Improved light-cone sum rules for the electromagnetic form factors of the nucleon

Lenz, Alexander; Wittmann, Markus; Stein, Eckart

doi:10.1016/j.physletb.2003.12.009

Cited by 52 publications

(29 citation statements)

References 40 publications

(88 reference statements)

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“…This article is a complement to the previous ones and we aim to present the explicit expressions of the light-cone distribution amplitudes of the baryon in the approach of conformal spin expansion [42][43][44][45][46][47][48] to the next-to-leading order. In comparison with the nucleon or the and baryon [40,49], has isospin 0, which makes it lose the symmetry relationships from the identity of the quarks.…”

Section: Introductionmentioning

confidence: 99%

Higher order light-cone distribution amplitudes of the Lambda baryon

2014

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The improved light-cone distribution amplitudes (LCDAs) of the baryon are examined on the basis of the QCD conformal partial wave expansion approach. The calculations are carried out to the next-to-leading order of conformal spin accuracy with consideration of twist 6. The next leading order conformal expansion coefficients are related to the nonperturbative parameters defined by the local threequark operator matrix elements with different Lorentz structures with a covariant derivative. The nonperturbative parameters are determined with the QCD sum rule method. The explicit expressions of the LCDAs are provided as the main results.

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Section: Introductionmentioning

confidence: 99%

Higher order light-cone distribution amplitudes of the Lambda baryon

2014

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“…The latter have been worked out in [5,6]. This approach was applied to the nucleon electromagnetic form factors [7,8,9], where the second nucleon in the correlation function was interpolated with the three-quark current e.g., with the Ioffe current [10]. In order to access heavy baryons, e.g., Λ c or Λ b , one has to use a three-quark current with one heavy c or b quark.…”

Section: Introductionmentioning

confidence: 99%

Form factors and strong couplings of heavy baryons from QCD light-cone sum rules

Khodjamirian

Klein

Mannel

et al. 2011

J. High Energ. Phys.

135

136

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We derive QCD light-cone sum rules for the hadronic matrix elements of the heavy baryon transitions to nucleon. In the correlation functions the Λ c , Σ c and Λ b -baryons are interpolated by three-quark currents and the nucleon distribution amplitudes are used. To eliminate the contributions of negative parity heavy baryons, we combine the sum rules obtained from different kinematical structures. The results are then less sensitive to the choice of the interpolating current. We predict the Λ b → p form factor and calculate the widths of the Λ b → pℓν l and Λ b → pπ decays. Furthermore, we consider double dispersion relations for the same correlation functions and derive the light-cone sum rules for the Λ c N D ( * ) and Σ c N D ( * ) strong couplings. Their predicted values can be used in the models of charm production in pp collisions.

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“…The reason why we also consider higher-twist DAs is that they enter the calculation of the helicity-violating Pauli form factor of the nucleon in perturbative QCD [24] and also the calculation of the soft (end point) corrections to the form factors in the framework of the light-cone sum rule approach [25,26]. Their knowledge is imperative for a QCD description of exclusive reactions in the JLAB energy range.…”

Section: Introductionmentioning

confidence: 99%

Nucleon distribution amplitudes and proton decay matrix elements on the lattice

et al. 2009

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Improved light-cone sum rules for the electromagnetic form factors of the nucleon

Cited by 52 publications

References 40 publications

Higher order light-cone distribution amplitudes of the Lambda baryon

Higher order light-cone distribution amplitudes of the Lambda baryon

Form factors and strong couplings of heavy baryons from QCD light-cone sum rules

Nucleon distribution amplitudes and proton decay matrix elements on the lattice

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