epsilon'/epsilon in the 1/N_c Expansion
| dc.creator | Hambye, T. | |
| dc.creator | Soldan, P. H. | |
| dc.date | 1999-08-03 | |
| dc.date.accessioned | 2026-07-07T04:07:44Z | |
| dc.date.available | 2026-07-07T04:07:44Z | |
| dc.description | We present a new analysis of the ratio epsilon'/epsilon which measures the direct CP violation in K\toππdecays. We use the 1/N_c expansion within the framework of the effective chiral lagrangian for pseudoscalar mesons. From general counting arguments we show that the matrix element of the operator Q_6 is not protected from possible large 1/N_c corrections beyond its large-N_c or VSA value. Calculating the 1/N_c corrections, we explicitly find that they are large and positive. Our result indicates that a ΔI=1/2 enhancement is operative for Q_6 similar to the one of Q_1 and Q_2 which dominate the CP conserving amplitude. This enhances epsilon'/epsilon and can bring the standard model prediction close to the measured value for central values of the parameters. | |
| dc.description | 9 pages, LaTeX, talk presented by T. Hambye at the 1999 Chicago Conference on Kaon Physics (KAON 99), Chicago, IL, 21-26 Jun 1999 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9908232 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9908232 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/49259 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | epsilon'/epsilon in the 1/N_c Expansion | |
| dc.type | text |