%0 Conference Proceedings
%T Tests of the nature and of the gluon content of the \sigma(0.6) from D and D_{s} semileptonic decays
%+ Laboratoire de Physique Mathématique et Théorique (PMT)
%A Dosh, Hans Guenter
%A Narison, Stephan
%Z DOI: 10.1016/S0920-5632(03)01824-3
%< avec comité de lecture
%Z 03-057
%( Nuclear Physics B - Proceedings Supplements
%B QCD 02 9th High-Energy Physics International Conference on Quantum ChromoDynamics
%C Montpellier, France
%I Elsevier
%V 121
%P 114-118
%8 2002-07-08
%D 2002
%Z hep-ph/0208271
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Conference papers
%X We quantitatively study the effects, beyond the SVZ-expansion, due to instanton and tachyonic gluon mass, to the scalar isoscalar two-point functions supporting the fact that the QCD spectral sum do not favour the $\bar uu+\bar dd$ interpretation of the broad and low mass ?(0.6). Then, we emphasize that a measurement of the Ds semileptonic decays into ?? can reveal in a model-independent way its eventual gluon component ?B. The analysis also implies that one expects an observation of the $K\bar K$ final states from the ?B which may compete (if phase space allowed) with the one from a low mass $\bar ss$ state assumed in the literature to be the SU(3) partner of the observed u(0.6) if the latter is a $\bar uu+\bar dd$ state.
%G English
%L hal-00328139
%U https://hal.science/hal-00328139
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2