Next-to-leading order perturbative QCD corrections to baryon correlators in matter

Groote, S.; Körner, J. G.; Пивоваров, А. А.

doi:10.1103/physrevd.78.034039

Cited by 12 publications

(13 citation statements)

References 51 publications

(45 reference statements)

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“…The radiative corrections to the vector condensate calculated recently in [128] appeared to be rather large. Thus we have to analyze the role of the radiative corrections more carefully.…”

Section: Radiative Correctionsmentioning

confidence: 97%

A new approach to physics of nuclei

2012

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We employ the QCD sum rules method for description of nucleons in nuclear matter. We show that this approach provides a consistent formalism for solving various problems of nuclear physics. Such nucleon characteristics as the Dirac effective mass m * and the vector self-energy Σ V are expressed in terms of the in-medium values of QCD condensates. The values of these parameters at saturation density and the dependence on the baryon density and on the neutron-to-proton density ratio is in agreement with the results, obtained by conventional nuclear physics methods. The contributions to m * and Σ V are related to observables and do not require phenomenological parameters. The scalar interaction is shown to be determined by the pion-nucleon σ term. The nonlinear behavior of the scalar condensate may appear to provide a possible mechanism of the saturation. The approach provided reasonable results for renormalization of the axial coupling constant, for the contribution of the strong interactions to the neutron-proton mass difference and for the behavior of the structure functions of the in-medium nucleon. The approach enables to solve the problems which are difficult or unaccessible for conventional nuclear physics methods. The method provides guidelines for building the nuclear forces. The three-body interactions emerge within the method in a natural way. Their rigorous calculation will be possible in the framework of self-consistent calculation in nuclear matter of the scalar condensate and of the nucleon effective mass m * .

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“…The radiative corrections to the vector condensate calculated recently in [128] appeared to be rather large. Thus we have to analyze the role of the radiative corrections more carefully.…”

Section: Radiative Correctionsmentioning

confidence: 97%

A new approach to physics of nuclei

2012

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“…More recently, perturbative corrections to the Wilson coefficient of the dimension 3 vector condensate (which vanishes in vacuum, but is non-zero at finite density) were obtained in Ref. [62].…”

Section: Baryonic Correlatorsmentioning

confidence: 99%

Recent progress in QCD condensate evaluations and sum rules

Gubler

Satow

2019

Progress in Particle and Nuclear Physics

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We review the recent status of the QCD sum rule approach to study the properties of hadrons in vacuum and in hot or dense matter. Special focus is laid on the progress made in the evaluation of the QCD condensates, which are the input of all QCD sum rule calculations, and for which much new information has become available through high precision lattice QCD calculations, chiral perturbation theory and experimental measurements. Furthermore, we critically examine common analysis methods for QCD sum rules and contrast them with potential alternative strategies. The status of QCD sum rule studies investigating the modification of hadrons at finite density as well as recent derivations of exact sum rules applicable to finite temperature spectral functions, are also reviewed.

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“…( 63) is given, for instance, in [18]. Including, furthermore, the α s corrections [21][22][23] and the dimension-eight contributions [24], it can be summarized as follows:…”

Section: Ope For the Protonmentioning

confidence: 99%

New determination ofST⟨N|q¯DμDνq|
Gubler
¹
,
Jeong
²
,
Lee
³

2015
Phys. Rev. D
18
0
15
0
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The symmetric and traceless part of the matrix element ST N|qD µ D ν q|N can be determined from the second moment of the twist-3 parton distribution function e(x). Recently, novel experimental data on e(x) have become available, which enables us to evaluate the magnitude of the above matrix element with considerably reduced systematic uncertainties. Based on the new experimental data, we show that ST N|qD µ D ν q|N is likely to be at least an order of magnitude smaller than what previous model-based estimates have so far suggested. We discuss the consequences of this observation for the analysis of deep inelastic scattering and QCD sum rules studies at finite density for the vector meson and the nucleon, in which this matrix element is being used as an input parameter. * pgubler@riken.jp 1

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Next-to-leading order perturbative QCD corrections to baryon correlators in matter

Cited by 12 publications

References 51 publications

A new approach to physics of nuclei

A new approach to physics of nuclei

Recent progress in QCD condensate evaluations and sum rules

New determination ofST⟨N|q¯DμDνq|
Gubler
¹
,
Jeong
²
,
Lee
³

2015
Phys. Rev. D
18
0
15
0
View full text Add to dashboard Cite

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Next-to-leading order perturbative QCD corrections to baryon correlators in matter

Cited by 12 publications

References 51 publications

A new approach to physics of nuclei

A new approach to physics of nuclei

Recent progress in QCD condensate evaluations and sum rules

New determination ofST⟨N|q¯DμDνq|Gubler1, Jeong2, Lee3 2015Phys. Rev. D180150View full textAdd to dashboardCite

Contact Info

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About

New determination ofST⟨N|q¯DμDνq|
Gubler
¹
,
Jeong
²
,
Lee
³

2015
Phys. Rev. D
18
0
15
0
View full text Add to dashboard Cite