Production of baryon resonances in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>π</mml:mi><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:mo>+</mml:mo></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">C</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>12</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>interactions at 40 GeV/<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:math>
Annotatsiya
In conditions of $4\ensuremath{\pi}$-geometry, the production of ${\ensuremath{\Delta}}^{++}$ and ${\ensuremath{\Delta}}^{0}$ resonances in ${\ensuremath{\pi}}^{\ensuremath{-}}+$ $^{12}\mathrm{C}$ interactions at 40 GeV/$c$ was investigated for the first time. The masses and widths of resonances were obtained from an analysis of the experimental and background invariant mass distributions of $p{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ pairs. The fractions of charged pions coming from ${\ensuremath{\Delta}}^{++}$ and ${\ensuremath{\Delta}}^{0}$ decay as well as the inclusive cross-section of ${\ensuremath{\Delta}}^{++}$ and ${\ensuremath{\Delta}}^{0}$ production were determined. The results obtained were compared to the recent results on $\ensuremath{\Delta}(1232)$ production in $^{4}\mathrm{He}$ $+\mathrm{C}$ and $\mathrm{C}+\mathrm{C}$ collisions at 4.2 GeV/$c$ per nucleon, and $\mathrm{Ni}+\mathrm{Ni}$ and $\mathrm{Au}+\mathrm{Au}$ collisions at energies between 1 and $2A$ GeV.