Longitudinal virtual photons and the interference terms in ep collisions
| dc.creator | Jezuita-Dabrowska, Urszula | |
| dc.creator | Krawczyk, Maria | |
| dc.date | 2002-11-08 | |
| dc.date.accessioned | 2026-07-07T03:48:29Z | |
| dc.date.available | 2026-07-07T03:48:29Z | |
| dc.description | The importance of the contributions of the longitudinally polarized virtual photon in ep collisions is investigated. We derive the factorization formulae for the unpolarized inclusive and semi-inclusive ep collisions in an arbitrary reference frame. The numerical calculations for the prompt photons production in the unpolarized Compton process (e p --> e gamma X) at the ep HERA collider are performed in the Born approximation. We studied various distributions in the ep centre-of-mass frame and found that the differential cross section for the longitudinally polarized intermediate photon and the term due to the interference between the longitudinal- and transverse- polarization states of the photon are small, i.e. below 10% of the cross section. Moreover, these two contributions almost cancel one another, leading to a stronger domination of the transversely polarized virtual photon, even for its large virtuality. Relevance of the resolved longitudinal photon in a jet production in DIS events at HERA is commented. A relatively large (about 30%) effect due to the longitudinal-transverse interference term was found in the azimuthal-angle distribution in the Breit frame. | |
| dc.description | 20 pages, 8 figures, Latex | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0211112 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0211112 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/42028 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Longitudinal virtual photons and the interference terms in ep collisions | |
| dc.type | text |