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Titolo:
Transversity distribution and polarized fragmentation function from semi-inclusive pion electroproduction
Autore:
Korotkov, VA; Nowak, WD; Oganessyan, KA;
Indirizzi:
IHEP, Protvino 142284, Russia IHEP Protvino Russia 142284IHEP, Protvino 142284, Russia DESY, D-15738 Zeuthen, Germany DESY Zeuthen Germany D-15738DESY, D-15738 Zeuthen, Germany Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy Ist Nazl FisNucl Frascati Italy I-00044 ascati, I-00044 Frascati, Italy Yerevan Phys Inst, Yerevan 375036, Armenia Yerevan Phys Inst Yerevan Armenia 375036 s Inst, Yerevan 375036, Armenia
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL C
fascicolo: 4, volume: 18, anno: 2001,
pagine: 639 - 644
SICI:
1434-6044(200101)18:4<639:TDAPFF>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
DEEP-INELASTIC SCATTERING; SPIN ASYMMETRIES; NUCLEONS TRANSVERSITY; PARTON DISTRIBUTIONS; QUARK DISTRIBUTIONS; NUMERICAL-SOLUTION; MODEL ANALYSIS; EVOLUTION; LEPTOPRODUCTION; COLLISIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Korotkov, VA IHEP, Protvino 142284, Russia IHEP Protvino Russia 142284IHEP, Protvino 142284, Russia
Citazione:
V.A. Korotkov et al., "Transversity distribution and polarized fragmentation function from semi-inclusive pion electroproduction", EUR PHY J C, 18(4), 2001, pp. 639-644

Abstract

A method is discussed to determine the hitherto unknown u-quark transversity distribution deltau(x) from a planned HERMES measurement of a single target-spin asymmetry in semi-inclusive pion electroproduction off a transversely polarized target. Assuming u-quark dominance, the measurement yields the shapes of the transversity distribution deltau(x) and of the ratio H-1(perpendicular to (1)u)(z)/D-1(u)(z), of polarized and unpolarized u-quark fragmentation functions. The unknown relative normalization can be obtained byidentifying the transversity distribution With the well-known helicity distribution at large z and small Q(2). The systematic uncertainty of the method is dominated by the assumption of u-quark dominance.

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Documento generato il 25/01/20 alle ore 16:26:48