Scalar form factors $f_{ππ}(Q^2)$ and $f_{KK}(Q^2)$ with light-cone QCD sum rules
| dc.creator | Wang, Zhi-Gang | |
| dc.date | 2007-03-08 | |
| dc.date | 2007-07-22 | |
| dc.date.accessioned | 2026-07-07T11:22:47Z | |
| dc.date.available | 2026-07-07T11:22:47Z | |
| dc.description | In this article, we calculate the scalar form-factors $f_{ππ}(Q^2)$ and $f_{KK}(Q^2)$ in the framework of the light-cone QCD sum rules approach. The numerical value of the $f_{ππ}(Q^2)$ changes quickly with variation of $Q^2$ near zero momentum transfer, while the $f_{KK}(Q^2)$ has rather good behavior at small momentum transfer. The value $f_{KK}(0) =2.21^{+0.35}_{-0.19} GeV$ is compatible with the result from the leading order chiral perturbation theory. At large momentum transfer with $Q^2> 6GeV^2$, the form-factor $f_{ππ}(Q^2)$ takes up the asymptotic behavior $\frac{1}{Q^2}$ approximately, while the $f_{KK}(Q^2)$ decreases more quickly than $\frac{1}{Q^2}$. | |
| dc.description | 22 pages, 13 figures, slight modification | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0703090 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0703090 | |
| dc.identifier | J.Phys.G34:2183-2197,2007 | |
| dc.identifier | doi:10.1088/0954-3899/34/10/008 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/194687 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Scalar form factors $f_{ππ}(Q^2)$ and $f_{KK}(Q^2)$ with light-cone QCD sum rules | |
| dc.type | text |