SU(3)-breaking corrections to the hyperon vector coupling<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>f</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>0</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>in covariant baryon chiral perturbation theory

Geng, L. S.; Camalich, J. Martin; Vacas, M. J. Vicente

doi:10.1103/physrevd.79.094022

Cited by 40 publications

(54 citation statements)

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“…Recently, it has been shown that a successful study of hyperon phenomenology can be achieved using the covariant approach of SU(3)-BχPT [18]. Examples include the description of the baryon-octet magnetic moments [19,20] the analysis of the semileptonic hyperon decays [18,21] and the prediction of the magnetic dipole moments and electromagnetic structure of the decuplet resonances [22]. The power counting is restored [11] using the so-called extended-onmass-shell (EOMS) renormalization scheme [23] and the contributions of decuplet resonances are systematically and explicitly considered [20,24].…”

Section: Introductionmentioning

confidence: 99%

Lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory

2010

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We present an analysis of the baryon-octet and -decuplet masses using covariant SU(3)-flavor chiral perturbation theory up to next-to-leading order. Besides the description of the physical masses we address the problem of the lattice QCD extrapolation. Using the PACS-CS collaboration data we show that a good description of the lattice points can be achieved at next-to-leading order with the covariant loop amplitudes and phenomenologically determined values for the meson-baryon couplings. Moreover, the extrapolation to the physical point up to this order is found to be better than the linear one given at leading-order by the Gell-Mann-Okubo approach. The importance that a reliable combination of lattice QCD and chiral perturbation theory may have for hadron phenomenology is emphasized with the prediction of the pion-baryon and strange-baryon sigma terms.

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Section: Introductionmentioning

confidence: 99%

Lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory

2010

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“…The EOMS scheme has already been successfully applied to study many physical observables such as the magnetic moments [22,[29][30][31], the masses, and sigma terms [21,[32][33][34] of the octet and decuplet baryons, the hyperon vector couplings [35,36], the axial vector charges [37], the pionnucleon scattering [38,39], the nucleon Compton scattering [40], the neutral pion photo production [41], the scattering of pseudoscalar mesons off D=B mesons [42][43][44], the DD Ã scattering [45], and the Ξ cc masses and sigma terms [46,47]. It will be interesting to see how it describes the magnetic moments of the Ξ cc baryons, particularly from the perspective of lattice QCD simulations.…”

Section: Introductionmentioning

confidence: 99%

Magnetic moments of the spin- 1/2 doubly charmed baryons in covariant baryon chiral perturbation theory

2018

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Inspired by the recent discovery of the Ξ þþ cc by the LHCb Collaboration, we study the magnetic moments of the spin-1=2 doubly charmed baryons up to the next-to-leading order in covariant baryon chiral perturbation theory with the extended-on-mass-shell renormalization scheme. There are three low energy constants at this order: a 1 , a 2 , and g a . The latest lattice QCD simulations allow us to fix a combination of a 1 and a 2 , while the axial-vector coupling g a can be determined in three different ways: by fitting to the lattice QCD data, by the quark model, or by the heavy antiquark diquark symmetry. The magnetic moments of the spin-1=2 doubly charmed baryons, Ξ d cc and Ξ s cc , can then be predicted. We compare our results with those obtained in the heavy baryon chiral perturbation theory and other approaches, and point out some inconsistencies between the lattice QCD simulations and the quark model.

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“…However, we recall that the tendency of the SU(3) breaking correction observed here disagrees predictions of both the latest baryon ChPT result [11] and large N c analysis [8].…”

Section: Hyperon Vector Form Factors With 2+1 Flavor Dynamical Domainmentioning

confidence: 38%

Hyperon vector form factors with 2+1 flavor dynamical domain-wall fermions.

Sasaki¹

2012

Proceedings of XXIX International Symposium on Lattice Field Theory — PoS(Lattice 2011)

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We report updated results of the hyperon vector form factor f 1 for Ξ 0 → Σ + and Σ − → n semileptonic decays from fully-dynamical lattice QCD. The calculations are carried out with gauge configurations generated by the RBC and UKQCD Collaborations with (2+1)-flavors of dynamical domain-wall fermions and the Iwasaki gauge action at β = 2.13, corresponding to a cutoff a −1 = 1.73 GeV. Our results, which are calculated at the lightest two sea quark masses (pion mass down to approximately 330 MeV), show that a sign of the second-order correction of SU(3) breaking on hyperon vector coupling f 1 (0) is likely negative. The tendency of the SU(3) breaking correction observed in this work disagrees predictions of both the latest baryon chiral perturbation theory result and large N c analysis.

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

Cited by 40 publications

References 23 publications

Lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory

Lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory

Magnetic moments of the spin- 1/2 doubly charmed baryons in covariant baryon chiral perturbation theory

Hyperon vector form factors with 2+1 flavor dynamical domain-wall fermions.

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