Analysis of Delta(0)(1232) production in collisions of protons with carbon nuclei at 4.2 GeV/c

作者：Olimov Khusniddin K^*; Haseeb Mahnaz Q; Olimov Alisher K; Khan Imran

来源：Central European Journal of Physics, 2011, 9(6): 1393-1409.

DOI：10.2478/s11534-011-0048-x

• delta resonances
• proton-nucleus collisions
• nuclear reactions involving few-nucleon systems

The production of Delta(0)(1232)-resonances in p+(12)C collisions at 4.2 GeV/c was analyzed with 4 pi acceptance. The mass distribution of Delta(0)(1232) was reconstructed using an angular criterion. The fraction of charged pi-mesons coming from Delta(0)(1232) decay was estimated and compared to those obtained in earlier works. The momentum, transverse momentum, kinetic energy, and rapidity distributions as well as invariant cross sections of Delta(0)(1232)-resonances were reconstructed in the laboratory frame. The mean kinematical characteristics of the reconstructed Delta(0)(1232) were compared to those of participant protons in experiment and within some of the models. The freeze-out temperature of Delta(0)(1232) estimated in the present analysis was compared with those obtained using different methods for Delta(1232) produced with other sets of colliding nuclei at various incident energies. The relative number of nucleons excited to Delta(0) (1232) at freeze-out conditions in p+(12)C collisions was estimated.

• 出版日期2011-12