The Reaction<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:msup><mml:mi>γ</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:mi>p</mml:mi></mml:math>and the Magnetic Dipole Moment of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>Δ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo stretchy="false">(</mml:mo><mml:mn>1232</mml:mn><mml

Kotulla, M.; Ahrens, J.; Annand, J. R. M.; Beck, R.; Caselotti, G.; Fog, L. S.; Hornidge, D.; Janssen, Stijn; Krusche, B.; McGeorge, J. C.; McGregor, Ijd; Mengel, K.; Messchendorp, J. G.; Metag, V.; Novotny, R.; Pfeiffer, M.; Rost, M.; Sack, Stefan; Sanderson, Ruth; Schadmand, S.; Watts, D. P.

doi:10.1103/physrevlett.89.272001

Cited by 104 publications

(75 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The value for the ∆ ++ is extracted from radiative pion-nucleon scattering (π + p −→ π + pγ) [9,[598][599][600], and that for the ∆ + from radiative photoproduction of neutral pions (γp −→ π 0 pγ ) [601]. Information on the ∆ 0 and ∆ − magnetic moments and all other electromagnetic properties of the ∆ isomultiplet is totally missing.…”

Section: Delta Electromagnetic Form Factorsmentioning

confidence: 99%

Baryons as relativistic three-quark bound states

Eichmann

Sanchis-Alepuz

Williams

et al. 2016

Progress in Particle and Nuclear Physics

418

530

View full text Add to dashboard Cite

We review the spectrum and electromagnetic properties of baryons described as relativistic three-quark bound states within QCD. The composite nature of baryons results in a rich excitation spectrum, whilst leading to highly non-trivial structural properties explored by the coupling to external (electromagnetic and other) currents. Both present many unsolved problems despite decades of experimental and theoretical research. We discuss the progress in these fields from a theoretical perspective, focusing on nonperturbative QCD as encoded in the functional approach via Dyson-Schwinger and Bethe-Salpeter equations. We give a systematic overview as to how results are obtained in this framework and explain technical connections to lattice QCD. We also discuss the mutual relations to the quark model, which still serves as a reference to distinguish 'expected' from 'unexpected' physics. We confront recent results on the spectrum of non-strange and strange baryons, their form factors and the issues of two-photon processes and Compton scattering determined in the DysonSchwinger framework with those of lattice QCD and the available experimental data. The general aim is to identify the underlying physical mechanisms behind the plethora of observable phenomena in terms of the underlying quark and gluon degrees of freedom.

show abstract

Section: Delta Electromagnetic Form Factorsmentioning

confidence: 99%

Baryons as relativistic three-quark bound states

Eichmann

Sanchis-Alepuz

Williams

et al. 2016

Progress in Particle and Nuclear Physics

418

530

View full text Add to dashboard Cite

show abstract

“…Comparing the results of the second row and those of the third one, we see that the effects of flavor SU (3) [25][26][27][28], the relativistic quark model [37], next-to-leading-order HBχPT [30], large Nc [33], QCD sum rules [42], the chiral quark model [38], covariant χPT [31], χPT [32] and the experimental data [13,18,19]. (45) breaking are marginal on the electric monopole form factors of the baryon decuplet, as mentioned already.…”

Section: Charge Radii Magnetic Dipole Moments Magnetic Radii Anmentioning

confidence: 99%

“…By the turn of the new century, however, being equipped with a new generation of electron beam accelerators and detectors with high precision, one was able to take a better grasp of the EM transitions of ∆ isobars [3,4]. For example, various experimental groups have announced the results on the γ * N → ∆ excitation: the Laser Electron Gamms Source (LEGS) Collaboration at the National Synchrotron Light Source (NSLS) of Brookhaven National Laboratory [5][6][7], the CLAS Collaboration [8][9][10] at Jefferson Laboratory, and the A1 and A2 Collaborations [11][12][13][14][15][16] at MAMI. The EM structure of the strangeness members of the baryon decuplet has been also experimentally investigated at these experimental facilities.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic form factors of the baryon decuplet with flavor SU(3) symmetry breaking

Kim

2019

Eur. Phys. J. C

View full text Add to dashboard Cite

We investigate the electromagnetic form factors of the baryon decuplet within the framework of the SU(3) self-consistent chiral quark-soliton model, taking into account the 1/Nc rotational corrections and the effects of flavor SU(3) symmetry breaking. We first examine the valence-and sea-quark contributions to each electromagnetic form factor of the baryon decuplet and then the effects of the flavor SU(3) symmetry breaking. The present results are in good agreement with the recent lattice data. We also compute the charge radii, the magnetic radii, the magnetic dipole moments and the electric quadrupole moments, comparing their results with those from other theoretical works. We also make a chiral extrapolation to compare the present results with the lattice data in a more quantitative manner. The results show in general similar tendency to the lattice results. In particular, the results of the M 1 and E2 form factors are in good agreement with those of lattice QCD.

show abstract

“…Presently, relatively little is known concerning the sign and the size of these moments. This information is needed to reveal further details of the current distribution in baryons beyond those available from the magnetic dipole moment [53].…”

Section: Magnetic Octupole Moments Of Baryonsmentioning

confidence: 99%