Analysis of the $Σ-n $ form factors with light-cone QCD sum rules
| dc.creator | Wang, Z. G. | |
| dc.date | 2006-09-16 | |
| dc.date | 2007-02-03 | |
| dc.date.accessioned | 2026-07-07T07:46:13Z | |
| dc.date.available | 2026-07-07T07:46:13Z | |
| dc.description | In this work, we study the four form-factors $f_1(Q^2)$, $f_2(Q^2)$, $g_1(Q^2)$ and $g_2(Q^2)$ of the $Σ\to n$ in the framework of the light-cone QCD sum rules approach up to twist-6 three valence quark light-cone distribution amplitudes. The $f_1(0)$ is the basic input parameter in extracting the CKM matrix element $|V_{us}|$ from the hyperon decays. The four form-factors $f_1(Q^2)$, $f_2(Q^2)$, $g_1(Q^2)$ and $g_2(Q^2)$ at intermediate and large momentum transfers with $Q^2> 3 GeV^2$ have significant contributions from the end-point (soft) terms. The numerical values of the four form-factors $f_1(0)$, $f_2(0)$, $g_1(0)$ and $g_2(0)$ are compatible with the experimental data and theoretical calculations (in magnitude); although the uncertainties are large. | |
| dc.description | 16 pages, 4 figures, second version, typos corrected, the article is published in "J. Phys. G34 (2007) 493-504" not in "J. Phys. G34 (2007) 335-346" | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0609155 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0609155 | |
| dc.identifier | J.Phys. G34 (2007) 493-504 | |
| dc.identifier | doi:10.1088/0954-3899/34/3/007 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/123757 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Analysis of the $Σ-n $ form factors with light-cone QCD sum rules | |
| dc.type | text |