Analyticity constraints on the strangeness changing vector current and applications to $τ\to Kπν_τ$, $τ\to Kππν_τ$
| dc.creator | Moussallam, B. | |
| dc.date | 2007-10-02 | |
| dc.date | 2007-11-02 | |
| dc.date.accessioned | 2026-07-07T11:19:43Z | |
| dc.date.available | 2026-07-07T11:19:43Z | |
| dc.description | We discuss matrix elements of the strangeness changing vector current using their relation, due to analyticity, with $πK$ scattering in the $P$-wave. We take into account experimental phase-shift measurements in the elastic channel as well as results, obtained by the LASS collaboration, on the details of inelastic scattering, which show the dominance of two quasi two-body channels at medium energies.The associated form factors are shown to be completely determined, up to one flavour symmetry breaking parameter, imposing boundary conditions at $t=0$ from chiral and flavour symmetries and at $t\to\infty$ from QCD. We apply the results to the $τ\to Kπν_τ$ and $τ\to Kππν_τ$ amplitudes and compare the former to recent high statistics results from B factories. | |
| dc.description | 24 pages, 11 figures. v2: minor corrections and clarifications | |
| dc.identifier | https://arxiv.org/abs/0710.0548 | |
| dc.identifier | http://arxiv.org/abs/0710.0548 | |
| dc.identifier | Eur.Phys.J.C53:401-412,2008 | |
| dc.identifier | doi:10.1140/epjc/s10052-007-0464-7 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/193780 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Analyticity constraints on the strangeness changing vector current and applications to $τ\to Kπν_τ$, $τ\to Kππν_τ$ | |
| dc.type | text |