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76 papers · 2 filters
Polarized strangeness in the nucleon
M. G. Sapozhnikov
A large violation of the Okubo-Zweig-Iizuka rule was discovered in the annihilation of stopped antiprotons. The explanation of these experimental data is discussed in the framework…
Strong Decays of Scalar Glueball in a Scale-Invariant Chiral Quark Model
M. K. Volkov, V. L. Yudichev
An effective meson Lagrangian including a scalar glueball is constructed on the base of chiral symmetry. The glueball is introduced into the meson Lagrangian by u…
Analytic Perturbation Theory for QCD observables
D. V. Shirkov
The connection between ghost-free formulations of RG-invariant perturbation theory in the both Euclidean and Minkowskian regions is studied. Our basic tool is the "double spectral…
New algebraic-numeric methods for loop integrals. Some 1-loop experience
D. Yu. Bardin, L. V. Kalinovskaya, F. V. Tkachov
We report our experiences with the generalized integration-by-parts algorithm [hep-ph/9609429] in the context of calculations of a realistic one-loop subset of diagrams.
From Hard to Soft Diffraction and Return
B. Z. Kopeliovich
The long standing mystery of smallness of diffractive dissociation of hadrons to large effective masses (the Pomeron-proton cross section is only 2 mb) witnesses that the gluonic c…
Single-spin asymmetry in DVCS: fragmentation region of polarised lepton
I. Akushevich, E. Kuraev, B. Shaikhatdenov
For the kinematical region when a hard photon is emitted predominantly close to the direction of motion of a longitudinally polarized initial electron and relatively small momentum…
Angle Dependence of Polarization Observables by Fragmentation of Deuterons to Pions
A. Yu. Illarionov, A. G. Litvinenko, G. I. Lykasov
The fragmentation of deuterons into pions with nonzero angle emitted in the kinematical region forbidden for free nucleon-nucleon collisions is analyzed. The inclusive relativistic…
Polarized Proton Nucleus Scattering
B. Z. Kopeliovich, T. L. Trueman
We show that, to a very good approximation, the ratio of the spin-flip to the non-flip parts of the elastic proton-nucleus amplitude is the same as for proton-nucleon scattering at…
Application of new multiloop QCD input to the analysis of data
A. L. Kataev, G. Parente, A. V. Sidorov
The new theoretical input to the analysis of the experimental data of the CCFR collaboration for structure function of deep inelastic scattering is considered. This inpu…
Spin effects in diffractive hadron photoproduction
S. V. Goloskokov
We study spin asymmetries in diffractive and vector meson production which are sensitive to the spin-dependent part of the two-gluon-nucleon coupling. It is found that t…
Nuclear structure functions and off-shell corrections
O. Benhar, S. Fantoni, G. I. Lykasov
The -th moments of the nuclear structure function are analyzed using the off-shell kinematics appropriate to describe deep inelastic electron-nucleus scattering w…
Spin Effects In Diffractive Reactions
S. V. Goloskokov
Double spin asymmetries in the diffractive and leptoproduction are discussed. It is shown that the asymmetries for longitudinally polarized lepton and longitudinal…
Update of the direct detection of dark matter and the role of the nuclear spin
V. A. Bednyakov, H. V. Klapdor-Kleingrothaus
We update our exploration of the MSSM parameter space at the weak scale where new accelerator and cosmological constraints are respected. The dependence of WIMP-nucleon cross secti…
On importance of dark matter for LHC physics
V. A. Bednyakov
I would like to attract attention of the LHC high-energy physics community to non-accelerator, low-energy experiments, that are also very sensitive to new physics. My example conce…
Quark Correlations Inside Hadrons And Single Diffraction
G. Musulmanbekov
Hadron structure is considered in the frame of Strongly Correlated Quark Model (SCQM). It is shown that quark correlations result in fluctuations of hadronic matter distributions a…
The Coulomb Phase Revisited
B. Z. Kopeliovich, A. V. Tarasov
Motivated by the forthcoming data from the E950 experiment at BNL for small angle polarized proton-carbon scattering we revisit the problem of Coulomb phase. The approximation usua…
New Anomalous Exchange in Regge Phenomenology and Hard Diffraction
N. I. Kochelev, D. -P. Min, Y. Oh +2
A new mechanism for hard diffraction based on the anomalous trajectory exchange, which we identify as the odd signature partner of the Pomeron, is suggested. We calculate the…
P-violating effects in low-energy Compton scattering
E. Bartos, V. Bytev, E. Kuraev
Parity of effects induced by one loop corrections of Standard model of Compton scattering are considered. We note the main effects arise from W contributions. Keeping in the mind s…
Q^2 evolution of parton distributions at small x
A. V. Kotikov, G. Parente
We investigate the Q^2 evolution of parton distributions at small x values, obtained in the case of flat initial conditions. The results are in excellent agreement with deep inelas…
Coherent particle production in collisions of relativistic nuclei
George L. Gogiberidze, Edward K. G. Sarkisyan, Liana K. Gelovani
Here we give the results of our study of features of dense groups, or spikes, of particles produced in Mg-Mg and C-Cu collisions at, respectively, 4.3 and 4.5 GeV/c/nucleon aimed t…
Analyticity and Quark-Gluon Structure of Hadrons
M. Majewski, V. A. Meshcheryakov
The amplitudes of hadron-hadron forward elastic scattering at high energy a re investigated on the basis of analiticity and crossing-symmetry which is valid in QCD. The universal u…
Finite sum of gluon ladders and high energy cross sections
R. Fiore, L. L. Jenkovszky, E. A. Kuraev +3
A model for the Pomeron at is suggested. It is based on the idea of a finite sum of ladder diagrams in QCD. Accordingly, the number of -channel gluon rungs and correspondi…
QCD coupling up to third order in standard and analytic perturbation theories
B. A. Magradze
We analyze two sets of specific functions, that/which form the basis of the nonpower asymptotic expansions both in the timelike and spacelike regions for single scale dependent QCD…
Soft QCD Dynamics of Elastic Scattering in Impact Parameter Representation
B. Z. Kopeliovich, I. K. Potashnikova, B. Povh +1
The elastic hadronic amplitude is calculated using the nonperturbative light-cone dipole representation for gluon bremsstrahlung. The data for large mass diffraction demand a two-s…