Strange magnetism in the nucleon

S. Steininger; T.R. Hemmert; Ulf-G. Mei{\ss}ner

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Strange magnetism in the nucleon

T.R. Hemmert, Ulf-G. Mei{ss}ner, S. Steininger

High Energy Physics - Phenomenology · Submitted 2 Jun 1998

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We use these limites to derive bounds on the strange magnetic moment of the proton from the recent measurement of $G_M^{(s)} (Q^2=0.1 GeV^2)$ by the SAMPLE collaboration.

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Using heavy baryon chiral perturbation theory to one loop, we derive an analytic and parameter-free expression for the momentum dependence of the strange magnetic form factor of the nucleon $G_M^{(s)} (Q^2)$ and its corresponding radius. This should be considered as a lower bound. We also derive a model-independent relation between the isoscalar magnetic and the strange magnetic form factors of the nucleon based on chiral symmetry and SU(3) only. This gives an upper bound on the strange magnetic form factor. We use these limites to derive bounds on the strange magnetic moment of the proton from the recent measurement of $G_M^{(s)} (Q^2=0.1 GeV^2)$ by the SAMPLE collaboration. We stress the relevance of this result for the on-going and future experimental programs at various electron machines.

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#	sentence	role	the authors' own work	states the main conclusion	strength
s0	Using heavy baryon chiral perturbation theory to one loop, we derive an analytic and parameter-free expression for the momentum dependence of the strange magnetic form factor of the nucleon $G_M^{(s)} (Q^2)$ and its corresponding radius.	contribution 0.88	0.96	0.21	asserted 1.00
s1	This should be considered as a lower bound.	limitation 0.61	0.55	0.09	asserted 0.84
s2	We also derive a model-independent relation between the isoscalar magnetic and the strange magnetic form factors of the nucleon based on chiral symmetry and SU(3) only.	contribution 0.59	0.96	0.18	asserted 1.00
s3	This gives an upper bound on the strange magnetic form factor.	result 0.83	0.89	0.17	asserted 0.99
s4	We use these limites to derive bounds on the strange magnetic moment of the proton from the recent measurement of $G_M^{(s)} (Q^2=0.1 GeV^2)$ by the SAMPLE collaboration.	result 0.62	0.93	0.36	asserted 1.00
s5	We stress the relevance of this result for the on-going and future experimental programs at various electron machines.	interpretation 0.79	0.25	0.06	asserted 0.90

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Original abstract

Using heavy baryon chiral perturbation theory to one loop, we derive an analytic and parameter-free expression for the momentum dependence of the strange magnetic form factor of the nucleon $G_M^{(s)} (Q^2)$ and its corresponding radius. This should be considered as a lower bound. We also derive a model-independent relation between the isoscalar magnetic and the strange magnetic form factors of the nucleon based on chiral symmetry and SU(3) only. This gives an upper bound on the strange magnetic form factor. We use these limites to derive bounds on the strange magnetic moment of the proton from the recent measurement of $G_M^{(s)} (Q^2=0.1 GeV^2)$ by the SAMPLE collaboration. We stress the relevance of this result for the on-going and future experimental programs at various electron machines.

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10 arXiv papers cite this in 11 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

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As the nucleon 2pt correlation function depends on the valence quark masses and the strange quark matrix elements depend on $m_loop$, we use a chiral extrapolation linear in $m_π$ and $m_loop=m_K$ [ref] .

Strange Quark Magnetic Moment of the Nucleon at Physical Point · Introduction · 0.97
Similarly, we calculate the strange Sachs magnetic form factor $G^s_M$ at a particular $Q^2$ using the following global fit formula gsmfit G^s_M ( m_π,m_K,m_π,vs, a , L) =A_0 + A_1 m_π+ A_2 m_K + A_3m_π,vs^2 + A_4 a^2 + A_5m_π(1-2/m_πL) e^-m_πL , where we have used a chiral extrapolation linear in $m_π$ and $m_loop=m_K$ [ref] .

Neutral Weak Form Factors of Proton and Neutron · Strange quark form factors from lattice QCD · 0.99
Similarly, we calculate the strange Sachs magnetic form factor $G^s_M$ at a particular $Q^2$ using the global fit formula gsmfit G^s_M ( m_π,m_K,m_π,vs, a , L) =A_0 + A_1 m_π+ A_2 m_K + A_3m_π,vs^2 + A_4 a^2 + A_5m_π(1-2/m_πL) e^-m_πL , where we have used a chiral extrapolation linear in $m_π$ and $m_loop=m_K$ [ref] .

Nonperturbative strange-quark sea from lattice QCD, light-front holography, and meson-baryon fluctuation models · Lattice QCD determination of the strange quark form factor · 0.99

Cites it as background 5 papers

There has been some work on strange form factors with heavy baryon chiral perturbation theory [ref] .

Strange magnetic form factor of nucleon in heavy baryon chiral effective approach at next to leading order · Introduction · 0.97
These approaches include the QCD equalities supplemented with constituent quark model assumptions [ref] , heavy baryon chiral perturbation theory [ref] , dispersive approaches [ref] , vector dominance model (VDM) [ref] , VDM with a kaon cloud contribution [ref] , the Skyrme model [ref] , the NJL model [ref] , the chiral soliton [ref] , chiral bag [ref] and chiral quark models [ref] , a two-component model with a meson cloud [ref] , etc.

Strange magnetic form factor of the proton at $Q^2 = 0.23$ GeV$^2$ · Introduction · 0.99
The dependence of the strange radii and magnetic moment on quark masses has been studied in SU(3) heavy-baryon chiral perturbation theory (ChPT) [ref] , and its partially-quenched generalization [ref] .

High-precision calculation of the strange nucleon electromagnetic form factors · Introduction · 0.96

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