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Strangeness magnetic form factor of the proton in the extended chiral quark model
An CS(安春生); An, CS; Saghai, B
2013
发表期刊PHYSICAL REVIEW C
卷号88期号:2页码:25206
摘要Background: Unravelling the role played by nonvalence flavors in baryons is crucial in deepening our comprehension of QCD. The strange quark, a component of the higher Fock states in baryons, is an appropriate tool to study nonperturbative mechanisms due to the pure sea quark. Purpose: Study the magnitude and the sign of the strangeness magnetic moment mu s and the magnetic form factor (G(M)(s)) of the proton. Methods: Within an extended chiral constituent quark model, we investigate contributions from all possible five-quark components to mu s andG(M)(s) (Q(2)) in the four-vector momentum range Q(2) <= 1 (GeV/c)(2). The probability of the strangeness component in the proton wave function is calculated employing the P-3(0) model. Results: Predictions are obtained by using input parameters taken from the literature. The observables mu s and G(s)M (Q(2)) are found to be small and negative, consistent with the lattice-QCD findings as well as with the latest data released by the PVA4 and HAPPEX Collaborations. Conclusions: Due to sizable cancellations among different configurations contributing to the strangeness magnetic moment of the proton, it is indispensable to (i) take into account all relevant five-quark components and include both diagonal and nondiagonal terms, (ii) handle with care the oscillator harmonic parameter omega(5) and the s (s) over bar component probability.
学科领域Physics
DOI10.1103/PhysRevC.88.025206
收录类别SCI
WOS记录号WOS:000323386100004
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224514
专题理论物理室
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An CS,An, CS,Saghai, B. Strangeness magnetic form factor of the proton in the extended chiral quark model[J]. PHYSICAL REVIEW C,2013,88(2):25206.
APA 安春生,An, CS,&Saghai, B.(2013).Strangeness magnetic form factor of the proton in the extended chiral quark model.PHYSICAL REVIEW C,88(2),25206.
MLA 安春生,et al."Strangeness magnetic form factor of the proton in the extended chiral quark model".PHYSICAL REVIEW C 88.2(2013):25206.
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