Hadron polarizabilities and quark models

Dattoli, G.; Matone, G.; Prosperi, D.

doi:10.1007/bf02745026

Cited by 33 publications

(18 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 we see that the former is at least two orders of magnitude lower. Furthermore, the simple quark model estimate (for more refined quark model calculations see [21][22][23][24]) of (7) is already consistent with the experimental value of (6). We see that the nucleon has -like the nuclei discussed in the previous section -a measurable and sizable magnetic polarizability.…”

Section: Nucleonic Paramagnetic Susceptibilitysupporting

confidence: 69%

See 1 more Smart Citation

On the scaling of the paramagnetic susceptibility of atoms, nuclei and nucleons

Knüpfer

Richter

1985

Z Physik A

View full text Add to dashboard Cite

The present status of the paramagnetic susceptibility of nuclei derived from measurements of magnetic dipole ground state transitions is reported. The values for nuclei are compared with corresponding values from atomic and nucleonic matter. It is found that the mean paramagnetic susceptibilities of atoms (typical values of metals are chosen for comparison), nuclei and nucleons scale with the corresponding Fermi energies.

show abstract

Section: Nucleonic Paramagnetic Susceptibilitysupporting

confidence: 69%

“…For this we have to estimate the second term on the r.h.s, of (2) and follow previous approaches [see e.g. [19][20][21]. The most prominent virtual magnetic dipole excitation of the nucleon involues the A (1232) resonance at E n-E o ~ 300 MeV above the nucleonic ground state Eo=938MeV.…”

Section: Nucleonic Paramagnetic Susceptibilitymentioning

confidence: 99%

On the scaling of the paramagnetic susceptibility of atoms, nuclei and nucleons

Knüpfer

Richter

1985

Z Physik A

View full text Add to dashboard Cite

show abstract

“…The electromagnetic polarizabilities of the nucleon have been calculated in various approaches, amongst them nonrelativistic quark- [60]- [62], MIT bag- [63] [64] and chiral quark models [65] as well as BChP T [6] [55] [66] [67]. The static polarizability is a measure for how easily an electric (magnetic) dipole moment may be induced by a constant external electric field ε (magnetic field b).…”

Section: Polarizabilitiesmentioning

confidence: 99%

Quantum corrections to baryon properties in chiral soliton models

Meier¹,

Walliser²

1997

Physics Reports

View full text Add to dashboard Cite

Chiral lagrangians as effective field theories of QCD are successfully applied to meson physics at low energies in the framework of chiral perturbation theory. Because of their nonlinear structure these lagrangians allow for static soliton solutions which may be interpreted as baryons. Their semiclassical quantization, which provides the leading order in an 1/N C expansion (N C is the number of colors) turned out to be insufficient in many cases to obtain good agreement with empirical baryon observables. However with N C = 3, large corrections are expected in the next-to-leading order which is carried by pionic fluctuations around the soliton background. The calculation of these corrections requires renormalization to 1-loop of the underlying field theory. We present a procedure to calculate the 1-loop contributions for a variety of baryonic observables. In contrast to chiral perturbation theory, terms with an arbitrary number of gradients may in principle contribute and the restriction to low chiral orders can only be justified by the investigation of the scale independence of the results. The results generally give the right sign and magnitude to reduce the discrepancy between theory and experiment with one exception: the axial quantities. These suffer from the fact that the underlying current algebra mixes different N C orders, which suggests a large and positive next-to-next-to-leading order contribution, which is probably sufficient to close the gap to experiment.

show abstract

“…At present there are many different approaches used for the description of the electromagnetic polarizabilities of hadrons: the MIT bag model [6,7], the nonrelativistic quark model [8,9,10,11,12], the chiral quark model [13,14], the chiral soliton model [15,16] and the Skyrme model [17,18]. Here we mentioned only a small part of the publications on these topics (see also review [19]).…”

Section: Introductionmentioning

confidence: 99%

Relativistic corrections to the electromagnetic polarizabilities of compound systems

2001

View full text Add to dashboard Cite

The low-energy amplitude of Compton scattering on the bound state of two charged particles of arbitrary masses, charges and spins is calculated. A case in which the bound state exists due to electromagnetic interaction (QED) is considered. The term, proportional to ω 2 , is obtained taking into account the first relativistic correction. It is shown that the complete result for this correction differs essentially from the commonly used term ∆α, proportional to the r.m.s. charge radius of the system. We propose that the same situation can take place in the more complicated case of hadrons.

show abstract

Hadron polarizabilities and quark models

Cited by 33 publications

References 19 publications

On the scaling of the paramagnetic susceptibility of atoms, nuclei and nucleons

On the scaling of the paramagnetic susceptibility of atoms, nuclei and nucleons

Quantum corrections to baryon properties in chiral soliton models

Relativistic corrections to the electromagnetic polarizabilities of compound systems

Contact Info

Product

Resources

About