The Standard Model prediction for R_{e/mu}^{(pi,K)}

dc.creator	Cirigliano, Vincenzo
dc.creator	Rosell, Ignasi
dc.date	2007-07-23
dc.date.accessioned	2026-07-07T11:41:34Z
dc.date.available	2026-07-07T11:41:34Z
dc.description	We study the ratios R_{e/mu}^{(P)} = Gamma(P -> e nu [gamma])/Gamma(P -> mu nu [gamma]) (P=pi,K) in Chiral Perturbation Theory to order e^2 p^4. We complement the two-loop effective theory results with a matching calculation of the counterterm, finding R_{e/mu}^{(pi)} = (1.2352 \pm 0.0001)10^(-4) and R_{e/mu}^{(K)} = (2.477 \pm 0.001)10^(-5).
dc.description	4 pages, 1 figure, 2 tables
dc.identifier	https://arxiv.org/abs/0707.3439
dc.identifier	http://arxiv.org/abs/0707.3439
dc.identifier	Phys.Rev.Lett.99:231801,2007
dc.identifier	doi:10.1103/PhysRevLett.99.231801
dc.identifier.uri	http://salesiana.dossiersoluciones.com/handle/123456789/200581
dc.subject	High Energy Physics - Phenomenology
dc.title	The Standard Model prediction for R_{e/mu}^{(pi,K)}
dc.type	text

Collections