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Titolo:
Transversity distributions in the nucleon in the large-N-c limit - art. no. 034013
Autore:
Schweitzer, P; Urbano, D; Polyakov, MV; Weiss, C; Pobylitsa, PV; Goeke, K;
Indirizzi:
Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany Ruhr Univ Bochum Bochum Germany D-44780 Phys 2, D-44780 Bochum, Germany Univ Oporto, Fac Engn, P-4000 Oporto, Portugal Univ Oporto Oporto Portugal P-4000 to, Fac Engn, P-4000 Oporto, Portugal Petersburg Nucl Phys Inst, St Petersburg 188350, Russia Petersburg Nucl Phys Inst St Petersburg Russia 188350 urg 188350, Russia Univ Regensburg, Inst Theoret Phys, D-93053 Regensburg, Germany Univ Regensburg Regensburg Germany D-93053 , D-93053 Regensburg, Germany
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 3, volume: 6403, anno: 2001,
pagine: 4013 -
SICI:
0556-2821(20010801)6403:3<4013:TDITNI>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
TO-LEADING-ORDER; QUARK-SOLITON MODEL; INTERFERENCE FRAGMENTATION FUNCTIONS; POLARIZED PARTON DISTRIBUTIONS; DEEP-INELASTIC SCATTERING; DRELL-YAN PROCESSES; SPIN ASYMMETRIES; AZIMUTHAL ASYMMETRIES; SOFFERS INEQUALITY; SEMIINCLUSIVE DIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
84
Recensione:
Indirizzi per estratti:
Indirizzo: Schweitzer, P Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany Ruhr Univ Bochum Bochum Germany D-44780 80 Bochum, Germany
Citazione:
P. Schweitzer et al., "Transversity distributions in the nucleon in the large-N-c limit - art. no. 034013", PHYS REV D, 6403(3), 2001, pp. 4013

Abstract

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) overbar (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.

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Documento generato il 20/01/20 alle ore 23:11:59