Analyzing power in pion-proton bremsstrahlung, and the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>Δ</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mn /><mml:mo>(</mml:mo><mml:mn>1232</mml:mn><mml:mo>)</mml:mo><mml:mn /></mml:math>magnetic moment

Bosshard, A.; Amsler, C.; Döbeli, M.; Doser, M.; Schaad, M. W.; Riedlberger, J.; Truöl, P.; Bistirlich, J.; Crowe, K.; Ljungfelt, S.; Meyer, C. A.; Brandt, B. van den; Konter, J.A.; Mango, S.; Renker, D.; Loude, J.-F.; Perroud, J. P.; Haddock, R. P.; Sober, D. I.

doi:10.1103/physrevd.44.1962

Cited by 87 publications

(83 citation statements)

References 22 publications

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“…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

436

530

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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.

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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

436

530

View full text Add to dashboard Cite

show abstract

“…The effective Lagrangian of the ∆(1232) resonance 1 µ N denotes the nuclear magneton e/(2m p ). 2 Here, p stands for small parameters of the theory like the pion mass and the ∆-nucleon mass difference.…”

Section: Effective Lagrangianmentioning

confidence: 99%

“…The magnetic moment of the ∆ ++ (1232) has been investigated experimentally by measuring the π + p bremsstrahlung reaction [1,2] which has been analyzed within various theoretical frameworks [3,4,5,6,7]. The Particle Data Group only makes a rough estimate of the range the moment is expected to lie within, µ ∆ ++ = (3.7 − 7.5) µ N [8], 1 while SU(6) symmetry predicts for a member of the decuplet with charge eQ the value µ = Qµ p (µ p : proton magnetic moment) [9], resulting for the ∆ ++ in µ ∆ ++ = 5.58 µ N .…”

Section: Introductionmentioning

confidence: 99%

Magnetic dipole moment of the Δ(1232) in chiral perturbation theory

et al. 2006

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The magnetic dipole moment of the ∆(1232) is calculated in the framework of manifestly Lorentzinvariant baryon chiral perturbation theory in combination with the extended on-mass-shell renormalization scheme. As in the case of the nucleon, at leading order both isoscalar and isovector anomalous magnetic moments are given in terms of two low-energy constants. In contrast to the nucleon case, at next-to-leading order the isoscalar anomalous magnetic moment receives a (real) loop contribution. Moreover, due to the unstable nature of the ∆(1232), at next-to-leading order the isovector anomalous magnetic moment not only receives a real but also an imaginary loop contribution.

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“…For the ∆ ++ (1232), it was therefore proposed to measure its MDM through the π + p → γπ + p reaction [14], and two experiments were performed [15,16]. Using different theoretical analyses, the Particle Data Group (PDG) [17] quotes as range of the MDM : µ ∆ ++ = 3.7 − 7.5 µ N , where µ N is the nuclear magneton.…”

Section: Introductionmentioning

confidence: 99%

Magnetic dipole moment of the S11(1535) from the γp→γηp reaction

et al. 2003

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The γp → γηp reaction in the S 11 (1535) resonance region is investigated as a method to access the S 11 (1535) magnetic dipole moment. To study the feasibility, we perform calculations of the γp → γηp process within an effective Lagrangian approach containing both the S 11 resonant mechanism and a background of non-resonant contributions. Predictions are made for the forthcoming experiments. In particular, we focus on the sensitivity of cross sections and photon asymmetries to the S 11 (1535) magnetic dipole moment.

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Analyzing power in pion-proton bremsstrahlung, and theΔ++(1232)magnetic moment

Cited by 87 publications

References 22 publications

Baryons as relativistic three-quark bound states

Baryons as relativistic three-quark bound states

Magnetic dipole moment of the Δ(1232) in chiral perturbation theory

Magnetic dipole moment of the S11(1535) from the γp→γηp reaction

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