A relativized quark model for radiative baryon transitions

Warns, M.; Schröder, H.; Pfeil, Walter-Josef; Rollnik, H.

doi:10.1007/bf01556275

Cited by 59 publications

(60 citation statements)

References 24 publications

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“…Our results for the decay widths in Table VII are comparable with most of the predictions presented in the literature [11][12][13][14][15]17,[20][21][22][23][24]27,65]. The exception is the result for the Á !…”

Section: Decay Widthssupporting

confidence: 91%

“…Ã decay width are in the range 150-300 keV for a large variety of quark models, algebraic models of hadron structure, Skyrme, and soliton models [11][12][13][14][15]17,[20][21][22]. Only HB PT has a window 252-540 keV [24], while the large N c limit predicts 336 AE 81 keV [27] and may overestimate the result of 300 keV, as well as the QCD sum rules with 409 keV [23].…”

Section: Decay Widthsmentioning

confidence: 99%

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Octet to decuplet electromagnetic transition in a relativistic quark model

Ramalho

Tsushima

2013

Phys. Rev. D

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We study the octet to decuplet baryon electromagnetic transitions using the covariant spectator quark model and predict the transition magnetic dipole form factors for those involving the strange baryons. Utilizing SU (3) symmetry, the valence quark contributions are supplemented by the pion cloud dressing based on the one estimated in the γ * N → ∆ reaction. Although the valence quark contributions are dominant in general, the pion cloud effects turn out to be very important to describe the experimental data. We also show that other mesons besides the pion in particular the kaon, may be relevant for some reactions such as γ * Σ + → Σ * + , based on our analysis for the radiative decay widths of the strange decuplet baryons.

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Section: Decay Widthssupporting

confidence: 91%

Section: Decay Widthsmentioning

confidence: 99%

Octet to decuplet electromagnetic transition in a relativistic quark model

Ramalho

Tsushima

2013

Phys. Rev. D

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“…The theoretical curves of Refs. [3][4][5][6]26] are based on variants of the CQM. The curve from Ref.…”

Section: Fig 5 a Plot Of Mmentioning

confidence: 99%

Electroproduction of theS11(1535)resonance at high momentum transfer

Armstrong

Stoler²,

Adams

1999

Phys. Rev. D

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The differential cross section for the process p(e, e ′ p)η has been measured at Q 2 = 2.4 and 3.6 (GeV/c) 2 at center-ofmass energies encompassing the S11(1535) resonance. The latter point is the highest-Q 2 exclusive measurement of this process to date. The resonance width and the helicity-1/2 transition amplitude are extracted from the data, and evidence for the possible onset of scaling in this reaction is shown. A lower bound of ≈ 0.45 is placed on the S11(1535) → p η branching fraction.

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“…However, detailed properties concerning the ηNN * couplings and even the ηNN coupling still could not be well-constrained at that time, including the total decay width of the dominant S 11 (1535), and its branching ratio into ηN. Such a situation somehow stalked theoretical progresses due to lack of constrained inputs for the modellings, although various QCD inspired phenomenologies, such as the quark model approaches [6,[12][13][14]8], and formalisms based on the meson-nucleon degrees of freedom using isobaric descriptions [7,9,11], or multipole analyses [5,10], were proposed to investigate the roles played by the intermediate resonances in the η photoproduction.…”

Section: Introductionmentioning

confidence: 99%

Quark model approach to the $\eta$ meson electroproduction on the proton

Zhao

Saghai

2002

J. Phys. G: Nucl. Part. Phys.

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A recently developed quark model approach to pseudoscalar meson photoproduction is extended to electroproduction process for the η meson in the kinematics of momentum transfer Q 2 ≤ 4 (GeV/c) 2 and total center of mass energy W ≤ 1.6 GeV. Existing data are well reproduced and the roles of the S 11 (1535) and D 13 (1520) resonances are closely investigated. In the study of the longitudinal excitation of the S 11 (1535) resonance, a reliable constraint on the S 11 (1535) properties is obtained by cleanly removing the electromagnetic transition from the γ (v) p → S 11 (1535) → ηp amplitude. Thus, the fitted quantities can be determined with an uncertainty of about 15%. This could be the first direct constraint on the S 11 (1535) properties in theory.

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A relativized quark model for radiative baryon transitions

Cited by 59 publications

References 24 publications

Octet to decuplet electromagnetic transition in a relativistic quark model

Octet to decuplet electromagnetic transition in a relativistic quark model

Electroproduction of theS11(1535)resonance at high momentum transfer

Quark model approach to the $\eta$ meson electroproduction on the proton

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