Lattice calculation of the strangeness magnetic moment of the nucleon

被引：110

作者：

Dong, SJ ^{[1
]}

Liu, KF

Williams, AG

机构：

[1] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[2] Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia

[3] Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia

来源：

PHYSICAL REVIEW D | 1998年 / 58卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.58.074504

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on a lattice QCD calculation of the strangeness magnetic moment of the nucleon. Our result is G(M)(s)(0) = -0.36+/-0.20. The sea contributions from the u and d quarks are about 80% larger. However, they cancel to a large extent due to their electric charges, resulting in a smaller net sea contribution of -0.097+/-0.037 mu(N) to the nucleon magnetic moment. As far as the neutron to proton magnetic moment ratio is concerned, this sea contribution tends to cancel out the cloud-quark effect from the Z graphs and results in a ratio of -0.68+/-0.04 which is close to the SU(6) relation and the experiment. The strangeness Sachs electric mean-square radius [r(s)(2)](E) found to be small and negative. [S0556-2821(98)01817-7].

引用

页数：5

共 32 条

[1] MEASUREMENT OF ATOMIC MOTION IN A STANDING LIGHT-FIELD BY HOMODYNE DETECTION [J].

QUADT, R ;

COLLETT, M ;

WALLS, DF .

PHYSICAL REVIEW LETTERS, 1995, 74 (03) :351-354

[2] MEASUREMENT OF THE (P)OVER-BARP-]PI+PI- AND (P)OVER-BARP-]K+K- ANNIHILATION FREQUENCIES IN A 5 MB HYDROGEN GAS-TARGET [J].

ABLEEV, VG ;

ADAMO, A ;

AGNELLO, M ;

ANDRIGHETTO, A ;

BALESTRA, F ;

BELLI, G ;

BENDISCIOLI, G ;

BERTIN, A ;

BOCCACCIO, P ;

BONAZZOLA, GC ;

BRESSANI, T ;

BRUSCHI, M ;

BUSSA, MP ;

BUSSO, L ;

CALVO, D ;

CAPPONI, M ;

CERELLO, P ;

CICALO, C ;

CORRADINI, M ;

COSTA, S ;

DANTONE, I ;

DECASTRO, S ;

DISEP, F ;

DONZELLA, A ;

FAVA, L ;

FELICIELLO, A ;

FERRERO, L ;

FILIPPI, A ;

FILIPPINI, V ;

GALLI, D ;

GARFAGNINI, R ;

GASTALDI, U ;

GIANOTTI, P ;

GRASSO, A ;

GUARALDO, C ;

IAZZI, F ;

LAI, A ;

LANARO, A ;

RIZZINI, EL ;

LOMBARDI, M ;

LUCHERINI, V ;

MAGGIORA, A ;

MANEVA, G ;

MARCELLO, S ;

MARCONI, U ;

MARGAGLIOTTI, G ;

MARON, G ;

MASONI, A ;

MASSA, I ;

MINETTI, B .

PHYSICS LETTERS B, 1994, 329 (2-3) :407-412

[3] AN INVESTIGATION OF THE SPIN STRUCTURE OF THE PROTON IN DEEP INELASTIC-SCATTERING OF POLARIZED MUONS ON POLARIZED PROTONS [J].

ASHMAN, J ;

BADELEK, B ;

BAUM, G ;

BEAUFAYS, J ;

BEE, CP ;

BENCHOUK, C ;

BIRD, IG ;

BROWN, SC ;

CAPUTO, MC ;

CHEUNG, HWK ;

CHIMA, JS ;

CIBOROWSKI, J ;

CLIFFT, R ;

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 ;

GAMET, R ;

GIBSON, V ;

GILLIES, J ;

GRAFSTROM, P ;

HAMACHER, K ;

HARRACH, DV ;

HAYMAN, PJ ;

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 ;

MONTANET, F .

NUCLEAR PHYSICS B, 1989, 328 (01) :1-35

[4]

BECK D, PR91017 T JEFF LAB

[5]

BEISE E, PR91004 T JEFF LAB

[6] CHIRAL SYMMETRY AND THE HIGGS-BOSON NUCLEON COUPLING [J].

CHENG, TP .

PHYSICAL REVIEW D, 1988, 38 (09) :2869-2874

[7] ZWEIG RULE AND PI-N SIGMA TERM [J].

CHENG, TP .

PHYSICAL REVIEW D, 1976, 13 (07) :2161-2163

[8]

CHRISTOV CV, 1996, PROG PART NUCL PHYS, V37, P1

[9] pi N sigma term, (ss)over-bar in the nucleon, and the scalar form factor: A lattice study [J].

Dong, SJ ;

Lagae, JF ;

Liu, KF .

PHYSICAL REVIEW D, 1996, 54 (09) :5496-5500

[10] STOCHASTIC ESTIMATION WITH Z2 NOISE [J].

DONG, SJ ;

LIU, KF .

PHYSICS LETTERS B, 1994, 328 (1-2) :130-136

← 1 2 3 4 →