23 research outputs found
Neutrino Mixing and Leptonic CP Phase in Neutrino Oscillations
Oscillations of the Dirac neutrinos of three generations in vacuum are
considered with allowance made for the effect of the CP-violating leptonic
phase (analogue of the quark CP phase) in the lepton mixing matrix. The general
formulas for the probabilities of neutrino transition from one sort to another
in oscillations are obtained as functions of three mixing angles and the CP
phase. It is found that the leptonic CP phase can, in principle, be
reconstructed by measuring the oscillation-averaged probabilities of neutrino
transition from one sort to another. The manifestation of the CP phase as a
deviation of the probabilities of direct processes from those of inverse
processes is an effect that is practically unobservable as yet
Quark-Gluon String Model Description of Baryon Production in K^{\pm}N Interactions
The process of baryon production in K p collisions at high energies is
considered in the framework of the Quark-Gluon String Model. The contribution
of the string-junction mechanism to the strange baryon production is analysed.
The results of numerical calculations are in reasonable agreement with the data
on inclusive spectra of p, Lambda, bar{Lambda}, and on the bar{Lambda}/Lambda
asymmetry. The predictions for Xi and Omega baryons are presented.Comment: 19 pages, 7 figure
Lambda-Baryon Production in pi(+-)n Interactions
The process of Lambda-baryon production in pi-p collisions is considered. The
contribution of the string-junction mechanism to the strange baryon production
in meson-baryon scattering is anlysed. The results of numerical calculations in
the framework of the Quark-Gluon String model are in reasonable agreement with
the data.Comment: 10 pages and 5 figue
Feynman scaling violation on baryon spectra in pp collisions at LHC and cosmic ray energies
A significant asymmetry in baryon/antibaryon yields in the central region of
high energy collisions is observed when the initial state has non-zero baryon
charge. This asymmetry is connected with the possibility of baryon charge
diffusion in rapidity space. Such a diffusion should decrease the baryon charge
in the fragmentation region and translate into the corresponding decrease of
the multiplicity of leading baryons. As a result, a new mechanism for Feynman
scaling violation in the fragmentation region is obtained. Another numerically
more significant reason for the Feynman scaling violation comes from the fact
that the average number of cutted Pomerons increases with initial energy. We
present the quantitative predictions of the Quark-Gluon String Model (QGSM) for
the Feynman scaling violation at LHC energies and at even higher energies that
can be important for cosmic ray physics.Comment: 21 pages, 11 figures, and 1 table. arXiv admin note: substantial text
overlap with arXiv:1107.1615, arXiv:1007.320
Multiplicity Distribution and Mechanisms of the High-Energy Hadron Collisions
We discuss the multiplicity distribution for highest accessible energies of
- and - interactions from the point of view of the multiparton
collisions. The inelastic cross sections for the single, , and
multiple (double and, presumably, triple, ) parton collisions are
extracted from the analysis of the experimental data on the multiplicity
distribution up to the Tevatron energies. It follows that becomes
energy independent while increases with for
200 GeV. The observed growth of with multiplicity
is attributed to the increasing role of multiparton collisions for the high
energy - inelastic interactions.Comment: Revtex file, 17 pages, 5 figure