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Titolo:
ANALYSIS OF DATA ON POLARIZED LEPTON-NUCLEON SCATTERING - COMMENT
Autore:
PREPARATA G; RATCLIFFE PG;
Indirizzi:
UNIV MILAN,DIPARTIMENTO FIS,VIA CELORIA 16 I-20133 MILAN ITALY IST NAZL FIS NUCL,SEZ MILANO I-20133 MILAN ITALY
Titolo Testata:
Physics letters. Section B
fascicolo: 1-2, volume: 355, anno: 1995,
pagine: 356 - 362
SICI:
0370-2693(1995)355:1-2<356:AODOPL>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
DEEP-INELASTIC-SCATTERING; DEPENDENT PARTON DISTRIBUTIONS; BJORKEN SUM-RULE; STRANGENESS CONTENT; PERTURBATIVE QCD; SPIN STRUCTURE; PROTON; ELECTROPRODUCTION; DEUTERON;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
50
Recensione:
Indirizzi per estratti:
Citazione:
G. Preparata e P.G. Ratcliffe, "ANALYSIS OF DATA ON POLARIZED LEPTON-NUCLEON SCATTERING - COMMENT", Physics letters. Section B, 355(1-2), 1995, pp. 356-362

Abstract

We comment on the suggestion by Ellis and Karliner that discrepanciesbetween the E142 neutron data (together with the EMC proton data) andthe Bjorken sum rule can be explained by higher-twist contributions. Our conclusion, based on the accurate data available on unpolarized structure functions, is that such contributions are strongly constrainedto be negligible, even in the lower energy regions explored by the SLAG deep-inelastic scattering experiments. Thus, based on an analysis of all present polarized data, we re-affirm that the Bjorken system of equations is violated at the two standard-deviation level. Following the spirit of the explanation we have already proposed to this problem,we show that it is sufficient to slightly modify the normalization ofthe Wilson coefficients involved to obtain a self-consistent and physically sensible description of the nucleon spin structure functions.

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Documento generato il 06/07/20 alle ore 08:26:32