.date.available	2014-11-11T12:35:39Z
dc.date.issued	1988
dc.identifier.citation	Bernabeu Alberola, José; Pich Zardoya, Antonio; Santamaria Luna, Arcadi (1988) Gamma(Z --> bb): A signature of hard mass terms for a heavy top Physics Letters B 200 4 569 574
dc.identifier.uri	http://hdl.handle.net/10550/39732
dc.description.abstract	We calculate analytically the weak radiative corrections to the weak neutral current gauge boson-bottom fermion vertex, keeping the mass mt of the internal fermion line for the relevant diagrams. We find, to order alpha, a hard mass-term dependence mt2/MW2 of the amplitude, for large mt values. Its origin comes from the unphysical charged Higgs coupling to fermions in the renormalizable gauge or, equivalently, from the longitudinal charged gauge boson couplings. The diagonal Z0 decay width to b-quarks decreases, due to these weak radiative corrections, by 0.6%-2.5% when the top mass mt varies from 45 to 200 GeV.
dc.language.iso	eng
dc.relation.ispartof	Physics Letters B, 1988, vol. 200, num. 4, p. 569-574
dc.subject	Física
dc.title	Gamma(Z --> bb): A signature of hard mass terms for a heavy top
dc.type	journal article	es_ES
dc.date.updated	2014-11-11T12:35:39Z
dc.identifier.doi	10.1016/0370-2693(88)90173-6
dc.identifier.idgrec	069067
dc.rights.accessRights	open access	es_ES