https://doi.org/10.1140/epja/i2011-11079-2
Regular Article - Experimental Physics
Production of Δ0(1232)-resonances in p + 12C collisions at a momentum of 4.2 GeV/c
1
Department of Physics, COMSATS Institute of Information Technology, Park Road, Islamabad, Pakistan
2
Physical-Technical Institute of SPA “Physics-Sun” of Uzbek Academy of Sciences, Bodomzor Yo’li str. 2b, 100084, Tashkent, Uzbekistan
* e-mail: olimov@comsats.edu.pk
Received:
26
October
2010
Revised:
1
April
2011
Accepted:
2
May
2011
Published online:
20
June
2011
The production of Δ 0(1232)-resonances in p + 12C collisions at 4.2 GeV/c was investigated with 4π acceptance. The masses and widths of the resonances were obtained from ananalysis of foreground and background invariant-mass distributions of pπ − pairs obtained using an angular criterion. The fraction of charged π −-mesons coming from the Δ 0(1232) decay was estimated and compared to those obtained in earlier analyses. The momentum, transverse momentum, kinetic energy, rapidity, and emission angle distributions as well as the invariant cross-sections of Δ 0(1232)-resonances werere constructed in the laboratory frame. The freeze-out temperature of theΔ 0(1232)-resonances produced in p + 12C collisions was estimated and compared to the freeze-out temperatures obtained using different methods for Δ(1232)-resonances produced in other experiments with different sets of colliding nuclei at various incident energies.
© SIF, Springer-Verlag Berlin Heidelberg, 2011
