The strangeness radius and magnetic moment of the nucleon revisited

被引：85

作者：

Hammer, HW ^{[1
]}

Meisner, UG ^{[1
]}

Drechsel, D ^{[1
]}

机构：

[1] UNIV BONN,INST THEORET KERNPHYS,D-53115 BONN,GERMANY

来源：

PHYSICS LETTERS B | 1996年 / 367卷 / 1-4期

关键词：

D O I：

10.1016/0370-2693(95)01409-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We update Jaffe's estimate of the strange isoscalar radius and magnetic moment of the nucleon. We make use of a recent dispersion-theoretical fit to the nucleon electromagnetic form factors and an improved description of symmetry breaking in the vector nonet. We find mu(s) = -0.24 +/- 0.03 n.m. and r(s)(2) = 0.21 +/- 0.03 fm(2). The strange formfactor F-2(s)(t) follows a dipole with a cut-off mass of 1.46 GeV, F-2(s)(t) = mu(s)(1 - t/2.14GeV(2))(-2). We also discuss the theoretical uncertainties entering this approach.

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页码：323 / 328

页数：6

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