AXIAL CHARGES AND FORM-FACTORS OF THE NUCLEON

被引：24

作者：

BERNARD, V

KAISER, N

MEISSNER, UG

机构：

[1] UNIV LOUIS PASTEUR,F-67037 STRASBOURG,FRANCE

[2] NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK

[3] UNIV BERN,INST THEORET PHYS,CH-3012 BERN,SWITZERLAND

来源：

PHYSICS LETTERS B | 1990年 / 237卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(90)91222-W

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the axial charges and form factors of the nucleon in a realistic two-flavor model including the coupling to an isoscalar-pseudoscalar field (η). We demonstrate that the isosinglet axial charge gA(0), measuring the fraction of the proton's spin carried by quarks, is of order O(1) in the large-Nc expansion and find Δu+Δd{reversed tilde equals}0.3 in agreement with experiment. We also calculate isosinglet and isotriplet axial-vector form factors. These are of dipole-type with cutoff masses MA(3)=1.04 GeV and MA(0)=1.27 GeV, respectively. We estimate the influence of these results on the strangeness content of the proton and parity-violating electron-proton scattering. © 1990.

引用

页码：545 / 550

页数：6

共 21 条

[1] A STUDY OF THE AXIAL-VECTOR FORM-FACTOR AND 2ND-CLASS CURRENTS IN ANTINEUTRINO QUASIELASTIC SCATTERING [J].

AHRENS, LA ;

ARONSON, SH ;

GIBBARD, BG ;

MURTAGH, MJ ;

WHITE, DH ;

CALLAS, JL ;

CUTTS, D ;

DIWAN, M ;

HOFTUN, JS ;

LANOU, RE ;

KURIHARA, Y ;

ABE, K ;

AMAKO, K ;

KABE, S ;

SHINKAWA, T ;

TERADA, S ;

NAGASHIMA, Y ;

SUZUKI, Y ;

YAMAGUCHI, Y ;

BEIER, EW ;

DURKIN, LS ;

HEAGY, SM ;

MANN, AK ;

HEDIN, D ;

MARX, MD ;

STERN, E .

PHYSICS LETTERS B, 1988, 202 (02) :284-288

[2] A MEASUREMENT OF THE SPIN ASYMMETRY AND DETERMINATION OF THE STRUCTURE-FUNCTION G1 IN DEEP INELASTIC MUON PROTON-SCATTERING [J].

ASHMAN, J ;

BADELEK, B ;

BAUM, G ;

BEAUFAYS, J ;

BEE, CP ;

BENCHOUK, C ;

BIRD, IG ;

BROWN, SC ;

CAPUTO, MC ;

CHEUNG, HWK ;

CHIMA, J ;

CIBOROWSKI, J ;

CLIFFT, RW ;

COIGNET, G ;

COMBLEY, F ;

COURT, G ;

DAGOSTINI, G ;

DREES, J ;

DUREN, M ;

DYCE, N ;

EDWARDS, AW ;

EDWARDS, M ;

ERNST, T ;

FERRERO, MI ;

FRANCIS, D ;

GABATHULER, E ;

GAJEWSKI, J ;

GAMET, R ;

GIBSON, V ;

GILLIES, J ;

GRAFSTROM, P ;

HAMACHER, K ;

VONHARRACH, D ;

HAYMAN, P ;

HOLT, JR ;

HUGHES, VW ;

JACHOLKOWSKA, A ;

JONES, T ;

KABUSS, EM ;

KORZEN, B ;

KRUNER, U ;

KULLANDER, S ;

LANDGRAF, U ;

LANSKE, D ;

LETTENSTROM, F ;

LINDQVIST, T ;

LOKEN, J ;

MATTHEWS, M ;

MIZUNO, Y ;

MONIG, K .

PHYSICS LETTERS B, 1988, 206 (02) :364-370

[3] STRANGE-QUARK VECTOR CURRENTS AND PARITY-VIOLATING ELECTRON-SCATTERING FROM THE NUCLEON AND FROM NUCLEI [J].

BECK, DH .

PHYSICAL REVIEW D, 1989, 39 (11) :3248-3256

[4] STRANGE GOINGS ON IN THE PROTON [J].

BERNARD, V ;

MEISSNER, UG .

PHYSICS LETTERS B, 1989, 216 (3-4) :392-396

[5] LOW-ENERGY CONSTRAINTS ON STRANGE MATRIX-ELEMENTS OF THE PROTON [J].

BERNARD, V ;

MEISSNER, UG .

PHYSICS LETTERS B, 1989, 223 (3-4) :439-444

[6]

Bernard V., UNPUB

[7] CHIRAL SYMMETRY AND THE SPIN OF THE PROTON [J].

BRODSKY, SJ ;

ELLIS, J ;

KARLINER, M .

PHYSICS LETTERS B, 1988, 206 (02) :309-315

[8] POLARIZED-ELECTRON-NUCLEON SCATTERING IN GAUGE THEORIES OF WEAK AND ELECTROMAGNETIC-INTERACTIONS [J].

CAHN, RN ;

GILMAN, FJ .

PHYSICAL REVIEW D, 1978, 17 (05) :1313-1322

[9]

CLOSE FE, 1989, PREPRINT ORNL

[10]

COHEN TD, 1989, PHYS LETT B, V230, P129, DOI 10.1016/0370-2693(89)91666-3

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