Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Zyablyuk, K."'
Autor:
Zyablyuk, K. N.
Pion structure functions are considered in the framework of QCD sum rules at the next to leading order. The 2-loop diargam, representing the gluon exchange between the struck quark and spectator, is calculated for space-like pion momentum p^2<0. Afte
Externí odkaz:
http://arxiv.org/abs/hep-ph/0505036
Autor:
Zyablyuk, K. N.
Publikováno v:
Eur.Phys.J. C38 (2004) 215-223
The difference of vector and axial-vector charged current correlators is analyzed by means of QCD sum rules. The contribution of 10-dimensional 4-quark condensates is calculated and its value is estimated within the framework of factorization hypothe
Externí odkaz:
http://arxiv.org/abs/hep-ph/0404230
Publikováno v:
Int.J.Mod.Phys. E13 (2004) 1157-1178
The antideuteron and antihelium-3 production rates at high-energy heavy ion collisions are calculated in the framework of fusion mechanism. It is supposed, that anti-p,n,d,^3He participating in the fusion are moving in the mean field of other firebal
Externí odkaz:
http://arxiv.org/abs/nucl-th/0403089
Publikováno v:
Phys.Atom.Nucl. 68 (2005) 326-331; Yad.Fiz. 68 (2005) 351-356
The antideuteron production rate at high-energy heavy ions collisions is calculated basing on the concept of anti-d formation by antinucleons which move in the mean field of the fireball constituents (mainly pions). The explicit formula is presented
Externí odkaz:
http://arxiv.org/abs/hep-ph/0302052
Autor:
Zyablyuk, K.
Publikováno v:
JHEP0301:081,2003
Charmonium sum rules for pseudoscalar 0^{-+} state eta_c(1S) are analyzed within perturbative QCD and Operator Product Expansion. The perturbative part of the pseudoscalar correlator is considered at alpha_s^2 order and the contribution of the gluon
Externí odkaz:
http://arxiv.org/abs/hep-ph/0210103
Autor:
Ioffe, B. L., Zyablyuk, K. N.
Publikováno v:
Eur.Phys.J.C27:229-241,2003
Charmonium sum rules are analyzed with the primary goal to obtain the restrictions on the value of dimension 4 gluon condensate. The moments M_n(Q^2) of the polarization operator of vector charm currents are calculated and compared with experimental
Externí odkaz:
http://arxiv.org/abs/hep-ph/0207183
Autor:
Zyablyuk, K. N.
Publikováno v:
eConf C010430 (2001) T18
2-point correlators of vector and axial currents, obtained from tau-decay data, are studied within the framework of perturbative QCD and Operator Product Expansion. Various sum rules, obtained from Borel transformation of the correlators in complex p
Externí odkaz:
http://arxiv.org/abs/hep-ph/0105346
Publikováno v:
Phys.Rev.D64:093009,2001
The thorough analysis of the ALEPH data on hadronic tau-decay is performed in the framework of QCD. The perturbative calculations are performed in 3 and 4-loop approximations. The terms of the operator product expansion (OPE) are accounted up to dime
Externí odkaz:
http://arxiv.org/abs/hep-ph/0104048
Autor:
Ioffe, B. L., Zyablyuk, K. N.
Publikováno v:
Nucl.Phys. A687 (2001) 437-453
The operator product expansion (OPE) for the difference of vector and axial current correlators is analyzed for complex values of momentum q^2. The vector and axial spectral functions, taken from hadronic tau-decay data, are treated with the help of
Externí odkaz:
http://arxiv.org/abs/hep-ph/0010089
Autor:
Zyablyuk, K.
Publikováno v:
JHEP06(2000)025
The spectral density of euclidean Dirac operator is investigated in partially quenched QCD with arbitrary quark masses. A representation of scalar and pseudoscalar correlators in terms of the spectral density is discussed. The spectral density, obtai
Externí odkaz:
http://arxiv.org/abs/hep-ph/9911300