Semileptonic decays of the light<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>J</mml:mi><mml:mi>P</mml:mi></mml:msup><mml:mo>=</mml:mo><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:msup><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:msup></mml:math>ground state baryon octet

Faessler, Amand; Gutsche, Thomas; Holstein, Barry R.; Ivanov, Mikhail A.; Körner, Jürgen; Lyubovitskij, Valery E.

doi:10.1103/physrevd.78.094005

Cited by 62 publications

(49 citation statements)

References 68 publications

(98 reference statements)

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“…In exact flavor SU (3) symmetry, the ratios of the axial-vector and vector constants g 1 /f 1 are expressed only by the two constants F and D. Similarly, those of the vector constants f 2 /f 1 are written in terms of the anomalous magnetic moments of the proton and the neutron with flavor SU (3) symmetry assumed [9]. Details of the semileptonic hyperon decay constants can be found in a review paper [9], and recent developments are described elsewhere [14][15][16][17][18]. However, the experimental data for the semileptonic hyperon decays show that the flavor SU (3) symmetry may be manifestly broken [14], and further precision data are needed, especially for the decays of Ξ 0 , Ξ − , and Ω − as listed in Table 4.…”

Section: Semileptonic Hyperon Decaysmentioning

confidence: 99%

Prospects for rare and forbidden hyperon decays at BESIII

2017

Front. Phys.

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The study of hyperon decays at the Beijing Electron Spectrometer III (BESIII) is proposed to investigate the events of $J/\psi$ decay into hyperon pairs, which provide a pristine experimental environment at the Beijing Electron--Positron Collider II. About $10^{6}$--$10^8$ hyperons, i.e., $\Lambda$, $\Sigma$, $\Xi$, and $\Omega$, will be produced in the $J/\psi$ and $\psi(2S)$ decays with the proposed data samples at BESIII. Based on these samples, the measurement sensitivity of the branching fractions of the hyperon decays is in the range of $10^{-5}$--$10^{-8}$. In addition, with the known center-of-mass energy and "tag technique," rare decays and decays with invisible final states can be probed.Comment: 8 pages, 8 tables, add more references and corrections; many typos fixe

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Section: Semileptonic Hyperon Decaysmentioning

confidence: 99%

Prospects for rare and forbidden hyperon decays at BESIII

2017

Front. Phys.

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“…The basic ingredients of the covariant quark model for baryonic three quark states prior to the implementation of confinement can be found in [1][2][3][4]. This includes a description of the structure of the Gaussian vertex factor, the choice of interpolating baryon currents as well as the compositeness condition for baryons.…”

Section: The Covariant Quark Model For Baryonsmentioning

confidence: 99%

“…In the covariant quark model the current-induced transitions between baryons are calculated from two-loop Feynman diagrams with free quark propagators in which the high energy behavior of the loop integrations is tempered by Gaussian vertex functions [1][2][3][4]. An attractive new feature has recently been added to the covariant quark model inasmuch as quark confinement has now been incorporated in an effective way, i.e.…”

Section: Introductionmentioning

confidence: 99%

Light baryons and their electromagnetic interactions in the covariant constituent quark model

et al. 2012

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We extend the confined covariant constituent quark model that was previously developed by us for mesons to the baryon sector. In our numerical calculation we use the same values for the constituent quark masses and the infrared cutoff as have been previously used in the meson sector. In a first application we describe the static properties of the proton and neutron, and the Λ-hyperon (magnetic moments and charge radii) and the behavior of the nucleon form factors at low momentum transfers. We discuss in some detail the conservation of gauge invariance of the electromagnetic transition matrix elements in the presence of a nonlocal coupling of the baryons to the three constituent quark fields.

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“…Theoretical estimates of SU(3)-breaking corrections to f 1 (0) have been performed in various frameworks, including quark models [11,12,13], large-N c fits [3], and chiral perturbation theory (ChPT) [14,15,16,17,18]. These SU(3)-breaking corrections have also been studied recently in quenched lattice QCD (LQCD) calculations for two of the four independent channels (assuming isospin symmetry): Σ − → n [19] and Ξ 0 → Σ + [20].…”

Section: Introductionmentioning

confidence: 99%

SU(3)-breaking corrections to the hyperon vector couplingf1(0)in covariant baryon chiral perturbation theory

2009

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We calculate the SU(3)-breaking corrections to the hyperon vector coupling f1(0) up to O(p 4 ) in covariant baryon chiral perturbation theory with dynamical octet and decuplet contributions. We find that the decuplet contributions are of similar or even larger size than the octet ones. Combining both, we predict positive SU(3)-breaking corrections to all the four independent f1(0)'s (assuming isospin symmetry), which are consistent, within uncertainties, with the latest results form large Nc fits, chiral quark models, and quenched lattice QCD calculations.

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Semileptonic decays of the lightJP=1/2+ground state baryon octet

Cited by 62 publications

References 68 publications

Prospects for rare and forbidden hyperon decays at BESIII

Prospects for rare and forbidden hyperon decays at BESIII

Light baryons and their electromagnetic interactions in the covariant constituent quark model

SU(3)-breaking corrections to the hyperon vector couplingf1(0)in covariant baryon chiral perturbation theory

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