Factorization at fixed \(Q^{2}(1 - x)\)

DOI10.1088/1126-6708/2008/10/086zbMATH Open1245.81296arXiv0808.0626OpenAlexW3121153357MaRDI QIDQ440436

Author name not available (Why is that?)

Publication date: 18 August 2012

Published in: (Search for Journal in Brave)

Abstract: 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 -> gamma^* + X in detail, explaining why the virtual photon is longitudinally polarized for h = pi and 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 -> Lambda^uparrow X and in p p^uparrow -> pi X.

Full work available at URL: https://arxiv.org/abs/0808.0626

Mathematics Subject Classification ID

No records found.

This page was built for publication: Factorization at fixed \(Q^{2}(1 - x)\)

Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q440436)