Nucleon spin structure and perturbative QCD frontier on the move

Pasechnik, Roman; Shirkov, D. V.; Teryaev, Oleg; Solovtsova, O. P.; Khandramai, V. L.

doi:10.1103/physrevd.81.016010

Cited by 66 publications

(61 citation statements)

References 98 publications

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“…and by Soffer, Pasechnik et al [124,128,129], which reproduce the data, at least qualitatively, quite well.…”

Section: G Moments Of G Psupporting

confidence: 73%

“…The filled blue circles are the full integral from x = 0.001 → 1, excluding the elastic region. The curves show phenomenological parametrizations by Burkert and Ioffe [122,123] (magenta) and Pasechnik et al [124] (cyan). The limiting cases of large Q 2 ("DIS limit") and Q 2 → 0 ("GDH slope") are also shown, as well as two bands showing χ PT calculations (Lensky et al [125] and Meissner et al [126]).…”

Section: Higher Twist Analysismentioning

confidence: 99%

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Determination of the proton spin structure functions for 0.05<Q2<5GeV2 using CLAS

Fersch¹,

Guler²,

Bosted³

et al. 2017

Phys. Rev. C

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We present the results of our final analysis of the full data set of g p 1 (Q 2 ), the spin structure function of the proton, collected using CLAS at Jefferson Laboratory in [2000][2001] We compare our final results with various theoretical models and expectations, as well as with parametrizations of the world data. Our data, with their precision and dense kinematic coverage, are able to constrain fits of polarized parton distributions, test pQCD predictions for quark polarizations at large x, offer a better understanding of quark-hadron duality, and provide more precise values of higher twist matrix elements in the framework of the operator product expansion.

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“…and by Soffer, Pasechnik et al [124,128,129], which reproduce the data, at least qualitatively, quite well.…”

Section: G Moments Of G Psupporting

confidence: 73%

Section: Higher Twist Analysismentioning

confidence: 99%

Determination of the proton spin structure functions for 0.05<Q2<5GeV2 using CLAS

Fersch¹,

Guler²,

Bosted³

et al. 2017

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…The HT effects become essential in the small/moderate Q 2 region; see the analysis of its impact for BSR in [25]. In our analysis Q 2 is of the order of a few GeV 2 and the HT impact is visible, which is shown in Fig.…”

Section: Practical Analysis Of Datamentioning

confidence: 63%

“…In Fig. 8, we present 1σ error ellipse for two adjusted fit parameters: Λ qcd = 311 ± /M 2 = −0.05 ± 0.02 [25], [6].…”

Section: Practical Analysis Of Datamentioning

confidence: 99%

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Cut moments approach in the analysis of DIS data

Kotlorz

Михайлов²,

Teryaev³

et al. 2017

Phys. Rev. D

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We review the main results on the generalization of the DGLAP evolution equations within the cut Mellin moments (CMM) approach, which allows one to overcome the problem of kinematic constraints in Bjorken x. CMM obtained by multiple integrations as well as multiple differentiations of the original parton distribution also satisfy the DGLAP equations with the simply transformed evolution kernel. The CMM approach provides novel tools to test QCD; here we present one of them. Using appropriate classes of CMM, we construct the generalized Bjorken sum rule that allows us to determine the Bjorken sum rule value from the experimental data in a restricted kinematic range of x. We apply our analysis to COMPASS data on the spin structure function g1.

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Small-x Behavior of Non-singlet Spin Structure Function and Bjorken Sum Rule with pQCD Correction up to NNLO and Higher Twist Correction

Nath¹,

Sarma²

2017

Int J Theor Phys

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A calculation of the non-singlet part of spin dependent structure function, xg N S 1 (x, Q 2 ) and associated sum rule, the Bjorken Sum rule up to next-next-to-leading order(NNLO) is presented. We use a unified approach incorporating Regge theory and the theoretical framework of perturbative Quantum Chromodynamics. Using a Regge behaved model with Q 2 dependent intercept as the initial input, we have solved the Dokshitzer-GribovLipatov-Altarelli-Parisi (DGLAP) evolution equation up to NNLO at small-2 ) and the solutions are utilised to calculate the polarised Bjorken sum rule(BSR). We have also extracted the higher twist contribution to BSR based on a simple parametrisation. These results for both of xg2 ) and BSR, along with higher twist corrections are observed to be consistent with the available data taken from SMC, E143, HERMES, COM-PASS and JLab experiments. In addition, our results are also compared with that of other theoretical and phenomenological analysis based on different models and a very good agreement is also observed in this regard. Further a very good consistency between our calculated results and theoretical QCD predictions of BSR is also achieved.

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Nucleon spin structure and perturbative QCD frontier on the move

Cited by 66 publications

References 98 publications

Determination of the proton spin structure functions for 0.05<Q2<5GeV2 using CLAS

Determination of the proton spin structure functions for 0.05<Q2<5GeV2 using CLAS

Cut moments approach in the analysis of DIS data

Small-x Behavior of Non-singlet Spin Structure Function and Bjorken Sum Rule with pQCD Correction up to NNLO and Higher Twist Correction

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