A New Approach to Weak Amplitudes in Large-Nc QCD
| dc.creator | Knecht, M. | |
| dc.creator | Peris, S. | |
| dc.creator | de Rafael, E. | |
| dc.creator | . | |
| dc.date | 1999-10-19 | |
| dc.date.accessioned | 2026-07-07T11:35:46Z | |
| dc.date.available | 2026-07-07T11:35:46Z | |
| dc.description | We report on some recent progress made in understanding weak matrix elements of mesons in the context of the next-to-leading order of the large-Nc approximation to QCD. Specifically, we first use the example of the weak contributions to the pi^+ - pi^0 mass difference to exhibit how a systematic matching can be achieved analytically between short distances and long distances within our large-Nc framework. We are then also able to compute matrix elements of the operator Q_7, as they turn out to depend on the same QCD correlator as the previous pion mass difference. As a final example we determine the chiral counterterms governing the pseudoscalar decay into a lepton pair, where we briefly comment also on the special case K_L -> mu^+ mu^-. | |
| dc.description | 15 pages, 4 figures. LateX. This report covers the material presented by the authors in three separate talks at the QCD'99 conference in Montpellier | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9910396 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9910396 | |
| dc.identifier | Nucl.Phys.Proc.Suppl.86:279-293,2000 | |
| dc.identifier | doi:10.1016/S0920-5632(00)00577-6 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/198703 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | A New Approach to Weak Amplitudes in Large-Nc QCD | |
| dc.type | text |