scholarly journals Heavy quark correlators in an instanton liquid model with perturbative corrections

2020 ◽  
Vol 102 (7) ◽  
Author(s):  
M. Musakhanov ◽  
N. Rakhimov ◽  
U. T. Yakhshiev
Keyword(s):  
Heavy Quark ◽  
Liquid Model ◽  
Perturbative Corrections ◽  
Instanton Liquid

scholarly journals Heavy quarkonium potential at nonzero temperature in the instanton liquid model

2019 ◽  
Vol 49 ◽  
pp. 1960003
Author(s):  
M. M. Musakhanov ◽  
N. R. Rakhimov
Keyword(s):  
Heavy Quark ◽  
Finite Temperature ◽  
Mass Formula ◽  
Heavy Quarkonium ◽  
Nonzero Temperature ◽  
Exchange Contribution ◽  
Gluon Exchange ◽  
Liquid Model ◽  
Instanton Liquid

Within the framework of the instanton Liquid Model (ILM) we evaluate the heavy quark [Formula: see text] potential at finite temperature. The potential in the ILM has two components: direct instantons contribution and the ILM modified one-gluon exchange contribution. The dynamical ”electric” mass [Formula: see text], which was generated by rescattering of the gluons from the ILM instantons, was taken into account.

scholarly journals Heavy quark potential in the instanton liquid model

1999 ◽  
Vol 73 (1-3) ◽  
pp. 512-514 ◽  
Author(s):  
R.C. Brower ◽  
D. Chen ◽  
J.W. Negele ◽  
E. Shuryak
Keyword(s):  
Heavy Quark ◽  
Liquid Model ◽  
Quark Potential ◽  
Heavy Quark Potential ◽  
Instanton Liquid

scholarly journals Perturbative corrections to a sum rule for the heavy quark kinetic energy

1997 ◽  
Vol 403 (3-4) ◽  
pp. 323-328 ◽  
Author(s):  
Hooman Davoudiasl ◽  
Adam K. Leibovich
Keyword(s):  
Kinetic Energy ◽  
Heavy Quark ◽  
Sum Rule ◽  
Perturbative Corrections

scholarly journals PERTURBATIVE CORRECTIONS TO THE SEMILEPTONIC b-DECAY MOMENTS: $E^\ell_{\rm cut}$ DEPENDENCE AND RUNNING-αs EFFECTS IN THE OPE APPROACH

2005 ◽  
Vol 20 (10) ◽  
pp. 2099-2117 ◽  
Author(s):  
NIKOLAI URALTSEV
Keyword(s):  
Heavy Quark ◽  
Structure Functions ◽  
Theoretical Uncertainty ◽  
Technical Tool ◽  
Momentum Scale ◽  
Scale Separation ◽  
Gluon Mass ◽  
Pole Type ◽  
Energy Moments ◽  
Perturbative Corrections

We have calculated the perturbative corrections to all the structure functions in the semileptonic decays of a heavy quark. Assuming an arbitrary gluon mass as a technical tool allowed to obtain in parallel all the BLM corrections. We report the basic applications, viz. perturbative corrections to the hadronic mass and energy moments with full dependence on the charge lepton energy cut. In the adopted scheme with the OPE momentum scale separation around 1 GeV the perturbative corrections to [Formula: see text] are small and practically independent of E cut ; the BLM corrections are small, too. The corrections to the second mass squared moment show some decrease with E cut consistent with the effect of the Darwin operator, within the previously estimated theoretical uncertainty. Perturbative corrections in the pole-type schemes appear significant and vary with Eℓ, decreasing the moments at higher cuts. The hardness of hadronic moments is quantitatively illustrated for different cuts on Eℓ.

scholarly journals Local chirality of low-lying Dirac eigenmodes and the instanton liquid model

2002 ◽  
Vol 66 (3) ◽  
Author(s):  
I. Horváth ◽  
S. J. Dong ◽  
T. Draper ◽  
N. Isgur ◽  
F. X. Lee ◽  
...  
Keyword(s):  
Liquid Model ◽  
Instanton Liquid

scholarly journals Next-to-leading-order QCD corrections to heavy quark fragmentation into $${}^1S^{(1,8)}_0$$ quarkonia

2021 ◽  
Vol 81 (7) ◽  
Author(s):  
Feng Feng ◽  
Yu Jia ◽  
Wen-Long Sang
Keyword(s):  
Heavy Quark ◽  
Fragmentation Function ◽  
Short Distance ◽  
Decomposition Method ◽  
Heavy Quarkonium ◽  
Leading Order ◽  
Quark Fragmentation ◽  
Definition Of ◽  
Perturbative Corrections ◽  
Operator Definition

AbstractWithin NRQCD factorization framework, in this work we compute, at the lowest order in velocity expansion, the next-to-leading-order (NLO) perturbative corrections to the short-distance coefficients associated with heavy quark fragmentation into the $${}^1S_0^{(1,8)}$$ 1 S 0 ( 1 , 8 ) components of a heavy quarkonium. Starting from the Collins and Soper’s operator definition of the quark fragmentation function, we apply the sector decomposition method to facilitate the numerical manipulation. It is found that the NLO QCD corrections have a significant impact.

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