122791439
Search for parity-nonconservation effects in deep-inelastic μ-N interaction
Abstract The difference of the cross sections for deep inelastic scattering of muons with average momenta 21 GeV/ c with right and left helicity at large angles, i.e., with large momentum transfer, has been measured. No statistically-significant dependence of cross sections on the longitudinal polarization of muons has been found, i.e. no parity-nonconservation effects in deep inelastic μN interaction have been observed. The magnitude of the cross-section asymmetry R = [〈σ R 〉 − 〈σ L 〉] [〈σ R 〉+ + 〈σ L 〉] may be represented as R = β 〈 Q 2 〉 = (− 4 ± 6) × 10 −3 〈 Q 2 , (GeV/ c ) 2 〉. The limitations G o ( μ ) = (+ 6 ± 10) G have been obtained for the constant G o ( μ ) of vector-axial interaction ( G o (μ) 2 ) [ μ γα(1 + γ 5 )μ] J α o (hadron, V-A).
117883458
Experimental study of gluon and sea quark polarizations (The first stage of the POLEX program at UNK)
181884583
MODULAR ELECTRONICS FOR ALPHANUMERICAL AND COLOR SEMIGRAPHIC INFORMATION DISPLAY ON THE TV MONITORS
108002426
Characteristics of wire spark chambers with ferrite core readout
188602506
HANDLING OF OSCILLOGRAMS ON THE SCANNING TABLES OF PIKOTYPE
182241489
FOCUSING DOUBLE ARM SPECTROMETER
121964666
The Area Law of the Wilson Loop and Vacuum Field Correlators
Abstract The Wilson loop average in the background vacuum fields is expressed via the cumulant expansion in terms of irreducible correlators of the gluon field. Assuming a fast fall-off of the latter at large distance one obtains the area law for large contours.
9731102
Bottomonium dipion transitions
Dipion transitions of the subthreshold bottomonium levels {upsilon}(nS){yields}{upsilon}(n{sup '}S){pi}{pi} with n>n{sup '}, n=2, 3, 4 n{sup '}=1, 2 are studied in the framework of the chiral decay Lagrangian, derived earlier. The channels BB, BB*+c.c., B*B* are considered in the intermediate state and realistic wave functions of {upsilon}(nS), B and B* are used in the overlap matrix elements. Imposing the Adler zero requirement on the transition matrix element, one obtains 2d and 1d dipion spectra in reasonable agreement with experiment.
121889668
Coherent mixing in three and four quark generations
New dynamical mechanism of quark mass generations and mixing is demonstrated in the examples of three and four generations. In the framework of the new mixing pattern, called the coherent mixing, the CKM elements are predicted compatible with experimental data for three generations, and are strongly constrained for four generations.
16423126
DECONFINEMENT AND QUARK–GLUON PLASMA
The theory of confinement and deconfinement is discussed as based on the properties of the QCD vacuum. The latter are described by field correlators of color-electric and color-magnetic fields in the vacuum, which can be calculated analytically and on the lattice. As a result one obtains a self-consistent theory of the confined region in the (μ, T) plane with realistic hadron properties. At the boundary of the confining region, the color-electric confining correlator vanishes, and the remaining correlators describe strong nonperturbative dynamics in the deconfined region with (weakly) bound states. Resulting equation of state for μ = 0, p(T), are in good agreement with lattice data. Phase transition occurs due to evaporation of a part of the color-electric gluon condensate, and the resulting critical temperatures Tc(μ) for different nf are in good correspondence with available data.
36961641
Asymptotic freedom in strong magnetic fields.
Perturbative gluon exchange interaction between quark and antiquark, or in a 3q system, is enhanced in a magnetic field and may cause vanishing of the total qq[over ¯] or 3q mass, and even unlimited decrease of it-recently called the magnetic collapse of QCD. The analysis of the one-loop correction below shows a considerable softening of this phenomenon due to qq[over ¯] loop contribution, similar to the Coulomb case of QED, leading to approximately logarithmic damping of gluon exchange interaction (≈O(1/ln|eB|)) at large magnetic field.