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Results 1 - 10
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326
THE STRANGENESS RADIUS AND MAGNETIC MOMENT OF THE NUCLEON REVISITED #1
, 1995
"... 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 µs = −0.24 ± 0.03 n.m. and r2 s ..."
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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 µs = −0.24 ± 0.03 n.m. and r2
STRANGE MAGNETISM
, 1998
"... We present an analytic and parameter-free expression for the momentum dependence of the strange magnetic form factor of the nucleon G (s) M (Q2) and its corresponding radius which has been derived in Heavy Baryon Chiral Perturbation Theory. We also discuss a model-independent relation between the is ..."
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We present an analytic and parameter-free expression for the momentum dependence of the strange magnetic form factor of the nucleon G (s) M (Q2) and its corresponding radius which has been derived in Heavy Baryon Chiral Perturbation Theory. We also discuss a model-independent relation between
Just How Strange? Loops, Poles and the Strangeness Radius of the Nucleon
, 1993
"... We consider a simple model for the strangeness radius of the nucleon. The model is based on vector meson dominance (VMD) and ω −φ mixing in addition to a kaon cloud contribution. We find that the VMD contribution is similar in magnitude and of the same sign as the kaon contribution to the Sachs stra ..."
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picture: the entire contribution to the matrix elements 〈N|sγµs|N 〉 was attributed to the kaon cloud of the nucleon and estimated in a one-loop calculation. This calculation was intended to complement Jaffe’s model [2], where the strangeness radius (and magnetic moment) is obtained by using a 3-pole fit
LATTICE CALCULATION OF THE GLUON PROPAGATOR AND THE STRANGENESS MAGNETIC MOMENT OF THE NUCLEON
, 1998
"... This contribution summarizes a presentation combining two topics in lattice QCD. Firstly, the gluon propagator in Landau gauge is calculated in quenched QCD on a large (323 × 64) lattice at β = 6.0. New structure seen in the infrared region survives conservative cuts to the lattice data, and serves ..."
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to exclude a number of models that have appeared in the literature. Secondly, I report on a recent lattice QCD calculation of the strangeness magnetic moment of the nucleon. The result is Gs M (0) = −0.36 ± 0.20. The strangeness Sachs electric mean-square radius 〈r2 s 〉E was also found to be small
KN Scattering and the Nucleon Strangeness Radius
, 1997
"... The leading non-zero electric moment of the nucleon strange-quark vector 〉. We evaluate the lightest current is the mean square strangeness radius, 〈r2 s OZI-allowed contribution to 〈r2 s〉, arising from the kaon cloud, using dispersion relations. Drawing upon unitarity constraints as well as K + N s ..."
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The leading non-zero electric moment of the nucleon strange-quark vector 〉. We evaluate the lightest current is the mean square strangeness radius, 〈r2 s OZI-allowed contribution to 〈r2 s〉, arising from the kaon cloud, using dispersion relations. Drawing upon unitarity constraints as well as K + N
Strangeness in the Nucleon on the Light-Cone
, 1996
"... Strange matrix elements of the nucleon are calculated within the light-cone formulation of the meson cloud model. The Q 2 dependence of the strange vector and axial vector form factors is computed, and the strangeness radius and magnetic moment extracted, both of which are found to be very small and ..."
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Strange matrix elements of the nucleon are calculated within the light-cone formulation of the meson cloud model. The Q 2 dependence of the strange vector and axial vector form factors is computed, and the strangeness radius and magnetic moment extracted, both of which are found to be very small
Strangeness in the proton and N ∗ (1535)
, 2006
"... The newest progress on the study of the strangeness in the proton and in the lowest negative parity nucleon excited state N ∗ (1535) is reviewed. Implications on the internal quark structure of the proton, N ∗ (1535) and other baryons are discussed. The diquark cluster picture for the 5-quark compon ..."
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components in baryons gives a natural explanation not only to the empirical indications for a positive strangeness magnetic moment µs and positive strangeness radius of the proton but also the longstanding mass-reverse problem
hep-ph/9712483 Lattice Calculation of the Strangeness Magnetic
, 1997
"... We report on a lattice QCD calculation of the strangeness magnetic moment of the nucleon. Our result is Gs M (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 ..."
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We report on a lattice QCD calculation of the strangeness magnetic moment of the nucleon. Our result is Gs M (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
The Strange Magnetic Moment of the Proton in the Chiral Quark Model
, 1998
"... Abstract. The strange magnetic moment of the proton is small in the chiral quark model, because of a near cancellation between the quantum fluctuations that involve kaons and s-quarks and loops that involve radiative transitions between strange vector mesons and kaons. 1 ..."
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Abstract. The strange magnetic moment of the proton is small in the chiral quark model, because of a near cancellation between the quantum fluctuations that involve kaons and s-quarks and loops that involve radiative transitions between strange vector mesons and kaons. 1
Results 1 - 10
of
326
