The $η^\prime g^* g^{(*)}$ Vertex Function in Perturbative QCD and $η^\prime$-Meson Mass Effects
| dc.creator | Ali, A. | |
| dc.creator | Parkhomenko, A. Ya. | |
| dc.date | 2003-10-21 | |
| dc.date | 2003-10-22 | |
| dc.date.accessioned | 2026-07-07T03:50:57Z | |
| dc.date.available | 2026-07-07T03:50:57Z | |
| dc.description | The $η^\prime g^* g^{(*)}$ effective vertex function (EVF) is calculated in the QCD hard-scattering approach, taking into account the $η^\prime$-meson mass. We work in the approximation in which only one non-leading Gegenbauer moment in both the quark-antiquark and gluonic light-cone distribution amplitude for the $η^\prime$-meson is kept. The EVF with one off-shell gluon is shown to have the form $F_{η^\prime g^* g} (q_1^2, 0, m_{η^\prime}^2) = m_{η^\prime}^2 H(q_1^2)/(q_1^2 - m_{η^\prime}^2)$, valid for $|q_1^2| > m_{η^\prime}^2$. An interpolating formulae for the EVF in the space-like region of the virtuality $q_1^2$, which satisfies the QCD-anomaly normalization for on-shell gluons and the perturbative-QCD result for the gluon virtuality $|q_1^2| \gtrsim 2 GeV^2$, is also presented. | |
| dc.description | 4 pages, 2 figures, use svjour.cls and svepj.clo; talk given at the International Europhysics Conference on High-Energy Physics (HEP 2003), 17-23 July 2003, Aachen, Germany. Title changed | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0310250 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0310250 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/42961 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | The $η^\prime g^* g^{(*)}$ Vertex Function in Perturbative QCD and $η^\prime$-Meson Mass Effects | |
| dc.type | text |