Higher twist parton distributions from light-cone wave functions

Braun, Vladimir M.; Lautenschlager, Tobias; Manashov, A. N.; Pirnay, B.

doi:10.1103/physrevd.83.094023

Cited by 54 publications

(111 citation statements)

References 87 publications

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“…In Fig. 10, the twist-3 contribution to xg 2 is compared with the JAM [8] and BLMP models [33] along with the E143 experimental data [35]. Our results are comparable with theoretical and phenomenological predictions.…”

Section: Ht Contributionssupporting

confidence: 77%

“…This approach is compared with exact evolution equations for the gluon-quark-antiquark correlation in Ref. [33]. They are practically equal.…”

Section: Higher Twistmentioning

confidence: 99%

“…The BLMP model [33] made a step in developing a usable parametrization for phenomenological analysis. It constructed HT distributions from convolution integrals of the light-cone wave functions by considering a simple model based on three valence quarks and one gluon with the total zero angular momentum.…”

Section: Higher Twistmentioning

confidence: 99%

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Target mass corrections and higher twist effects in polarized deep-inelastic scattering

2014

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We perform a next-to-leading-order QCD analysis to world data on polarized structure functions g1 and g2 in a fixed-flavor number scheme. We include target mass corrections and higher twist effects in our fitting procedure and study their non-negligible effects on physically interesting quantities. Twist-3 contributions to both polarized structure functions are determined, and the accuracy of the extracted polarized parton distribution functions is improved. 3 He and 3 H polarized structure functions are described based on our fit result. Moreover, sum rules are derived and compared with available theoretical and experimental results.

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Section: Ht Contributionssupporting

confidence: 77%

“…This approach is compared with exact evolution equations for the gluon-quark-antiquark correlation in Ref. [33]. They are practically equal.…”

Section: Higher Twistmentioning

confidence: 99%

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Target mass corrections and higher twist effects in polarized deep-inelastic scattering

2014

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“…The contributions of soft gluons emitted from the c-quark and absorbed by the nucleon, demand the knowledge of the four-particle (three-quark-gluon) nucleon DA's. Their analysis has just started [26,27]. In fact, the soft-gluon contributions to OPE are The nucleon DA's at z 2 → 0 are defined according to [5]:…”

Section: Accessing the Form Factors With Hadronic Dispersion Relationsmentioning

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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“…Nevertheless, model calculations of quarkgluon-quark correlators show that chiral-even SFP functions are much smaller as compared to the SGP one [67] and might even vanish [68]. Therefore, we believe that the ansatz in (30) is suitable to obtain the maximum possible chiral-even SFP contribution to A γ N .…”

Section: Calculation Of the Unpolarized Quark-gluon-quark Correlator mentioning

confidence: 99%

Transverse single-spin asymmetries inp↑p→γXfrom quark-gluon-quark correlations in the proton

et al. 2015

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We analyze the transverse single-spin asymmetry in direct photon production from proton-proton collisions, denoted A γ N , within collinear twist-3 factorization. We provide a calculation of the contribution due to quark-gluon-quark correlations in the unpolarized proton as well as summarize previous studies on those effects in the polarized proton. Both soft-gluon poles and soft-fermion poles are considered. From this complete result we then estimate A γ N , including error bands due to uncertainties in the non-perturbative inputs, at kinematics relevant for planned measurements of this observable at the Relativistic Heavy Ion Collider. We find A γ N can allow for a "clean" extraction of the Qiu-Sterman function, which could lead to a definitive solution to the so-called "sign mismatch" crisis. Since we use the Sivers function extracted from semi-inclusive deep-inelastic scattering to develop our input for the Qiu-Sterman function, this reaction can also make a statement about the process dependence of the Sivers function.

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Higher twist parton distributions from light-cone wave functions

Cited by 54 publications

References 87 publications

Target mass corrections and higher twist effects in polarized deep-inelastic scattering

Target mass corrections and higher twist effects in polarized deep-inelastic scattering

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

Transverse single-spin asymmetries inp↑p→γXfrom quark-gluon-quark correlations in the proton

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