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A Strategy to study the role of the charm quark mass in explaining the Delta I=1/2 rule

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A Strategy to study the role of the charm quark mass in explaining the Delta I=1/2 rule

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dc.contributor.author	Giusti, L.
dc.contributor.author	Hernández Gamazo, Pilar
dc.contributor.author	Laine, Mikko
dc.contributor.author	Weisz, P.
dc.contributor.author	Wittig, Hartmut
dc.date.accessioned	2015-04-24T10:23:46Z
dc.date.available	2015-04-24T10:23:46Z
dc.date.issued	2004
dc.identifier.citation	Giusti, L. Hernández Gamazo, Pilar Laine, Mikko Weisz, P. Wittig, Hartmut 2004 A Strategy to study the role of the charm quark mass in explaining the Delta I=1/2 rule Journal of High Energy Physics 2004 0411 016
dc.identifier.uri	http://hdl.handle.net/10550/43366
dc.description.abstract	We present a strategy designed to separate several possible origins of the well-known enhancement of the Delta{I}=1/2 amplitude in non-leptonic kaon decays. In particular, we seek to disentangle the contribution of physics at the typical QCD scale (soft-gluon exchange) from the effects at the scale of the charm quark mass. This is achieved by considering QCD with an unphysically light charm quark, so that the theory possesses an approximate SU(4)_L x SU(4)_R chiral symmetry. By computing the relevant operator matrix elements and monitoring their values as the charm quark mass departs from the SU(4)-symmetric situation, the role of the charm quark can be assessed. We study the influence of the charm quark mass in Chiral Perturbation Theory. First results from lattice simulations in the SU(4)-symmetric limit are also discussed.
dc.language.iso	eng
dc.relation.ispartof	Journal of High Energy Physics, 2004, vol. 2004, num. 0411, p. 016
dc.subject	Física
dc.title	A Strategy to study the role of the charm quark mass in explaining the Delta I=1/2 rule
dc.type	journal article	es_ES
dc.date.updated	2015-04-24T10:23:46Z
dc.identifier.doi	10.1088/1126-6708/2004/11/016
dc.identifier.idgrec	081397
dc.rights.accessRights	open access	es_ES