π-NInteractions in Gev Region

Section Asymmetry of the Reaction γp → π ◦ p in the Resonance Energy Region E γ = 0 . 5 − 1 . 1 GeV

The cross section asymmetry Σ has been measured for the photoproduction of π◦-mesons off protons, using polarized photons in the energy range Eγ = 0.5−1.1GeV. The CM angular coverage is θ∗ π = 85◦−125◦ with energy and angle steps of 25MeV and 5◦, respectively. The obtained Σ data, which cover the second and third resonance regions, are compared with existing experimental data and recent phenome...

0 Central Pb + Pb Collisions at 158 A GeV / c Studied by π − π −

Two-particle correlations have been measured for identified π from central 158 AGeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multidimensional study of the radii as a function of kT is presented, including a full correction for the resolution effects of the apparatus. The cross term R out−long of the standard fit in the Longitudinally CoMoving Syste...

IN MEASUREMENTS OF πN ↑ → π + π−N ON A POLARIZED TARGET AT 5.98, 11.85 AND 17.2 GeV/c.

Modelling nuclear effects in neutrino interactions in 1 GeV region

Description of ∆ excitation region in neutrinonucleus interactions is the most problematic ingredient in Monte Carlo codes [1]. Experiments provide cross sections with a precision ∼ 25% [2,3]. MC implementations are based on a combination of Rein-Sehgal pion production model [4] with Fermi gas model with different level of sophistication in kinematical assumptions. The basic dynamical rule is a...

Direct CP Violation in B ± → ρ ± π + π − in the ρ 0 - ω Interference Region 1