Additional Isospin-Breaking Effects in ε^\prime/ε
| dc.creator | Gardner, S. | |
| dc.creator | Valencia, G. | |
| dc.date | 1999-09-01 | |
| dc.date | 1999-09-13 | |
| dc.date.accessioned | 2026-07-07T11:35:44Z | |
| dc.date.available | 2026-07-07T11:35:44Z | |
| dc.description | In the analysis of ε^\prime/εit has been traditional to consider the isospin-breaking effects arising from electroweak-penguin contributions and from π^0-ηand π^0-η^\prime mixing, yet additional isospin-violating effects exist. In particular, we study the isospin violation which arises from the u-d quark mass difference in the hadronization of the gluonic penguin operator, engendering contributions of an effective ΔI=3/2 character. Using chiral perturbation theory and the factorization approximation for the hadronic matrix elements, we find within a specific model for the low-energy constants that we can readily accommodate an increase in ε^\prime/εby a factor of two. | |
| dc.description | 11 pages, LaTeX; notational errors rectified, refs. added, footnote corrected | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9909202 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9909202 | |
| dc.identifier | Phys.Lett.B466:355-362,1999 | |
| dc.identifier | doi:10.1016/S0370-2693(99)01164-8 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/198692 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Additional Isospin-Breaking Effects in ε^\prime/ε | |
| dc.type | text |