Octet-baryon axial-vector charges and SU(3)-breaking effects in the semileptonic hyperon decays

Abstract

The octet-baryon axial-vector charges and the g1/f1 ratios measured in the semileptonic hyperon decays are studied up to O(p^3) using the covariant baryon chiral perturbation theory with explicit decuplet contributions. We clarify the role of different low-energy constants and find a good convergence for the chiral expansion of the axial-vector charges of the baryon octet, g1(0), with O(p^3) corrections typically around 20% of the leading ones. This is a consequence of strong cancellations between different next-to-leading order terms. We show that considering only non-analytic terms is not enough and that analytic terms appearing at the same chiral order play an important role in this description. The same effects still hold for the chiral extrapolation of the axial-vector charges and result in a rather mild quark-mass dependence. As a result, we report a determination of the leading order chiral couplings, D=0.623(61)(17) and F=0.441(47)(2), as obtained from a completely consistent chiral analysis up to O(p^3). Furthermore, we note that the appearance of an unknown low-energy constant precludes the extraction of the proton octet-charge from semileptonic decay data alone, which is relevant for an analysis of the composition of the proton spin.

arXiv comment18 pages, 5 figures

References in corpus (38)

• The Spin Structure of the Nucleon
• The 1/N Expansion for Baryons
• Electromagnetic excitation of the Delta(1232)-resonance
• Renormalization of relativistic baryon chiral perturbation theory and power counting
• Baryon Chiral Perturbation Theory in Manifestly Lorentz Invariant Form
• Baryon-Pion Couplings from Large-N QCD
• Spin-Flavor Structure of Large N Baryons
• Matching Heavy Particle Approach to Relativistic Theory
• Quantization of an interacting spin-3/2 field and the Delta isobar
• Semileptonic Hyperon Decays
• Field theory of nucleon to higher-spin baryon transitions
• The nucleon axial charge from lattice QCD with controlled errors
• Systematic 1/M Expansion for Spin 3/2 Particles
• Leading SU(3)-breaking corrections to the baryon magnetic moments in Chiral Perturbation Theory
• Correspondence of consistent and inconsistent spin-3/2 couplings via the equivalence theorem
• Improved description of the $\pi N$-scattering phenomenology in covariant baryon chiral perturbation theory
• Octet baryon masses in next-to-next-to-next-to-leading order covariant baryon chiral perturbation theory
• Strangeness Contribution to the Proton Spin from Lattice QCD
• Strange quark contributions to nucleon mass and spin from lattice QCD
• Meson-Baryon Effective Chiral Lagrangians to O(q^3)
• The lowest-lying baryon masses in covariant SU(3)-flavor chiral perturbation theory
• SU(3) Breaking in Neutral Current Axial Matrix Elements and the Spin Content of the Nucleon
• First Calculation of Hyperon Axial Couplings from Lattice QCD
• Recent developments in SU(3) covariant baryon chiral perturbation theory
• On the chiral effective meson-baryon Lagrangian at third order
• The nucleon and Delta(1232) form factors at low momentum-transfer and small pion masses
• Leading-order decuplet contributions to the baryon magnetic moments in Chiral Perturbation Theory
• On the structure of large N cancellations in baryon chiral perturbation theory
• SU(3)-breaking corrections to the hyperon vector coupling $f_1(0)$ in covariant baryon chiral perturbation theory
• Recoil Order Chiral Corrections to Baryon Octet Axial Currents
• First Measurement of Form Factors of the Decay Xi0->Sigma+ e- anti-nu/e
• Baryon Masses and Axial Couplings in the Combined 1/Nc and Chiral Expansions
• Virtual decuplet effects on octet baryon masses in covariant baryon chiral perturbation theory
• Measurement of the branching ratios of the decays Xi0 --> Sigma+ e- nubar and anti-Xi0 --> anti-Sigma+ e+ nu
• Hyperon vector form factor from 2+1 flavor lattice QCD
• Renormalization of the baryon axial vector current in large-N_c chiral perturbation theory: Effects of the decuplet-octet mass difference and flavor symmetry breaking
• Chiral extrapolation and finite-volume dependence of the hyperon vector couplings
• A dispersion relation for the pion-mass dependence of hadron properties

Cited by in corpus (57)

