Transversity distributions in the nucleon in the large-N-c limit

• Type: Article in International Scientific Journal
• Date: 2001

Authors

Schweitzer, P (Author) Other; Diana Urbano (Author) FEUP; Polyakov, MV (Author) Other; Weiss, C (Author) Other; Pobylitsa, PV (Author) Other; Goeke, K (Author) Other

Journal

Title: Physical Review D: Particles and fields

Vol. 64

ISSN: 0556-2821

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 85 Citations

Scopus - 89 Citations

Other information

Authenticus ID: P-000-TVF

DOI: 10.1103/physrevd.64.034013

Abstract (EN): We compute the quark and antiquark transversity distributions in the nucleon at a low normalization point (mu approximate to 600 MeV) in the large-N-c limit, where the nucleon can be described as a soliton of an effective chiral theory (chiral quark-soliton model). The flavor-nonsinglet distributions deltau(x)-deltad(x) and delta(u) over bar (x)-delta(d) over bar (x) appear in leading order of the 1/N-c expansion, while the flavor-singlet distributions deltau(x)+deltad(x) and delta(u) over bar (x) + delta(d) over bar (x) are nonzero only in next-to-leading order. The transversity quark and antiquark distributions are found to be significantly different from the longitudinally polarized distributions Deltau(x) +/-Deltad(x) and Delta(u) over bar (x) +/-Delta(d) over bar (x), respectively, in contrast with the prediction of the naive nonrelativistic quark model. We show that this affects the predictions for the spin asymmetries in Drell-Yan pair production in transversely polarized pp and p (p) over bar collisions.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 22