Isospin Breaking in the Relation Between the tau-->nu_tau pi pi and e^+e^- -->pi^+ pi^- Versions of |F_π(s)|^2$ and Implications for (g-2)_mu
| dc.creator | Maltman, Kim | |
| dc.creator | Wolfe, Carl E. | |
| dc.date | 2005-09-21 | |
| dc.date.accessioned | 2026-07-07T10:29:42Z | |
| dc.date.available | 2026-07-07T10:29:42Z | |
| dc.description | We investigate two points related to existing treatments of isospin-breaking corrections to the CVC relation between the e^+e^- --> pi^+ pi^- cross-section and dGamma[tau^- --> nu_tau pi^- pi^0]/ds. Implications for the value of the hadronic contribution to a_mu =(g-2)_mu /2 based on those analyses incorporating hadronic tau decay data are also considered. We conclude that the uncertainty on the isospin-breaking correction which must be applied to the tau decay data should be significantly increased, and that the central value of the rho-omega ``mixing'' contribution to this correction may be significantly smaller than indicated by the present standard determination. Such a shift would contribute to reducing the discrepancy between the tau- and electroproduction-based determinations of the leading order hadronic contribution to a_mu. | |
| dc.description | 15 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0509224 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0509224 | |
| dc.identifier | Phys.Rev.D73:013004,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.73.013004 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177895 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Isospin Breaking in the Relation Between the tau-->nu_tau pi pi and e^+e^- -->pi^+ pi^- Versions of |F_π(s)|^2$ and Implications for (g-2)_mu | |
| dc.type | text |