Factorization at fixed Q^2(1-x)
| dc.creator | Hoyer, Paul | |
| dc.creator | Jarvinen, Matti | |
| dc.creator | Kurki, Samu | |
| dc.date | 2008-08-05 | |
| dc.date | 2008-10-24 | |
| dc.date.accessioned | 2026-07-07T12:42:36Z | |
| dc.date.available | 2026-07-07T12:42:36Z | |
| dc.description | We consider QCD factorization between hard and soft subprocesses in inclusive reactions where the momentum fraction x of one parton approaches unity as the hard scale Q^2 -> \infty, such that Q^2(1-x) is fixed. In this "BB limit" the entire (multi-parton) Fock state containing the high x parton is coherent with the hard subprocess. The soft contribution is given by a forward multiparton matrix element. The BB limit corresponds to a fixed (large or small) missing mass and is thus closely connected to exclusive production. We analyze the Drell-Yan process h + N -> γ^* + X in detail, explaining why the virtual photon is longitudinally polarized for h = πand transversely polarized for h = p. The BB limit may be relevant also for other phenomena observed at high x, such as the large single spin asymmetries of p p -> Λ^\uparrow X and in p p^\uparrow -> πX. | |
| dc.description | 18 pages, 6 figures. v2: Version published in JHEP. Text modified as suggested by the referee | |
| dc.identifier | https://arxiv.org/abs/0808.0626 | |
| dc.identifier | http://arxiv.org/abs/0808.0626 | |
| dc.identifier | JHEP 0810:086,2008 | |
| dc.identifier | doi:10.1088/1126-6708/2008/10/086 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/220134 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Factorization at fixed Q^2(1-x) | |
| dc.type | text |