The Scalar Meson f0(980) in Heavy-Meson Decays
| dc.creator | El-Bennich, B. | |
| dc.creator | Leitner, O. | |
| dc.creator | Dedonder, J. -P. | |
| dc.creator | Loiseau, B. | |
| dc.date | 2008-10-31 | |
| dc.date | 2009-03-26 | |
| dc.date.accessioned | 2026-07-07T13:06:37Z | |
| dc.date.available | 2026-07-07T13:06:37Z | |
| dc.description | A phenomenological analysis of the scalar meson f0(980) is performed that relies on the quasi-two body decays D and Ds -> f0(980)P, with P=pi, K. The two-body branching ratios are deduced from experimental data on D or Ds -> pi pi pi, K Kbar pi and from the f0(980) -> pi+ pi- and f0(980) -> K+ K- branching fractions. Within a covariant quark model, the scalar form factors F0(q2) for the transitions D and Ds -> f0(980) are computed. The weak D decay amplitudes, in which these form factors enter, are obtained in the naive factorization approach assuming a quark-antiquark state for the scalar and pseudoscalar mesons. They allow to extract information on the f0(980) wave function in terms of u-ubar, d-dbar and s-sbar pairs as well as on the mixing angle between the strange and non-strange components. The weak transition form factors are modeled by the one-loop triangular diagram using two different relativistic approaches: covariant light-front dynamics and dispersion relations. We use the information found on the f0(980) structure to evaluate the scalar and vector form factors in the transitions D and Ds -> f0(980), as well as to make predictions for B and Bs -> f0(980), for the entire kinematically allowed momentum range of q2. | |
| dc.description | 45 pages, 9 figures and 9 tables. The use of dispersion relations to calculate the weak transition form factors is better justified. A more extensive discussion on the strange and non-strange flavor content mixing is introduced. Results unchanged. Version to appear in Phys. Rev. D | |
| dc.identifier | https://arxiv.org/abs/0810.5771 | |
| dc.identifier | http://arxiv.org/abs/0810.5771 | |
| dc.identifier | Phys.Rev.D79:076004,2009 | |
| dc.identifier | doi:10.1103/PhysRevD.79.076004 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/227835 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | The Scalar Meson f0(980) in Heavy-Meson Decays | |
| dc.type | text |