ISOSPIN SYMMETRY VIOLATION OF THE NUCLEON SEA OR DIQUARKS

被引：18

作者：

ANSELMINO, M

PREDAZZI, E

机构：

[1] IST NAZL FIS NUCL,I-09127 CAGLIARI,ITALY

[2] UNIV TURIN,DIPARTMENTO FIS TEOR,I-10125 TURIN,ITALY

[3] IST NAZL FIS NUCL,TURIN,ITALY

来源：

PHYSICS LETTERS B | 1991年 / 254卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(91)90421-L

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The preliminary results of the NMC on deep inelastic muon scattering experiments show a violation of the Gottfried sum rule, which, in the quark parton model of the nucleon, seems to imply a violation of the u and d flavour symmetry of the sea partons. We argue that this is not necessarily the case; a small admixture of vector diquarks in a quark-diquark model of the nucleon leads naturally to the experimental result. From the data we are led to a very mild Q2 dependence.

引用

页码：203 / 206

页数：4

共 18 条

[1]

ANSELMINO M, 1990, UNPUB PHYS REV D

[2]

ANSELMINO M, 1989, P WORKSHOP DIQUARKS

[3]

ANSELMINO M, IN PRESS Z PHYS C

[4]

ESAIBEGYAN SV, 1974, JETP LETT+, V19, P227

[5] PROBING SPIN-1 DIQUARKS IN DEEP INELASTIC STRUCTURE FUNCTIONS [J].

FREDRIKSSON, S ;

JANDEL, M ;

LARSSON, T .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1983, 19 (01) :53-55

[6] A NEW DIQUARK MODEL FOR DEEP INELASTIC STRUCTURE FUNCTIONS [J].

FREDRIKSSON, S ;

JANDEL, M ;

LARSSON, T .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1982, 14 (01) :35-39

[7] SUM RULE FOR HIGH-ENERGY ELECTRON-PROTON SCATTERING [J].

GOTTFRIED, K .

PHYSICAL REVIEW LETTERS, 1967, 18 (25) :1174-+

[8] EXCLUSIVE PRODUCTION OF HEAVY FLAVORS IN PROTON-ANTIPROTON ANNIHILATION [J].

KROLL, P ;

QUADDER, B ;

SCHWEIGER, W .

NUCLEAR PHYSICS B, 1989, 316 (02) :373-390

[9]

KROLL P, 1990, WU B9015 U WUPP PREP

[10]

KROLL P, 1989, P WORKSH DIQ, P13

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