• Quark Flavor Phenomenology of the QCD Axion
• Up, down, and strange nucleon axial form factors from lattice QCD
• Global Effective-Field-Theory analysis of New-Physics effects in (semi)leptonic kaon decays
• Prospects for rare and forbidden hyperon decays at BESIII
• Light-cone distribution amplitudes of octet baryons from lattice QCD
• The electromagnetic Sigma-to-Lambda hyperon transition form factors at low energies
• Non-standard semileptonic hyperon decays
• Hyperon Semileptonic decay constants with flavor SU(3) symmetry breaking
• Extraction of nucleon axial charge and radius from lattice QCD results using baryon chiral perturbation theory
• Magnetic moments of the spin-1/2 doubly charmed baryons in covariant baryon chiral perturbation theory
• Covariant chiral nucleon-nucleon contact Lagrangian up to order $\mathcal{O}(q^4)$
• Octet baryon isovector charges from $N_f=2+1$ lattice QCD
• Nucleon form factors in dispersively improved Chiral Effective Field Theory I: Scalar form factor
• Axial form factors of the octet baryons in a covariant quark model
• Magnetic moments of the spin-1/2 singly charmed baryons in covariant baryon chiral perturbation theory
• The relativistic chiral Lagrangian for decuplet and octet baryons at next-to-leading order
• Parton distributions from nonlocal chiral SU(3) effective theory. I. Splitting functions
• Peripheral transverse densities of the baryon octet from chiral effective field theory and dispersion analysis
• CP-violating decays of the pseudoscalars eta and eta' and their connection to the electric dipole moment of the neutron
• Strong decays of the hadronic molecule ${\Omega }^{\ast }(2012)$
• The electromagnetic form factors of the transition from the spin-3/2 Sigma to the Lambda hyperon
• The magnetic moments and electromagnetic form factors of the decuplet baryons in chiral perturbation theory
• Octet baryon magnetic moments at next-to-next-to-leading order in covariant chiral perturbation theory
• Leading order mesonic and baryonic SU(3) low energy constants from $N_f=3$ lattice QCD
• New physics in $s\to d$ semileptonic transitions: rare hyperon vs. kaon decays
• Contact interaction analysis of octet baryon axialvector and pseudoscalar form factors
• Pion photoproduction off nucleons in covariant chiral perturbation theory
• $\Delta (1232)$ resonance in the $\vec{\gamma }p\to p{\pi }^0$ reaction at threshold
• Hyperon semileptonic decays in QCD sum rules
• Systematic study of octet-baryon electromagnetic form factors in covariant chiral perturbation theory
• Gravitational form factors of hyperons in light-cone QCD
• Axial-vector form factors of the baryon octet and chiral symmetry
• Threshold pion electro- and photoproduction off nucleons in covariant chiral perturbation theory
• Deuteron EDM induced by CP violating couplings of pseudoscalar mesons
• Generalized parton distributions of sea quarks in the proton from nonlocal chiral effective theory
• Hyperon forward spin polarizability gamma0 in baryon chiral perturbation theory
• Renormalisation of the low-energy constants of chiral perturbation theory from loops with dynamical vector mesons
• Baryon number violation involving tau leptons
• The electromagnetic Sigma-to-Lambda transition form factors with coupled-channel effects in the space-like region
• Updated determination of light-cone distribution amplitudes of octet baryons in lattice QCD
• Weak interaction axial form factors of the octet baryons in nuclear medium
• Low-energy axial-vector transitions from decuplet to octet baryons
• Axial transition form factors of octet baryons in the perturbative chiral quark model
• Investigations on the flavor-dependent axial charges of the octet baryons
• Hyperon production in quasielastic ${\bar{\nu }}_{\tau }-$nucleon scattering
• Octet and decuplet baryon self-energies in relativistic SU(3) chiral effective theory
• Chiral Analysis of the Nucleon Mass and Sigma Commutator
• Transverse densities of octet baryons from chiral effective field theory
• A model independent method for quantitative estimation of $SU(3)$ flavor symmetry breaking using Dalitz plot
• Non-Perturbative Theory of Dispersion Interactions
• New Physics Searches at Kaon and Hyperon Factories
• The isoscalar octet axial form factor of the nucleon from lattice QCD
• Baryons and baryoniums in the perspective of QCD sum rules
• Nucleon parton distributions from hadronic quantum fluctuations
• The Strange Physics of Dark Baryons
• Threshold Neutral Pion Photoproduction on the Proton
• Measurements of the Absolute Branching Fraction of the Semileptonic Decay ${\mathbf{\Xi }}^{-}\to \mathbf{\Lambda }{\mathbf{e}}^{-}{\bar{\nu }}_{\mathbf{e}}$ and the Axial Charge of the ${\mathbf{\Xi }}^{-}$